Directory Permissions on /tmp
It is possible that during ZCS install, if the /tmp directory does not have the correct permissions, it could hinder your efforts to install ZCS.
Make sure the /tmp directory has the following permissions.
drwxrwxrwt 17 root root 4096 2008-07-07 08:33 tmp
If your /tmp permissions do not match the above, run the following commands as root:
# chmod 777 /tmp # chmod +t /tmp
The "t" in the end of the permissions is called the "sticky bit". It replaces the "x" and indicates that in this directory, files can only be deleted by their owners, the owner of the directory or the root superuser. This way, it is not enough for a user to have write permission on /tmp, he also needs to be the owner of the file to be able to delete it.
More articles written by me, https://wiki.zimbra.com/wiki/King0770-Notes