Sep 092015
 

ANSI codes are embedded byte commands that are read by command-lines to output the text with special formatting or perform some task on the terminal output. The ANSI codes (or escape sequences) may appear as character codes rather than formatting codes. Terminals and terminal-emulators (such as Xterm) support many ANSI codes as well as some vendor-specific codes. Learning about ANSI may help terminal users to understand how it all works and allow developers to make better programs.

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ANSI Codes and Colorized Terminals
ANSI Codes and Colorized Terminals
Source: Linux.org