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I've set the TERM variable value to linux-m to have a monochrome terminal. What's peculiar it doesn't changed anything - when i issue ls -l or grep --color i still get colorized results. Why does it returns colors if the terminal is no-color?

For previous information on this see Changing TERM variable and color output. It's related but has another focus.

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Each command (program) has its own options and they override common options of terminal at all.


By steps:

1. to have monochrome prompt

Open your ~/.bashrc file. Find strings begins from PS1=, PS2=, PS3=, PS4= and comment them (place # at the beginning).

2.1 to have monochrome ls output

Find file ~/.dircolors and rename it to ~/.dircolors_old

2.2 to have monochrome grep output

grep takes its colors from environment variable GREP_COLORS (deprecated GREP_COLOR). It might be set in ~/.bashrc. You should comment it too.

  • PS1 only controls the prompt, how would this help the questioner solve his problem? – mtak Jan 29 '18 at 12:13
  • updated answer.. – Drakonoved Jan 29 '18 at 12:26
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    All the PS variables are just for controlling prompts... Maybe it would be easier if you added how would this help? – mtak Jan 29 '18 at 12:57
  • updated answer.. – Drakonoved Jan 29 '18 at 13:42
  • And .dircolors only works for ls output. grep --color will still have colored output with your answer. I'm pretty sure the questioner wants a universal solution for his problem. – mtak Jan 29 '18 at 14:15

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