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    NIS HELP Please....

    I am running 7.10 on a server and using NIS to deal with logins. My student workstations are up to 8.04.1. I use NFS to mount /home for users and DHCP for IP's. Lately, for no aparent reason (at least that I can figure out), the students are logged in and suddenly they can do nothing and their workstations freeze and neet to be hard booted. After the restart, they can not even log in. I am guessing something is going on with NIS? I tried to restart NIS on both the server and client and still nothing. I end up restarting the sever and when it comes back up, dhcpd3-server will not start until I disable the internal interface and re-enable it. After doing this, the students are able to log in and work again.

    #2
    Re: NIS HELP Please....

    nobody's picking this one up, so...

    i don't have experience with a configuration like yours with ubuntu systems.
    i can only try and give you some general hints to debug the issue.
    i'll probably state the obvious, nonetheless...

    all the clients showing the same behaviour (all at the same time you said?)
    would point to a problem on the server.

    but all the clients "freezing" hints at a more general network issue, rather
    than simply nis.

    you could start by configuring one of the clients not use nis and see how
    it reacts. if you do this for 1 user on 1 client machine, then it's just a line
    in passwd and few others, right?

    then i would move its home directory local to the client and avoid the nfs
    mount.

    btw, do you use hard nfs mounts or soft nfs mounts?

    wouldn't know what else to suggest except a systematic approach to try
    and pinpoint the failing subsystem...

    hth
    gnu/linux is not windoze

    Comment


      #3
      Re: NIS HELP Please....

      Thank you for the reply. I appreciate the help.

      OK, I do have a local account on all the computers (local admin account) and when I log in with that everything works, including networking (ping, http...)

      I am not sure what you mean by hard/soft nft mounting, I have a line that mounts the server /home at boot.

      In my troubleshooting I have already done, I noticed that eth0 starts up and the server can see the local network ( i can ping the workstations ) but the workstations can not log in to the server. I noticed that dhcp3-server did not start (no interface to listen on) and I can not start it manually until I disable eth0 and re-enable it (weird I know). I suspect that eth0 might be failing, but I do not have another nic at the moment. I am wondering if this symptom has something to do with the random failing of nis (I think nis) during the day. I do not know what logs to inspect to check? When this behavior happens, the students try to log in, the login screen dissapears and it looks like it is going to log in but just hangs there at the background to the login. This suggests that the nis lookup might be successful? If so, what else here would be failing? I was thinking maybe nfs?

      Thanks.
      Mike

      Comment


        #4
        Re: NIS HELP Please....

        #1 make sure the network is ok.
        take a client's nic and put it in the server.
        test basic services.
        ping, ssh...to and from.
        then test your environment with nis, nfs, etc...
        if everything's ok, then it's the nic.
        otherwise swap it back and start test one subsystem at a time.

        the local admin user (i assume root) will go to /root, right?
        so it won't use nfs.
        so you can't rule it out and you still don't know if it's nis or nfs.
        that's not good.
        you'll have to isolate things and test them one at a time.
        that's why i suggested to reconfigure a normal user.
        so that it won't use nis, but will still use nfs.
        and log clients in from a tty instead from kdm/gdm/xdm whatever...

        hard vs soft nfs mounts (you'll find plenty by googleing)...
        basically...
        hard mounts (default) will countinue to wait for the server forever.
        soft mounts will stop trying after a given timeout.

        after checking the nis thing i would then check nfs.
        move a user's home to the local machine.
        leave the nfs config, but soft rather then hard.
        if it logs in, check if home dir is nfs o local.
        ...

        gnu/linux is not windoze

        Comment


          #5
          Re: NIS HELP Please....

          Thank you for the tips... I took your advice and ....

          OK, 2 days with no problems and then it happened...

          So, when the Students froze... I tried the following...
          From my computer (no nis no nfs) - ssh to server (fine) (network is OK)
          SSH from server to student workstations (fine)
          From student workstation - ls /home (showed all nfs mounted folders fine) (NFS is OK)
          From student workstation - ypcat passwd (fine) (NIS is OK)
          From student workstation - ping google.com (fine) (DNS is OK)

          I logged into the student workstation using an account on workstation (local) that has its home on server via nfs. That worked fine.

          What else might I be missing? I feel like there really is no problem and all is fine (yea right).

