How is the
/tmp directory cleaned up? Is it automatic? If so, how frequently is it cleaned up?
The cleaning of
The script does roughly the following: if a file in
The default value of
The directory is cleared by default at every boot, because
Here you can change the time in the following file:
While the /tmp folder is not a place to store files long-term, occasionally you want to keep things a little longer than the next time you reboot, which is the default on Ubuntu systems. I know a time or two I’ve downloaded something to /tmp during testing, rebooted after making changes and then lost the original data again. This can be changed if you’d like to keep your /tmp files a little bit longer.
Changing the /tmp Cleanup Frequency
The default setting that tells your system to clear /tmp at reboot is held in the /etc/default/rcS file. The value we’ll look at is TMPTIME.
The current value of TMPTIME=0 says delete files at reboot despite the age of the file. Changing this value to a different (positive) number will change the number of days a file can survive in /tmp.
This setting would allow files to stay in /tmp until they are a week old, and then delete them on the next reboot. A negative number (TMPTIME=-1) tells the system to never delete anything in /tmp. This is probably not something you want, but is available.
On one of our servers running Ubuntu, we have a script to remove files in /tmp and it runs nightly.
The script is:
Just save the contents above to a file chmod 775 the file and create a cron entry to run it. Since this is a web server we don't want to reboot it for obvious reasons.
protected by Community♦ Feb 11 '15 at 14:09
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