The basic form of commands : command_name [options] argument(s)
- UNIX/Linux is case-sensitive.
File Handling Commands
| Command | Task |
| mkdir | make directories |
| ls | list contents in the directory |
| cd | change directory |
| cp | copy files or directories |
| pwd | print path of current working directory |
| mv | move or rename files |
| rm | remove files or directories |
| find | search for files in the directory herarchy |
| chmod | change permission of files or directories |
Displaying files
| Command | Task |
| cat | display the contents of a file on the standard output |
| more | display the contents of the file |
| head | display the first 10 lines of the file |
| tail | display the last 10 lines of the file |
| grep | print lines matching a pattern |
Miscellaneous Commands
| Command | Task |
| ps | report a snapshot of the current processes |
| kill | kill a process with PID |
| du | estimate file space usage |
| df | report filesystem disk space usage |
| man | show the manual of command |