          Mike

          Comment


            #6
            Re: NIS HELP Please....

            very good!

            though, not really 100% sure about...
            Originally posted by knichel
            From student workstation - ls /home (showed all nfs mounted folders fine) (NFS is OK)
            this might really only show the local mount points, right?
            df or mount will show the fs mount table.
            or ls /home/some_actual_user_home will show the files inside...

            so...
            students workstations freeze all at the same time, but:
            - ctrl-alt-fx works
            - log in via tty is successful
            - and the workstation appears to be working properly (from command line)

            is all of the above correct?

            Originally posted by knichel
            What else might I be missing? I feel like there really is no problem and all is fine (yea right).
            disk space, for example.
            i know it sounds silly but a lot of stupid issues are due to that...
            so:
            - make sure you have enough disk space on clients and server both before and after log in
            - clean the apt cache (apt-get clean autoclean)
            - check /tmp and /var in particular (if they aren't on separate partitions, then check /)
            - check where the browsers' caches are configured to write to (home dirs?)
            - ...
            stuff like that.

            questions (unfortunately it is not easy from here):
            - workstations are 8.04, you said: kubuntu?
            - if yes, do you use the kde network manager?
            - any funny messages in /var/log/messages (workstations and/or server)?
            - could it be it's not a functional issue, but a performance issue instead?

            suggestions (i still think it's something on the server but...):
            - start top on tty1 (clients and server) to check cpu and mem usage
            - start while true; do uptime; sleep 5; done on tty2 (clients and server) to log avg loads
            - use ps on both clients and server to look for zombie processes

            then start differentiating your clients (one change on one client at a time):
            - configure one with gnome ubuntu
            - on another one disable the network manager and stop kde-network-manager
            (put the net config statically in /etc/network/interface)
            - ...
            aiming to isolate the failing bit...hopefully.
            gnu/linux is not windoze

            Comment


              #7
              Re: NIS HELP Please....

              I will check on these next time things go wrong....
              though, not really 100% sure about...
              Quote from: knichel on September 13, 2008, 09:29:49 am
              From student workstation - ls /home (showed all nfs mounted folders fine) (NFS is OK)
              this might really only show the local mount points, right?
              What I meant was that I did ls /home/someuser and saw documents...

              I checked disk space and this is waht I have...
              Code:
              Filesystem      Size Used Avail Use% Mounted on
              /dev/sda1       74G 7.2G  63G 11% /
              varrun        1005M 336K 1005M  1% /var/run
              varlock       1005M   0 1005M  0% /var/lock
              udev         1005M  88K 1005M  1% /dev
              devshm        1005M   0 1005M  0% /dev/shm
              lrm         1005M  34M 971M  4% /lib/modules/2.6.22-15-generic/volatile
              /dev/sdb1       147G  81G  59G 58% /backup
              /dev/sda2       70G  14G  54G 20% /home
              When the workstations freeze again, I will try the last 2 suggestions.

              BTW, when the workstations freeze, my personal laptop (connected to the same network but without NIS and NFS) works fine and can get out of the network (www) fine.

              Thanks again for all of your help.

              Comment


                #8
                Re: NIS HELP Please....

                Originally posted by knichel
                BTW, when the workstations freeze, my personal laptop (connected to the same network but without NIS and NFS) works fine and can get out of the network (www) fine.
                yeah.
                as i said, everything still points to some issue on the server.
                the probability of a piece of software (rubbish as it may be)
                to go bust always at the same time always on all your clients
                simultaneously is still pretty remote...

                Originally posted by knichel
                Thanks again for all of your help.
                not that i'm helping much, am i?
                though, i will want to know what it is eventually.
                alright?

                cheers
                gnu/linux is not windoze

                Comment


                  #9
                  Re: NIS HELP Please....

                  So, it happened again today 9/16/08 at 12:00 pm or so...
                  I did the wile true; do uptime; sleep 5; done and have the following results...

                  ============== AFTER FREEZE ==============
                  admin@Server:~$ while true; do uptime; sleep 5; done
                  13:01:56 up 4 days, 23 min, 1 user, load average: 1.00, 0.99, 0.91
                  13:02:01 up 4 days, 23 min, 1 user, load average: 1.00, 0.99, 0.91
                  13:02:06 up 4 days, 23 min, 1 user, load average: 1.00, 0.99, 0.91

                  ============== AFTER RESTART ==============
                  13:38:25 up 10 min, 1 user, load average: 0.06, 0.20, 0.16
                  13:38:30 up 11 min, 1 user, load average: 0.05, 0.19, 0.16
                  13:38:35 up 11 min, 1 user, load average: 0.05, 0.19, 0.16

                  I forgot to check ps for zombie processes.

                  I was able to surf the net from my laptop, but none of the student workstations were working. I am thinking that this suggests a problem with NIS or NFS since the student workstations rely on it.

