| UNIX essentials (hands-on) |
| "The Directory Tree" |
| "every directory has a parent..." |
| "The Shell:" |
| "Special Characters" |
| "Command Types" |
| "Shell Variables" |
| "variables can be assigned the..." |
| "Environment Variables" |
| "Wildcards" |
| "Shell Scripts" |
| "Some Shell Commands (handled..." |
| "More Shell Commands:" |
| "Pipes and Redirection" |
| "Some OS Commands" |
| "* grep" |