| ls | Show file list (in the current directory) |
| ls -l | Show a detailed file list (in the current directory) |
| mkdir dirname | Create a new subdirectory named dirname |
| cd dirname | Move from current directory to the directory named dirname |
| pwd | Print the full path of the current directory |
| cd .. | Go to the directory above the current one |
| cd | Go back to your main (home) directory |
| more filename | Show the file filename on the screen, page at a time (press space to scroll) |
| cp file1 file2 | Copy file1 to file2 |
| cp filename dirname/ | Copy the file filename into the subdirectory dirname |
| cp * dirname/ | Copy all the files in the current directory to the subdirectory dirname |
| mv file1 file2 | Rename file1 to file2 |
| mv filename dirname/ | Move the file filename to a the directory dirname |
| rm filename | Remove (delete) the file filename |
| rm * | Remove all files from the current directory |
| rm -r dirname | Remove the directory dirname (with all its contents) |
| program > filename | Redirect the output from program program to the file filename |
| Control-c | Interrupt a running process (e.g. your Perl program) in the middle |
| lpr -Pprinter_name filename | Print the file filename on the laser printer printer_name |
| exit | Log out |