                  Does this output suggest anything to you?

                  Comment


                    #10
                    Re: NIS HELP Please....

                    the avg loads simply say that (i assume your server has 1 cpu)
                    your server is completely (1.0 avg load / 1 cpu = 100%) busy doing something...
                    so, obviously, it won't be able to serve any clients requests...of any type.
                    it would be interesting to find out what it is busy doing.
                    you could use top for that.
                    and ps maybe.
                    gnu/linux is not windoze

                    Comment


                      #11
                      Re: NIS HELP Please....

                      I tried using top, but did not see anything using much CPU or RAM... Weird...

                      I will try ps next time. How do I check for Zombie processes?

                      Comment


                        #12
                        Re: NIS HELP Please....

                        Originally posted by knichel
                        I tried using top, but did not see anything using much CPU or RAM... Weird...
                        yeah...funny!
                        you're sure there's no messages in the system logs that could hint at the issue?

                        Originally posted by knichel
                        I will try ps next time. How do I check for Zombie processes?
                        i have ps aliased to ps -eo pid,ppid,state,start,euid,euser,tty,args
                        the 3rd column is the process state.
                        S is sleeping, R is running, ..., Z is zombies.
                        you could enter something like:
                        Code:
                        ps -eo pid,ppid,state,start,euid,euser,tty,args | grep " Z "
                        you could also do something like...
                        start this script (put it in a file named uptime.sh, for example) when you boot your server:
                        Code:
                        #!/bin/bash
                        
                        exec 1> /var/log/uptime.log 2> /dev/null
                        
                        while true
                        do
                         uptime
                         sleep 5
                        done
                        and keep an eye on it with:
                        Code:
                        tail -111f /var/log/uptime.log
                        start it before your clients start working.
                        see how the avg loads change as your clients work.
                        perhaps you can at least spot what triggers the problem.
                        gnu/linux is not windoze

                        Comment


                          #13
                          Re: NIS HELP Please....

                          Thanks again for the tips.  As I browse the /var/log/syslog file around the time things went south...

                          ===  I see hundreds of these all day ===
                          Sep 16 11:41:57 CiscoServer kernel: [341887.821259] IN=eth1 OUT= MAC= SRC=24.148.112.102 DST=224.0.0.251 LEN=70 TOS=0x00 PREC=0x00 TTL=255 ID=0 DF PROTO=UDP SPT=5353 DP
                          T=5353 LEN=50

                          The above seems to be a multicast address, not sure what it is for... and why it is coming from my eth1?
                          Upon further investigation... this Looks like zeroconf traffic (avahi/mdns)
                          Can I stop the avahi daemon without causing other problems? Can I purge it? make it not start at boot?

                          === I see these every so often ===
                          Sep 16 11:41:57 CiscoServer kernel: [341888.428595] IN=eth1 OUT= MAC=ff:ff:ff:ff:ff:ff:00:30:b8:c7:09:a0:08:00 SRC=10.11.0.1 DST=255.255.255.255 LEN=348 TOS=0x00 PREC=0x00 TTL=255 ID=29474 PROTO=UDP SPT=67 DPT=68 LEN=328

                          The above confuses me as how can I be receiving RFC1918 addresses from a live internet connection?

                          === And These ===
                          Sep 16 11:49:47 CiscoServer kernel: [342358.183332] IN=eth1 OUT= MAC=00:15:17:19:2d:c8:00:30:b8:c7:09:a0:08:00 SRC=24.64.99.141 DST=24.148.112.102 LEN=516 TOS=0x00 PREC=0x00 TTL=61 ID=64536 PROTO=UDP SPT=27733 DPT=1027 LEN=496

                          This one concerns me... http://www.auditmypc.com/port/tcp-port-1027.asp
                          Seems to be a potential virus.

                          I do have iptables running (firewall) and only allow in a handfull of ports (80, 143, 443, 22, and a couple of custom ports) Plus anything already established (like returns from a request from inside).

                          I do not know how to rule out dos attack.  If you have suggestions, I would appreciate it.

                          Comment


                            #14
                            Re: NIS HELP Please....

                            it's very difficult to say anything about those packets you see in your logs.
                            i would need to know exactly how your network is set up.
                            and it would still be very difficult.
                            besides, you wouldn't want to give that information away anyway.

