| ! | Repeats commands |
| alias | This allows the user view the current aliases |
| awk | This allows the user to search for a pattern within a file |
| cal | Displays a calendar |
| cat | Concatenate and prints files |
| cc | c compiler |
| cd | Changes directories |
| chgrp | Change group ownership for a file |
| chmod | Change file access permissions |
| chown | Change file owner and group |
| cmp | Compares two files |
| comm | Compares two files so as to determine which lines are common to both |
| cp | Copies file to another location |
| date | Print or set the system date and time |
| df | Report filesystem disk space usage |
| diff | Find differences between two files |
| du | Estimate file space usage |
| echo | Display a line of text |
| env | Lists the current environment variables |
| ex | Another text editor |
| expr | Evaluate expressions |
| file | Determine file type |
| find | Search for files in a directory |
| grep | Searches for a pattern within a file |
| help | Gives help |
| kill | Terminate a process |
| last | Show listing of last logged in users |
| ln | Make links between files |
| lpr | copies the file to the line printer |
| ls | List directory contents |
| mail | Allows the user to send/receive mail |
| mkdir | Make directories |
| more | Displays a file to the screen |
| mv | Used to move or rename files |
| nohup | Allows a command to continue running even when you log out |
| nroff | Used to format text |
| passwd | Change user password |
| ps | Lists the current processes running |
| pwd | Print name of current/working directory |
| reset | Reset the terminal |
| rm | Remove files or directories |
| rmdir | Remove empty directories |
| sed | A stream editer for filtering output |
| set | Lists all the variables in the current shell |
| setenv | Change or add an environment variable |
| sleep | Delay for a specified amount of time |
| sort | Sort lines of text files |
| source | Allows the user to execute a file and update any changed values in that file |
| split | Split a file into pieces |
| stty | Change and print terminal line settings |
| tail | Output the last part of files |
| talk | Talk to another user |
| tar | Copies all specified files into one |
| tee | Read from standard input and write to standard output and files |
| top | Display top CPU processes |
| touch | Creates an empty file or updates the time/date stamp on a file |
| troff | Format documents |
| tset | Sets the terminal type |
| umask | Specify a new creation mask |
| uniq | Remove duplicate lines from a sorted file |
| uptime | Tell how long the system has been running. |
| uucp | Unix to unix file copy |
| vi | Full screen editor |
| wc | Print the number of bytes, words, and lines in file. |
| who | Show who is logged on |
| write | Send a message to another user |