| cd | change directory |
| pushd | flip between two different directories |
| cp | copy |
| mv | move |
| rm | remove and erase |
| ls | list what is in the directory |
| ls -l | list what is in directory with more detail |
| pwd | find out where you were |
| mkdir | make new directory |
| chown | change owner |
| chown -R | change owner of everything in specified directory |
| su | switch user |
| chgrp | change group ownership |
| chgrp -R | change group ownership of everything in specified directory |
| diff | compare two files |
| Ctrl + Z | suspends program |
| fg | reactivates program/brings suspended back into foreground |
| ls -alt | lists permission of all files in a directory |
| chmod | changes permissions depending on what numbers you put in using chmod ### filename command. See table below for permission numbers. |
| wc | count number of lines, words, and characters in a (text) file |
| # | Permission |
| 7 | full |
| 6 | read and write |
| 5 | read and execute |
| 4 | read only |
| 3 | write and execute |
| 2 | write only |
| 1 | execute only |
| 0 | none |
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