                            i agree there's some funny stuff in there, though...
                            Originally posted by knichel
                            Sep 16 11:41:57 CiscoServer kernel: [341888.428595] IN=eth1 OUT= MAC=ff:ff:ff:ff:ff:ff:00:30:b8:c7:09:a0:08:00 SRC=10.11.0.1 DST=255.255.255.255 LEN=348 TOS=0x00 PREC=0x00 TTL=255 ID=29474 PROTO=UDP SPT=67 DPT=68 LEN=328

                            The above confuses me as how can I be receiving RFC1918 addresses from a live internet connection?
                            this, in theory, is a broadcast packet received from a private network.
                            whether or not it makes sense in your config i don't know.

                            it is also difficult to say whether or not you can remove avahi.
                            you should know whether or not you use it.
                            if you asked, you probably don't use it...
                            so, i reckon you can remove it.
                            i don't use it, so i personally always remove it.
                            gnu/linux is not windoze

                            Comment


                              #15
                              Re: NIS HELP Please....

                              Oh we have had several days without incident... and then it happened...

                              I did while true; do uptime; sleep 5; done on server and client...
                              SERVER:
                              Code:
                               10:51:42 up 7 days, 21:24, 1 user, load average: 0.99, 0.76, 0.36
                               10:51:47 up 7 days, 21:24, 1 user, load average: 0.99, 0.77, 0.37
                               10:51:52 up 7 days, 21:24, 1 user, load average: 0.99, 0.77, 0.37
                               10:52:12 up 7 days, 21:24, 1 user, load average: 0.99, 0.78, 0.38
                               10:52:17 up 7 days, 21:24, 1 user, load average: 0.99, 0.79, 0.38
                              CLIENT:
                              Code:
                               10:51:38 up 2:38, 2 users, load average: 0.00, 0.05, 0.07
                               10:51:43 up 2:38, 2 users, load average: 0.00, 0.05, 0.07
                               10:51:48 up 2:38, 2 users, load average: 0.00, 0.05, 0.07
                              AND
                              I did ps -eo pid,ppid,state,start,euid,euser,tty,args on both...
                              SERVER :
                              Code:
                               PID PPID S STARTED EUID EUSER  TT    COMMAND
                                1   0 S  Sep 16   0 root   ?    /sbin/init
                                2   0 S  Sep 16   0 root   ?    [kthreadd]
                                3   2 S  Sep 16   0 root   ?    [migration/0]
                                4   2 S  Sep 16   0 root   ?    [ksoftirqd/0]
                                5   2 S  Sep 16   0 root   ?    [watchdog/0]
                                6   2 S  Sep 16   0 root   ?    [migration/1]
                                7   2 S  Sep 16   0 root   ?    [ksoftirqd/1]
                                8   2 S  Sep 16   0 root   ?    [watchdog/1]
                                9   2 S  Sep 16   0 root   ?    [events/0]
                                10   2 S  Sep 16   0 root   ?    [events/1]
                                11   2 S  Sep 16   0 root   ?    [khelper]
                                31   2 S  Sep 16   0 root   ?    [kblockd/0]
                                32   2 S  Sep 16   0 root   ?    [kblockd/1]
                                33   2 S  Sep 16   0 root   ?    [kacpid]
                                34   2 S  Sep 16   0 root   ?    [kacpi_notify]
                               148   2 S  Sep 16   0 root   ?    [kseriod]
                               175   2 S  Sep 16   0 root   ?    [pdflush]
                               177   2 S  Sep 16   0 root   ?    [kswapd0]
                               228   2 S  Sep 16   0 root   ?    [aio/0]
                               229   2 S  Sep 16   0 root   ?    [aio/1]
                               2118   2 S  Sep 16   0 root   ?    [ksuspend_usbd]
                               2119   2 S  Sep 16   0 root   ?    [khubd]
                               2159   2 S  Sep 16   0 root   ?    [ata/0]
                               2160   2 S  Sep 16   0 root   ?    [ata/1]
                               2161   2 S  Sep 16   0 root   ?    [ata_aux]
                               2176   2 S  Sep 16   0 root   ?    [khpsbpkt]
