About automatic deletion of files under Linux tmp

Recently found that there is a machine tmp placed under the innocent loss of files, and the detection is automatically lost, and, just delete files 10 days ago ....

I thought it was the one who wrote an auto-execute script, find the file deleted 10 days ago ....

As a result, the crontab schedule for all users is cleared, and no user has executed the automatic script

Monitored the server login, and no one logged in during the deletion of the file

Finally, through unremitting Baidu, finally found a positive solution

It is found from the/var/log/cron log that the server executes its own system in addition to the user's scheduled tasks, such as:

/etc/cron.hourly

/etc/cron.daily

Enter/etc/cron.daily

Can see a Tmpwatch

Cat Tmpwatch

Flags=-umc

/usr/sbin/tmpwatch "$flags"-x/tmp/. X11-unix-x/tmp/. Xim-unix \

-x/tmp/.font-unix-x/tmp/. Ice-unix-x/tmp/. Test-unix 240/tmp

/usr/sbin/tmpwatch "$flags" 720/var/tmp

For D In/var/{cache/man,catman}/{cat?,x11r6/cat?,local/cat?}; Do

If [-D "$d"]; Then

/usr/sbin/tmpwatch "$flags"-F 720 "$d"

Fi

Done

You can see that a script called Tmpwatch is called, and we can see that the incoming parameters are meaningful to us./tmp 240

And then we man Tmpwatch

Synopsis

Tmpwatch [-u|-m|-c] [-MUADFQSTVX] [--verbose] [--force] [--all]

[--nodirs] [--nosymlinks] [--test] [--fuser] [--quiet]

[--atime|--mtime|--ctime] [--dirmtime] [--exclude <path>]

[--exclude-user <user>]

There is a hours

240 = 10*24 The whole good is 10 days

The specific reason is that TMP is a special folder, the system will automatically clean up, so it is best not to put the files in this place, was cleaned up is not good

About automatic deletion of files under Linux tmp