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Top Forums UNIX for Advanced & Expert Users Files disappearing from /users/home Post 302506938 by jim mcnamara on Tuesday 22nd of March 2011 10:13:12 AM
Old 03-22-2011
It is probably a process designed to clean up old files. Since it works across users, it has to have permissions. If we assume the files in question are 755 permissions, this means it has to run in a crontab owned by a user that is allowed su or sudo. Or is root to start with.

To verify this assumption, consider setting 000 permisions on some dummy files in the directory trees in question. Use the same naming conventions, ownerships, file sizes and file times as the ones that got clobbered. If the dummy file(s) are removed it has to be a priviliged user.

What this does is limit the number of crontabs to read. If the assumptions are good start grepping the crontabs for jobs that run at the time in question, limit the search to just privileged crontab files.

If all users have cron access, then you may have a script that a weak programmer wrote that everyone has shared. Good luck with that.

If you have linux consider, the inotify family. http://linux.die.net/man/7/inotify You can interactively watch for deletions in the directory trees in question.
 

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SSS_USERDEL(8)							 SSSD Manual pages						    SSS_USERDEL(8)

NAME
sss_userdel - delete a user account SYNOPSIS
sss_userdel [options] LOGIN DESCRIPTION
sss_userdel deletes a user identified by login name LOGIN from the system. OPTIONS
-h,--help Display help message and exit. -r,--remove Files in the user's home directory will be removed along with the home directory itself and the user's mail spool. Overrides the configuration. -R,--no-remove Files in the user's home directory will NOT be removed along with the home directory itself and the user's mail spool. Overrides the configuration. -f,--force This option forces sss_userdel to remove the user's home directory and mail spool, even if they are not owned by the specified user. -k,--kick Before actually deleting the user, terminate all his processes. THE LOCAL DOMAIN
In order to function correctly, a domain with "id_provider=local" must be created and the SSSD must be running. The administrator might want to use the SSSD local users instead of traditional UNIX users in cases where the group nesting (see sss_groupadd(8)) is needed. The local users are also useful for testing and development of the SSSD without having to deploy a full remote server. The sss_user* and sss_group* tools use a local LDB storage to store users and groups. SEE ALSO
sss_groupadd(8), sss_groupdel(8), sss_groupmod(8), sss_groupshow(8), sss_useradd(8), sss_usermod(8). AUTHORS
The SSSD upstream - http://fedorahosted.org/sssd SSSD
03/04/2013 SSS_USERDEL(8)
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