I am on Mint XFCE and Redshift is just so inconsistent and I have tried its forks, also inconsistent. So instead I have been using sct in the terminal to adjust the temperature, and have set a command that resets it back to normal every time that I log on. However, I was wondering if there is a way to make it so that “sct 2750” runs every day at 10 pm or during a specific period of time.
So I attempted to run a crontab and for whatever reason it does not do anything. What I put was * * * * * /usr/bin/sct 2750 after sudo crontab -e just to see if it even runs but it does not do anything. I rewrote and added multiple crontabs but no results. Any help would be appreciated.
For the “schedule expression” (the
* * * * *part), try https://crontab.guru/. Some distributions have shortcut expressions like@hourlyor@dailyso you don’t have to type* */1 * * *etc.The crontab generally has a header that shows the columns, but if not, they’re:
m h dom mon dow command.From
* * * * * /usr/bin/sct 2750I’m guessing you want to run every minute. If that’s the case, as another commented pointed out, try*/1 * * * * /usr/bin/sct 2750, meaning every 1 minute.OK… So, just to test, edit your crontab and run a basic command:
*/1 * * * * date >> ~/date.logthis will append the current date/time once a minute (
*/1) to a file in your home dir. You can check if it works withcat ~/date.logIf that works, then try again with your command. I see you used the full path to it, that’s a good thing. Also, what does that command do if you run it manually?
To run the command at 10 PM every day, you should have it like this:
0 22 * * * /usr/bin/sct 2750