The document contains summaries of common Linux/Unix commands and their functions:
- ls lists the contents of a directory. ls -al shows hidden files and more details.
- cd changes the current directory.
- mkdir creates a new directory.
- rm removes (deletes) a file. rm -r removes a directory and all its contents.
- cp copies a file or directory.
- mv renames or moves a file or directory.
- cat outputs the contents of a file.
- head/tail outputs the start/end of a file. tail -f outputs adding content to a file.