Basic Linux commands
| rm <file> | remove | 
| ls | list | 
| mkdir <directory> | make directory | 
| mv <source> <destination> | move directory | 
| rmdir <directory> | remove directory | 
| cd <directory> | change directory | 
| cp <origin> <destination> cp -r <origin> <destination> | copy All the items in a directory | 
| touch <file name> | create timestamp | 
| cd .. | change directory go up | 
| ./<file name> | run the program in directory | 
| pwd | present working directory |