About

Control characters are used to control the interpretation or display of text, but these characters themselves have no visual or spatial representation.

List

• Character - Null Character (NUL)
• Characters - Newline - End of Line ( EOL ) - Line Separators - Line Break
• Text - Carriage Return (CR) Character
• Character - Tabulation (Horizontal tab)
• …

How to see them?

cat -A file

• $ is \n
• ^M$ is \r\n
• ^I is TAB character

Documentation / Reference

• control characters