File Management
- ls – List files and folders
- cd – Change directory
- pwd – Present working directory
- mkdir – Make a new empty directory
- rmdir – Remove an empty directory
- cp – Copy files or directory
- rm – Remove files or directory
- mv – Move files or directory / Rename files or directory
- find – Find files or folders bases on name, data, size, owner or other parameters
- touch – make a new blank files
Permissions
- chown – Change ownership of files / directories
- chgrp – Change group ownership of files / directories
- chmod – Change permission of files / directories
- groups – Reports the groups you belong to
- id – Reports your username, user-id, group(s) and groupid(s)
Resource Monitoring
- w – See who logged in on your system and what they are doing.
- who – See who logged in on which shell and time.
- uname – display the system information like(machine name, version, hostname).
- hostname – display your system hostname.
- top – See the top resource hungry processes.
- ps – Process schedule / status.
- df – See how much disk space is free.
- du – Report numbers and size of files on disk.
Printing
- lpr – send text or post script files to the printer.
- lpq – view the print queue.
- lprm – Remove your print jobs.
Job Control
- whereis – Display full path and installation path of commands.
- which – Display the full path of commands.
- ctrl+z – Suspend the current job
- bg – Put a suspended job in the background.
- fg – Bring a suspended job into the foreground.
- kill – Kill a process
Filtering/Searching
- grep – Search for sub strings in a file or pipeline.
- awk – Pattern searching in a folder or within a file.
- sed – Sed is a Stream Editor used for modifying the files in unix (or linux). Whenever you want to make changes to the file automatically.
- sort – Sort lines alphabetically or numerically.
- wc – Count lines, word and characters.
- cat – Catalog a file.
- more – Teminal bases text viewing program.
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