                               2306   2 S  Sep 16   0 root   ?    [scsi_eh_0]
                               2307   2 S  Sep 16   0 root   ?    [scsi_eh_1]
                               2349   2 S  Sep 16   0 root   ?    [knodemgrd_0]
                               2390   2 S  Sep 16   0 root   ?    [scsi_eh_2]
                               2693   2 S  Sep 16   0 root   ?    [kjournald]
                               2902   1 S  Sep 16   0 root   ?    /sbin/udevd --daemon
                               3979   2 S  Sep 16   0 root   ?    [kpsmoused]
                               4445   1 S  Sep 16  100 dhcp   ?    dhclient3 -e IF_METRIC=100 -pf /var/run/dhclient.eth1
                               4519   2 S  Sep 16   0 root   ?    [kjournald]
                               4520   2 S  Sep 16   0 root   ?    [kjournald]
                               4742   1 S  Sep 16   1 daemon  ?    /sbin/portmap
                               4761   1 S  Sep 16  111 statd  ?    /sbin/rpc.statd
                               4893   1 S  Sep 16   0 root   tty4   /sbin/getty 38400 tty4
                               5090   1 S  Sep 16   0 root   ?    /usr/sbin/acpid -c /etc/acpi/events -s /var/run/acpid
                               5118   2 S  Sep 16   0 root   ?    [kondemand/0]
                               5119   2 S  Sep 16   0 root   ?    [kondemand/1]
                               5211   1 S  Sep 16  101 syslog  ?    /sbin/syslogd -u syslog
                               5266   1 S  Sep 16   0 root   ?    /bin/dd bs 1 if /proc/kmsg of /var/run/klogd/kmsg
                               5268   1 S  Sep 16  102 klog   ?    /sbin/klogd -P /var/run/klogd/kmsg
                               5289   1 S  Sep 16  104 104   ?    /usr/bin/dbus-daemon --system
                               5305   1 S  Sep 16   0 root   ?    /usr/sbin/NetworkManager --pid-file /var/run/NetworkM
                               5319   1 S  Sep 16   0 root   ?    /usr/sbin/NetworkManagerDispatcher --pid-file /var/ru
                               5338   1 S  Sep 16  107 107   ?    /usr/sbin/hald
                               5339 5338 S  Sep 16   0 root   ?    hald-runner
                               5398   1 S  Sep 16   0 root   ?    /usr/sbin/sshd
                               5435 5339 S  Sep 16   0 root   ?    /usr/lib/hal/hald-addon-cpufreq
                               5436 5339 S  Sep 16  107 107   ?    hald-addon-acpi: listening on acpid socket /var/run/a
                               5462 5339 S  Sep 16  107 107   ?    hald-addon-storage: polling /dev/scd0 (every 2 sec)
                               5479   1 S  Sep 16   0 root   ?    /usr/sbin/ypserv
                               5482   1 S  Sep 16   0 root   ?    /usr/sbin/rpc.yppasswdd -D /etc -e chsh
                               5485   1 S  Sep 16   0 root   ?    /usr/sbin/rpc.ypxfrd
                               5493   1 S  Sep 16   0 root   ?    /usr/sbin/ypbind
                               5555   1 S  Sep 16   0 root   ?    /usr/sbin/cupsd
                               5591   1 S  Sep 16   0 root   ?    /bin/sh /usr/bin/mysqld_safe
                               5631 5591 S  Sep 16  109 mysql  ?    /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/my
                               5632 5591 S  Sep 16   0 root   ?    logger -p daemon.err -t mysqld_safe -i -t mysqld
                               5697   1 S  Sep 16  112 openldap ?    /usr/sbin/slapd -g openldap -u openldap
                               5823   1 S  Sep 16  113 clamav  ?    /usr/bin/freshclam -d --quiet
                               5834   1 S  Sep 16   0 root   ?    /usr/sbin/darkstat -i eth1 -d /var/lib/darkstat -r /v
                               5853   1 S  Sep 16 65534 nobody  ?    /usr/lib/GNUstep/System/Tools/gdomap -I /var/run/gdom
                               5923   2 D  Sep 16   0 root   ?    [lockd]
                               5924   2 S  Sep 16   0 root   ?    [rpciod/0]
                               5925   2 S  Sep 16   0 root   ?    [rpciod/1]
                               5929   2 S  Sep 16   0 root   ?    [nfsd4]
                               5930   2 S  Sep 16   0 root   ?    [nfsd]
                               5937   2 S  Sep 16   0 root   ?    [nfsd]
                               5941   1 S  Sep 16   0 root   ?    /usr/sbin/rpc.mountd
                               6012   1 S  Sep 16   0 root   ?    /usr/lib/postfix/master
                               6032 6012 S  Sep 16  116 postfix ?    qmgr -l -t fifo -u
                               6045   1 S  Sep 16   0 root   ?    /usr/sbin/nmbd -D
