- copy, License , General Shell Tips , Finding files , Working with files and folders , Remote Administration Related , Miscellaneous
- copying, General Shell Tips , Working with files and folders
- Copyright, License
- copyrights, Disclaimer
- core, The Unix Tools Philosophy
- coreutils, The UNIX tools philosophy further reading
- correct, Contributors , Controlling Processes , Mathematical tools , Some basic Security Tools , Compression , Graphics tools (command line based)
- correctly, Internet Specific Commands
- cost, Compression
- count, Working with files and folders , Text Information Tools , Text manipulation tools
- cp, Working with files and folders
- CPU, Finding information about the system , Controlling Processes
- crackers, Internet Specific Commands
- criteria, Miscellaneous
- critical, Controlling services
- criticism, Feedback , Contributors
- criticisms, Contributors
- cron, Scheduling Commands to run in the background
- crontab, Scheduling Commands to run in the background
- cryptic, RPM: Redhat Package Management System
- CSS, Contributors
- CTRL-A, Other Key combinations , Virtual Terminals and screen
- CTRL-ALT-DEL, Shutting Down/Rebooting the System
- CTRL-ALT-F*, Virtual Terminals and screen
- CTRL-C, Shutting Down/Rebooting the System , Controlling Processes , Text Viewing Tools , Network Commands
- CTRL-D, General Shell Tips ,

