[SOLVED] Trying to upgrade Kubuntu LTS

cfl · 11-01-2018, 09:45 PM

Wanted to install updates and upgrade Kubuntu LTS to 18.04, but updates act weird (starts to update, then says it's up to date, then says can't download) and trying to upgrade starts process then gives error "No space left on device". So I ran df -h

Code:

Filesystem      Size  Used Avail Use% Mounted on
udev            1.4G     0  1.4G   0% /dev
tmpfs           288M  4.9M  283M   2% /run
/dev/sda5        12G   12G   15M 100% /
tmpfs           1.5G   22M  1.4G   2% /dev/shm
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           1.5G     0  1.5G   0% /sys/fs/cgroup
/dev/sda6        31G   12G   18G  39% /home
tmpfs           288M     0  288M   0% /run/user/118
tmpfs           288M   16K  288M   1% /run/user/1000

I see that root is out of space. Is 12G insufficient or some cleanup I can do? Most everything I added was installed to home. I don't see any mention anywhere of how much space is required to upgrade.

berndbausch · 11-01-2018, 10:28 PM

To me, 12GB for root is a bit tight. You will have a lot of stuff in /var, and perhaps need some non-negligible temporary space for the upgrade (usually /tmp or /var/tmp).

Kubuntu should have roughly the same space requirements as Ubuntu. The disk space is stated as 25gb minimum. Thus, your setup is illegal :P

Not sure if you can trim anything. It might be easier to backup the whole thing and reinstall with a larger root disk, or combine root and home on the same disk.

mrmazda · 11-01-2018, 11:13 PM

Largest / partition I've assigned to Kubuntu is 8G. Most I've given 5.6G or less. Your apt cache probably still has every package ever upgraded, so start by emptying it and see how much freespace remains. If you have /var/log/journal/*/ likely it consumes a lot of space with ancient useless files. Try getting rid of all but the most recent. /tmp is another place to check.

cfl · 11-02-2018, 10:08 PM

@berndbausch - I thought the 25gb size was for root and home combined.

@mrmazda - clearing apt cache now gives me 383 MiB free. Don't have /var/log/journal/*/ & /tmp contains a minuscule amount, so not worth cleaning.

Found https://www.omgubuntu.co.uk/2016/08/...pace-on-ubuntu
I do have some old kernels. Running sudo apt-get autoremove --purge shows:
After this operation, 1,865 MB disk space will be freed.
That's a significant chunk. Haven't actually removed them yet; safe?

berndbausch · 11-03-2018, 12:27 AM

Quote:

Originally Posted by cfl

@berndbausch - I thought the 25gb size was for root and home combined

Nobody except the person who installs the system knows how much space is needed in /home, so that I doubt that. Having said that, the 25GB should contain a safety buffer.

For a clue where to trim: apt should allow you to create a report of the size of everything you installed. Compare that to the disk space actually allocated (you could use du for that, or perhaps there are graphical tools built into Kubuntu).

mrmazda · 11-03-2018, 01:22 AM

Quote:

Originally Posted by cfl

@mrmazda - clearing apt cache now gives me 383 MiB free...
Found https://www.omgubuntu.co.uk/2016/08/...pace-on-ubuntu
I do have some old kernels. Running sudo apt-get autoremove --purge shows:
After this operation, 1,865 MB disk space will be freed.
That's a significant chunk. Haven't actually removed them yet; safe?

Yes. All you need is the kernel that is now running, which autoremove won't disturb. The 383 freed by the cache cleaning would not have left enough space for downloading the updates. With all those ancient kernels removed, dist-upgrade may have enough freespace to proceed. If it doesn't, look through your menu starter. Likely there are things in there you never use that can be uninstalled.

ondoho · 11-03-2018, 03:56 AM

cfl, your (only) hard drive seems to be so small, i would drop any partitioning schemes and go with 2 partitions (3 if you have EFI boot?) only:
/ (incl. home) and swap.

cfl · 11-03-2018, 07:23 PM

Got those old kernels removed. Still not enough space. I really like having a separate data (home) partition. KDE Partition Mgr. to the rescue: moved 6 GiB from home to root. Success! (Posting from 18.04) My HD is not really that small; I dual boot Win7. I have a Win7 partition with extra space, but using it would have entailed a lot more moving things around (which, aside from any risk, is dreadfully slow and I didn't want to get into that right now). Showing 11G free in root after upgrade, so actually acquired more free space after upgrade.
Thanks!