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I use xgamma -gamma 0.7 but when I restart the computer I need to write that command again.

from this question link

Tom Tom
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2 Answers2

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You can't do it "permanently", but you can redo the setting at every GUI login by putting a .desktop file in $HOME/.config/autostart/.

Look at examples in /etc/xdg/autostart/

waltinator
  • 37,856
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You can edit $HOME/.bashrc and add the line below.

xgamma -gamma 0.7

Then each time you login, the command is executed.