                               6047   1 S  Sep 16   0 root   ?    /usr/sbin/smbd -D
                               6074   2 S  Sep 22   0 root   ?    [pdflush]
                               6103   1 S  Sep 16   0 root   ?    /usr/sbin/dovecot
                               6107 6047 S  Sep 16   0 root   ?    /usr/sbin/smbd -D
                               6110 6103 S  Sep 16   0 root   ?    dovecot-auth
                               6121   1 S  Sep 16   0 root   ?    /usr/sbin/rpc.rquotad
                               6141   1 S  Sep 16   0 root   ?    /usr/sbin/dhcdbd --system
                               6158   1 S  Sep 16   0 root   ?    /usr/sbin/hcid -x -s
                               6176   2 S  Sep 16   0 root   ?    [krfcommd]
                               6179 6103 S  Sep 16  117 dovecot ?    imap-login
                               6180 6103 S  Sep 16  117 dovecot ?    imap-login
                               6201   1 S  Sep 16   0 root   ?    /usr/sbin/squid -D -sYC
                               6203 6201 S  Sep 16  13 proxy  ?    (squid) -D -sYC
                               6225 6203 S  Sep 16  13 proxy  ?    (unlinkd)
                               6226   1 S  Sep 16  115 dhcpd  ?    /usr/sbin/dhcpd3 -q eth0 -pf /var/run/dhcp3-server/dh
                               6294   1 S  Sep 16   1 daemon  ?    /usr/sbin/atd
                               6308   1 S  Sep 16   0 root   ?    /usr/sbin/cron
                               6336   1 S  Sep 16   0 root   ?    /usr/sbin/apache2 -k start
                               6411   1 S  Sep 16   0 root   ?    /usr/bin/kdm -config /var/run/kdm/kdmrc
                               6447 6411 S  Sep 16   0 root   tty7   /usr/bin/X -br -nolisten tcp :0 vt7 -auth /var/run/xa
                               6463   1 S  Sep 16   0 root   ?    /usr/bin/perl /usr/share/webmin/miniserv.pl /etc/webm
                               7464 6336 S  Sep 22  33 www-data ?    /usr/sbin/apache2 -k start
                              14955 5398 S 08:22:16   0 root   ?    sshd: aitadmin [priv]
                              14957 14955 S 08:22:18 1000 aitadmin ?    sshd: aitadmin@pts/0
                              14958 14957 S 08:22:18 1000 aitadmin pts/0  -bash
                              15008 6336 S 08:26:27  33 www-data ?    /usr/sbin/apache2 -k start
                              15279 6012 S 09:20:48  116 postfix ?    pickup -l -t fifo -u -c
                              15302 6336 S 09:26:42  33 www-data ?    /usr/sbin/apache2 -k start
                              15672 14958 R 10:52:23 1000 aitadmin pts/0  ps -eo pid,ppid,state,start,euid,euser,tty,args
                              16798 6012 S  Sep 17  116 postfix ?    tlsmgr -l -t unix -u -c
                              16805 6103 S  Sep 17  117 dovecot ?    imap-login
                              23625 6411 S  Sep 18   0 root   ?    -:0
                              23628 23625 S  Sep 18   0 root   ?    /usr/bin/kdm_greet
                              CLIENT:
                              Code:
                               PID PPID S STARTED EUID EUSER  TT    COMMAND
                                1   0 S 08:13:38   0 root   ?    /sbin/init
                                2   0 S 08:13:38   0 root   ?    [kthreadd]
                                3   2 S 08:13:38   0 root   ?    [migration/0]
                                4   2 S 08:13:38   0 root   ?    [ksoftirqd/0]
                                5   2 S 08:13:38   0 root   ?    [watchdog/0]
                                6   2 S 08:13:38   0 root   ?    [migration/1]
                                7   2 S 08:13:38   0 root   ?    [ksoftirqd/1]
                                8   2 S 08:13:38   0 root   ?    [watchdog/1]
                                9   2 S 08:13:38   0 root   ?    [events/0]
                                10   2 S 08:13:38   0 root   ?    [events/1]
                                11   2 S 08:13:38   0 root   ?    [khelper]
                                46   2 S 08:13:38   0 root   ?    [kblockd/0]
                                47   2 S 08:13:38   0 root   ?    [kblockd/1]
                                50   2 S 08:13:38   0 root   ?    [kacpid]
                                51   2 S 08:13:38   0 root   ?    [kacpi_notify]
                               124   2 S 08:13:39   0 root   ?    [kseriod]
                               164   2 S 08:13:40   0 root   ?    [pdflush]
                               165   2 S 08:13:40   0 root   ?    [pdflush]
