To see what file systems are currently mounted, where, and with what options, issue the mount command without arguments:
/dev/hda5 on /home type ext3 (rw,acl)
Recently, I wanted to tell the file system not to track the last access time (atime) of files under /home. I did not have any good use for the last access time. So, I opted to disable its tracking to reduce disk activity and save a few watts. This is accomplished through adding the mount option noatime.
To change the mount option for /home:
- Edit /etc/fstab as root.
- Add the option noatime to the line that corresponds to /home:
/dev/hda5 /home ext3 defaults,acl,noatime 0 2
- To make the change effective, you can either reboot (to which you sneer) or you can remount /home.
To remount a file system, say /home, with new mount options at run-time, issue a command like this:
$ mount -o remount,noatime /home
There you have it. You can now feel good about saving a few watts, and be the hero in saving the environment.