Hi everyone
I'm a new user here and to Linux
and here goes my first question

I have recently installed KDE plasma on my Kali, and it's great
but I have an issue that it reset its screen res to default every time I log in
I have tried different way to go about fixing this, but it didn't work
it doesn't bother me
I've made an alias for it using xrandr, and I change it every time in a sec
but what I don't understand is why my @reboot command in crontab don't work

this is my code
@reboot xrandr -s 5
and I made another code using my alias
@reboot res
and it says installing new crontab or whatever in my terminal
but neither work and nothing happens at reboot

What am I missing here?

Thanks guys

Does show it? Look at /var/log/cron for evidence of it trying to work. I put reboot stuff in /etc/rc.d/rc.local
(may be different on your system).

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additionally use full path in crontab.
https://www.linuxquestions.org/quest...ad-4175614092/

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Doesn't @reboot work only if you actually reboot and not from a cold boot? Are you actually doing a shutdown -r now or reboot or coming from a cold shutdown?

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cron jobs are normally not associated directly with the desktop as if running when actually logged in. Try

@reboot DISPLAY=:0 xrandr -s 5

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Thanks a lot, guys

Please tell us what worked. I should have mentioned that the only environment variables supplied to a cron job are $HOME and a limited path, just /bin:/sbin:/usr/bin:/usr/sbin as I remember, not the path I have in /etc/profile or other initialization files. When I call a script via crontab the first command sets my usual path.