I'm not sure what is triggering it -- it may be IRB, rails, or a gem that we have, but there is a constant stream of these messages on stderr when the rails console ('rails c') is loaded: [email protected] 3.2.0-86.123 ..
# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 7.4G 7.0G 0 100% / none 498M 160K 498M 1% /dev none 500M 0 500M 0% /dev/shm none 500M 92K 500M 1% /var/run none 500M 0 500M 0% /var/lock none 500M 0 500M 0% /lib/init/rw /dev/sda3 917G 305G 566G 36% /home This is puzzling me for two reasons: 1.) df says that /dev/sda1, mounted at /, has a 7.4 gigabyte capacity, of which only 7.0 gigabytes are in use, yet it reports / being 100 percent full; and 2.) I can create files on / so it clearly does have space left.
Possibly relevant is that the directory /www is a symbolic link to /home/www, which is on a different partition (/dev/sda3, mounted at /home).
This is an annoying problem on a lot of Linux distributions, and it can have several causes.
If you delete files from the filesystem, the command "df -h" might not show the deleted space as being available.
On Linux deleted yet open files are known to lsof and marked as (deleted) in lsof's output.