                               166   2 S 08:13:40   0 root   ?    [kswapd0]
                               207   2 S 08:13:40   0 root   ?    [aio/0]
                               208   2 S 08:13:40   0 root   ?    [aio/1]
                               1501   2 S 08:13:42   0 root   ?    [ksuspend_usbd]
                               1504   2 S 08:13:42   0 root   ?    [khubd]
                               1565   2 S 08:13:42   0 root   ?    [ata_aux]
                               2533   2 S 08:13:45   0 root   ?    [kjournald]
                               2752   1 S 08:13:52   0 root   ?    /sbin/udevd --daemon
                               3103   2 S 08:13:53   0 root   ?    [kpsmoused]
                               4227   2 S 08:13:57   0 root   ?    [kjournald]
                               4395   1 S 08:13:57   1 daemon  ?    /sbin/portmap
                               4413   1 S 08:13:58  110 statd  ?    /sbin/rpc.statd
                               4823   2 S 08:13:59   0 root   ?    [kondemand/0]
                               4824   2 S 08:13:59   0 root   ?    [kondemand/1]
                               4908   1 S 08:13:59  102 syslog  ?    /sbin/syslogd -u syslog
                               4962   1 S 08:13:59   0 root   ?    /bin/dd bs 1 if /proc/kmsg of /var/run/klogd/kmsg
                               4964   1 S 08:13:59  103 klog   ?    /sbin/klogd -P /var/run/klogd/kmsg
                               4986   1 S 08:14:00  106 106   ?    /usr/bin/dbus-daemon --system
                               5002   1 S 08:14:00   0 root   ?    /usr/sbin/NetworkManager --pid-file /var/run/NetworkM
                               5016   1 S 08:14:00   0 root   ?    /usr/sbin/NetworkManagerDispatcher --pid-file /var/ru
                               5066   1 S 08:14:00   0 root   ?    /usr/sbin/sshd
                               5111   1 S 08:14:00  107 avahi  ?    avahi-daemon: running [ws-10.local]
                               5112 5111 S 08:14:00  107 avahi  ?    avahi-daemon: chroot helper
                               5136   1 S 08:14:01   0 root   ?    /usr/sbin/ypbind
                               5296   1 S 08:14:12   0 root   ?    /usr/sbin/cupsd
                               5397   1 S 08:14:13   0 root   ?    /usr/sbin/dhcdbd --system
                               5416   1 S 08:14:13  109 109   ?    /usr/sbin/hald
                               5419   1 S 08:14:13   0 root   ?    /usr/sbin/console-kit-daemon
                               5420 5416 S 08:14:13   0 root   ?    hald-runner
                               5494 5420 S 08:14:14   0 root   ?    hald-addon-input: Listening on /dev/input/event2 /dev
                               5507 5420 S 08:14:14  109 109   ?    hald-addon-acpi: listening on acpid socket /var/run/a
                               5519 5420 S 08:14:14   0 root   ?    hald-addon-storage: no polling on /dev/fd0 because it
                               5526 5420 S 08:14:14   0 root   ?    hald-addon-storage: polling /dev/scd0 (every 2 sec)
                               5546   1 S 08:14:14   0 root   ?    /usr/sbin/hcid -x -s
                               5552   2 S 08:14:14   0 root   ?    [btaddconn]
                               5553   2 S 08:14:14   0 root   ?    [btdelconn]
                               5590   2 S 08:14:14   0 root   ?    [krfcommd]
                               5624   1 S 08:14:14   1 daemon  ?    /usr/sbin/atd
                               5638   1 S 08:14:14   0 root   ?    /usr/sbin/cron
                               5666   1 S 08:14:15   0 root   ?    /usr/sbin/apache2 -k start
                               5681 5666 S 08:14:15  33 www-data ?    /usr/sbin/apache2 -k start
                               5735   1 S 08:14:16   0 root   ?    /usr/lib/kde4/bin/kdm
                               5762 5735 S 08:14:16   0 root   tty7   /usr/bin/X -nolisten tcp :0 vt7 -auth /var/run/xauth/
                               5779   1 S 08:14:16   0 root   tty1   /sbin/getty 38400 tty1
                               5782 5735 S 08:14:16   0 root   ?    -:0
                               5805 5397 S 08:14:18  101 dhcp   ?    /sbin/dhclient -1 -lf /var/lib/dhcp3/dhclient.eth0.le
                               5854   2 S 08:14:20   0 root   ?    [lockd]
                               5941   1 S 08:14:23   0 root   ?    dbus-launch --autolaunch 96790d4bb3ad0b688f0e75af48bf
                               5942   1 S 08:14:23   0 root   ?    /usr/bin/dbus-daemon --fork --print-pid 5 --print-add
                               5956 5782 S 08:15:02 1122 1122   ?    /bin/sh /usr/bin/x-session-manager
