Linux Administration Handbook, Second Edition

3.6. Exercises

E3.1	Use the find command with the -perm option to locate five setuid files on your system. For each file, explain why the setuid mechanism is necessary for the command to function properly.
E3.2	Create three “shocking nonsense” passphrases but keep them to yourself. Run your three passphrases through md5sum and report these results. Why is it safe to share the MD5 results?
E3.3	Enumerate a sequence of commands ...