[SOLVED] xsession warning unable to write to tmp

[rooted]

hi fellas. technically im facing a little problem that maked me awake all night since yesterday tryna solve it. i really crawled the webs before posting this thread but all of them explains other cases not like mine.so when i boot my system (basic os) that message pop-up to me again. tbh it happened last month and i tab this commands into the root account to clean my cache files and the unused packages and it already works:

 apt-get autoclean ~ apt-get clean ~ apt-get autoremove

here's some info at my drive:

root@kali:~# df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            975M     0  975M   0% /dev
tmpfs           201M  1.4M  200M   1% /run
/dev/sda1        11G   11G     0 100% /
tmpfs          1003M   12M  991M   2% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           4.0M     0  4.0M   0% /sys/fs/cgroup
/dev/sda6        62G  8.5G   50G  15% /home
tmpfs           201M   60K  201M   1% /run/user/0

also this command shows that the /dev/sda1 is 100% which it means it can?t write to a full disk:

root@kali:~# df -h /tmp
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1        11G   11G     0 100% /

any solution for this case? and thank you all

[jlittle]

I'm mildly surprised the system runs at all, with the root device at 100%.
You may have to boot in recovery mode, or from a live USB.
I suggest you identify what has filled up /, and delete some of it. BTW, a backup of anything important could be precious. If you've done a reboot it probably won't be in /tmp, because that's normally cleared when booting. If I didn't have a strong suspicion of a culprit I'd look first in /var/log.

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[claydoh]

So you have to uninstall some [programs and other software or packages, to give yourself some breathing room. 11Gb is not much for an OS these days.

[rooted]

I'm mildly surprised the system runs at all, with the root device at 100%.
You may have to boot in recovery mode, or from a live USB.
I suggest you identify what has filled up /, and delete some of it. BTW, a backup of anything important could be precious. If you've done a reboot it probably won't be in /tmp, because that's normally cleared when booting. If I didn't have a strong suspicion of a culprit I'd look first in /var/log.

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hi, ty for your reply
the live booting method may wipe my data. but if i locate the excess usage it will be fixed just by making a free space on the bootable disk
checkout this output:

root@kali:~#  du -h --max-depth=1 /var
387M    /var/lib
24K     /var/spool
5.7M    /var/backups
4.0K    /var/mail
1.1G    /var/log
4.0K    /var/local
36K     /var/www
52K     /var/tmp
4.0K    /var/opt
70M     /var/cache
1.5G    /var

[rooted]

So you have to uninstall some [programs and other software or packages, to give yourself some breathing room. 11Gb is not much for an OS these days.

oh yes this was my bigger mistake i partisioned the root a tiny space than the user partition. i tried with gparted and it can't be shrinked yet i need a way to track the problem that makes the root full

[jglen490]

In reality, your /var directory is not at all out of bounds:

[john@john-HP-ENVY-x360 john]$ sudo du -h --max-depth=1 /var
4.0K    /var/metrics
132K    /var/spool
4.0K    /var/local
7.3M    /var/crash
192M    /var/cache
4.0K    /var/mail
801M    /var/log
358M    /var/lib
5.7M    /var/backups
4.0K    /var/opt
60K     /var/tmp
1.4G    /var

The real problem is the size of the / partition. Yours is 11GB, the least it probably should be is twice that

What version of Kubuntu are you running? Can you grab some more space, perhaps with a reinstall? Can you rsync your /home to an external drive?

[claydoh]

1.1G    /var/log

This can be reduced from the recovery console, and give you some room for a short bit, if you need to boot up right away:

https://ubuntuhandbook.org/index.php...l-logs-ubuntu/

[rooted]

In reality, your /var directory is not at all out of bounds:

[john@john-HP-ENVY-x360 john]$ sudo du -h --max-depth=1 /var
4.0K    /var/metrics
132K    /var/spool
4.0K    /var/local
7.3M    /var/crash
192M    /var/cache
4.0K    /var/mail
801M    /var/log
358M    /var/lib
5.7M    /var/backups
4.0K    /var/opt
60K     /var/tmp
1.4G    /var

The real problem is the size of the / partition. Yours is 11GB, the least it probably should be is twice that

What version of Kubuntu are you running? Can you grab some more space, perhaps with a reinstall? Can you rsync your /home to an external drive?

well i am currently using kali linux 2020.4 i posted here cause the community of kali is dead in the forum but all of them based on debian tho. thanks btw for your help i solved the problem now everything is okay

[rooted]

1.1G    /var/log

This can be reduced from the recovery console, and give you some room for a short bit, if you need to boot up right away:

https://ubuntuhandbook.org/index.php...l-logs-ubuntu/

when you take a deep breath and think a smart the life is become easy as well. i solved the problem by clearing the cache/cookies in the browser, cleaning the /root/cache/ by:

apt-get autoremove && apt-get clean

for my case my dev/ada1 has only 11G so i cant install a third party program for auto-clearing the unused data but for everyone who has the same issue and had a big space on the root i would suggest bleachbit its good for cleaning, anyway thanks for your help :-)

[jlittle]

I don't know if it's a starter with kali, but I left partition size problems behind by using btrfs subvolumes, with all my installs, including non-Ubuntu like gentoo, in the same fs.

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[jglen490]

@rooted, glad you got yourself going again. So be very watchful of your Kali installation. Too bad you can't grab some extra space from whatever is between sda1 and sda6, but I understand. Good luck

[oshunluvr]

You might consider shrinking your /home partition by 3GB (or whatever) and creating a new partition and mount it as /var. This would effectively add space to /