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I am running Red Hat Enterprise Linux 7.4. I have done a minimal install so that I don't have X11, xorg, xset or anything x related installed. I am trying to keep the monitor from going blank. When I log in I can run the following command which does the trick:

setterm -blank 0 -powerdown 0 -powersave off

However, when I put that in a script to run at boot time (I call the script from rc.local for now) it doesn't work. I am trying to keep the screen on even before a login. Any suggestions?

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At least the first two parts are realised by sending an escape sequence to the console handler, as can be demonstrated like this:

$ setterm -blank 0 -powerdown 0 | od -c
0000000 033   [   9   ;   0   ] 033   [   1   4   ;   0   ]
0000015

The easiest way of doing this automatically is to add this output to the file /etc/issue which is sent to the screen before the login: prompt:

# setterm -blank 0 -powerdown 0 >> /etc/issue

Now the escape sequence is always sent to the screen.

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