The basic steps are:

1. Edit _/etc/fstab and add the option to turn on user quotas (_usrquota) for the opt directory filesystem (_/opt). Be very careful with this step, as a corrupted fstab file will prevent your system from booting normally. As a safeguard, make a copy of /etc/fstab, calling it, for example, /etc/fstab.bak. This will make recovery easier.

2. Remount the filesystem so that the new options from fstab take effect. A useful command to remount a filesystem when you have changes the options is below (for the _/opt filesystem in this case):

mount –o remount /opt

3. Run the _quotacheck command for the /_opt filesystem.

4. Turn quotas on with the _quotaon command (this command needs an argument – read the man entry if in doubt)

5. Use _edquota to edit _peter's disk quota. For block usage, set a soft limit (warning) at 400KB and a hard limit at 500KB. You do not need to set limits on inodes (which is a limit on the number of files a user can create).

Test that your disk quotas are working by logging in as the user _peter, and trying to store more than 500KB in the /opt directory (copy a large file from somewhere else). You may need to create a directory under /opt and make it so that

peter can write to that directory (either make him the owner, or change the directory permission). Hint: an easy way to create a large file is to use the dd command, for example, dd if=/dev/zero of=junk bs=1024 count=600 You can also run the _{quota –v} command while logged in as _peter to show the quota values for _peter.

As root, run _repquota to generate a quota report for the _/opt filesystem.

Carefully document the process you followed, including all of the options to the commands. Also document your testing procedure, and what messages the system showed when the user exceeded his soft limit and his hard limit.