- Finding information about the system
- command2, Performing more than one command , Finding information about the system
- commandName, The command-line history
- commas, Text manipulation tools , Mathematical tools , Scheduling Commands to run in the background , Standard Wildcards (globbing patterns)
- Commmand, Finding files
- common, Text Information Tools , Text manipulation tools , Compression , Scheduling Commands to run in the background
- commonly, General Shell Tips
- compares, Text Information Tools
- complete, Who would not want to read this guide? , General Shell Tips
- completions, General Shell Tips
- complex, Introduction , The Unix Tools Philosophy , General Shell Tips , Text Viewing Tools , Text manipulation tools , Miscellaneous
- complicated, Network Commands
- composite, Graphics tools (command line based)
- comprehensive, Who would want to read this guide? , Security
- compress, Compression
- compressed, Text Viewing Tools , Compression
- compression, Compression
- Comptechdoc's Linux Command Quickreference, General Further Reading
- computer, Finding information about the system , Remote Administration Related , Scheduling Commands to run in the background
- computers, Network Commands
- concatenate, Usage
- Concatenates, Usage , Text manipulation tools
- concepts, Disclaimer , Mini-Guides
- configuration, Network Configuration , Security
- configure,

