Bob Proulx wrote:
John Lindsay wrote:
John Lindsay wrote:
I just did a google on my little problem and found this
rm -fr /home/user/.trash
That seemed to clean out trash however checking the size of
available space shows no increase in space. I had 24G free
originally and despite deleting some 20G of folder/files, I
expected to see 44G of free space available.
Well, I guess it really helps to do some digging -- found this
find -name '*rash'
and it seemed to give me every instances where trash is located. I
looked at each file and they are empty. I guess I was mistaken in
figuring I could gain an extra 20G of space.
A typical problem is that someone will have have large logfile from a
running process. They remove the file. That doesn't free up space
because a process is still running and writing to it. The file can
only really be removed when the reference count to it goes to zero.
I don't know if that is your problem or not. It might be. It might
not be. But if you happen to have any running processes that are
still talking to a very large file then removing the file won't help.
I always recommend finding big files and truncating them first. You
can truncate a file using the shell by redirection nothing into it.
: > largelogfile.log
Or you can use 'true' as the same thing since ':' is an alias for
'true'. So shell programmers always tend to use : since that is the
traditional value. It isn't obvious to new people though.
Of course one way to guarantee that no processes are still running is
to reboot. A little harsh. But effective.
Also a place where disk space is often lost is in the apt package
cache /var/cache/apt. You can clean up old cached files there with:
# apt-get clean
A useful tool to determine where disk space has gone is the du
visualizer 'xdu'.
apt-get install xdu
Then run it on du output. It will take a while for du to run across a
large filesystem so some patience while it collects data is useful.
du -xm / | xdu
I usually redirect the du output to a file and let it run then after
iti s done run xdu on the file.
du -xm / | tee /tmp/du-xm.out
xdu < /tmp/du-xm.out
Click the mouse left button on the areas to explore. It is somewhat
interactive. Simple. But quite useful.
There are a number of different disk space visualizer programs
available such as filelight and others but xdu is the most mature and
simplest of them.
Good info. Thanks.
Hugo
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