                               6031 5956 S 08:15:04 1122 1122   ?    /usr/bin/ssh-agent x-session-manager
                               6061   1 S 08:15:05   0 root   ?    start_kdeinit --new-startup +kcminit_startup
                               6062   1 S 08:15:05 1122 1122   ?    kdeinit Running...
                               6065   1 S 08:15:05 1122 1122   ?    dcopserver [kdeinit] --nosid
                               6068 6062 S 08:15:10 1122 1122   ?    klauncher [kdeinit] --new-startup
                               6070   1 S 08:15:10 1122 1122   ?    kded [kdeinit] --new-startup
                               6075 5956 S 08:15:12 1122 1122   ?    kwrapper ksmserver
                               6077   1 S 08:15:12 1122 1122   ?    ksmserver [kdeinit]
                               6078 6062 S 08:15:12 1122 1122   ?    kwin [kdeinit] -session 10a7732d310001220883034000000
                               6080   1 S 08:15:12 1122 1122   ?    kdesktop [kdeinit]
                               6082   1 S 08:15:14 1122 1122   ?    kicker [kdeinit]
                               6086   1 S 08:15:16 1122 1122   ?    kio_uiserver [kdeinit]
                               6102 6062 S 08:15:18 1122 1122   ?    /usr/bin/artsd -F 10 -S 4096 -s 60 -m artsmessage -c
                               6105   1 S 08:15:18 1122 1122   ?    kaccess [kdeinit]
                               6109   1 S 08:15:19 1122 1122   ?    kmix [kdeinit] -session 10d8cecf960001110654581000000
                               6110 6062 S 08:15:19 1122 1122   ?    katapult -session 10d9d396680001126806606000000812800
                               6121   1 S 08:15:21 1122 1122   ?    knotes -session 10a7732d31000122174109400000061090019
                               6122 6062 S 08:15:21 1122 1122   ?    amarokapp -session 10a7732d31000122209443000000065940
                               6123 6110 S 08:15:21 1122 1122   ?    aspell -a -S -C -Tutf8 --encoding=utf-8
                               6129 6062 S 08:15:24 1122 1122   ?    konqueror [kdeinit] --preload
                               6131   1 S 08:15:25 1122 1122   ?    knotify [kdeinit]
                               6132 6062 S 08:15:25 1122 1122   ?    python /usr/bin/system-config-printer-applet-kde
                               6135   1 S 08:15:25 1122 1122   ?    klipper [kdeinit]
                               6137   1 S 08:15:25 1122 1122   ?    knetworkmanager [kdeinit]
                               6138 6062 S 08:15:25 1122 1122   ?    konqueror [kdeinit] --preload
                               6139 6062 S 08:15:25 1122 1122   ?    /usr/bin/python /usr/bin/kblueplugd
                               6144   1 S 08:15:27 1122 1122   ?    adept_notifier
                               6266 6062 S 08:23:22 1122 1122   ?    /usr/lib/firefox-3.0.1/firefox
                               6270   1 S 08:23:23 1122 1122   ?    /usr/lib/libgconf2-4/gconfd-2 12
                               7345 6062 S 10:08:59 1122 1122   ?    kio_file [kdeinit] file /tmp/ksocket-sheridanj/klaunc
                               7617   1 S 10:30:19 1122 1122   ?    /usr/lib/openoffice/program/soffice.bin -writer /home
                               7728 5066 S 10:48:13   0 root   ?    sshd: ait [priv]
                               7730 7728 S 10:48:15 1000 ait   ?    sshd: ait@pts/1
                               7731 7730 S 10:48:15 1000 ait   pts/1  -bash
                               7881 6062 S 10:52:27 1122 1122   ?    /usr/lib/firefox-3.0.1/firefox
                               7911 7731 R 10:53:30 1000 ait   pts/1  ps -eo pid,ppid,state,start,euid,euser,tty,args
                              Interestingly enough, on the client, I had a student Ctrl+Alt+F1 and log in using his normal login info and it worked fine. He was also able to create a folder and file in his working home dir. These tell me NIS and NFS appear to be working. He was also able to links to google.com fine.

                              I tried to restart kdm-kde4 on the workstation and it did give me a login screen with the NIS users. I was able to log in with a username and password (at least it did not fail) but the screen got stuck at the "wavy vlue background" for kdm-kde4.

                              I checked df and nothing is more than 8% full.

                              The server does seem to be functioning, but also seems to have heavy loads. Anything else I can check? The workstations are dead in the water as far as the GUI is concerned.

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