/usr is closed to 90% full

[Teck Sim]

What files under /usr can I safely delete?
Thanks.


T. SIM

[Pete Randall · Accepted solution]

1. Make sure you have a backup.

2. Anything under /usr/tmp is probably fair game.

3. The same should be true for /usr/examples.

Anything else is probably risky.

Check for core or large user files that may have snuck in.

Other than that, you'll probably need to enlarge it.

HTH,
Pete

[S.K. Chan]

If you look closely ..
# ls -l /usr|grep -e "->"
there are some sym link directories that goes to /var
like /var/mail; /var/spool.. at least on my machine. That leaves nothing much behind for you to house keep.

- /usr/tmp

is about all I would cleanup.

You would want to do 2 things though ..
# cd /usr
# find . -name core -exec ls -l {} \;
==> list core files and if found remove them.
# find . -size +2000000c -exec ls -l {} \;
==> find out if you have any files bigger than 2MB (just an example) and see if those files really does belong here.

Other than that . 1 option
- extend /usr
You do not want to be moving system directories/files from /usr to some other location and create sym link to it.

[Sachin Patel]

Use find command to find core file

#find /usr -name core -print

to find a file of 10000000byte = 10MB or larger

#find /usr -type f -size -10000000c -exec ls -la {} \;

Sachin

[SHABU KHAN]

Hi,

I would first try to find out which files are taking up space in /usr

cd /usr
ls -lR | grep "^-" | sort -nr -k 5 | more

will list biggest first and so on ...

Hope this helps !

Thanks,
Shabu

[Martin Johnson]

You can do:
cd /usr; du -kx | sort -rn | more

This will show you usage by directory in the file system /usr.

If you need to exend /usr and it is a hfs file system, you will have to shut the box down complely, then boot in single user mode. Do a mount /usr; umount /usr, then do your extend and extendfs.

You can't just shutdown to single user mode. There are processes still running that use /usr.

[Michael Tully]

Hi,

Analysing /usr is a little different to some of
the other filesystems. You must rememeber that
some of the directories underneath here actually belong to /var and they are shown as symbolic links.

What I would do is actually look for any large files first as suggested, but look at how the
filesystem has grown. Since /usr generally does
not grow very much, now is the time to look at
planning to increase it. If you have a copy of the On-Line JFS software loaded, you can increase this on the fly. (Assuming JFS) If not
you will need an outage regardles.

Cheers
~Michael~

[Trevor Dyson]

In most circumstances /usr is fairly static and should not surprise you by growing rapidly.

Unless you need more space to install a patch or to install a new application then I would leave it alone.

Another thing to consider is the number of megabytes (shown as kb in bdf) free. This is a more important value than % free.

My 2c discalimer applies

[Teck Sim]

Thanks to all of you, all the info. has been very helpful.