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I am wanting to run multiple scripts after boot up. When the machine boots up, one script would run and force a reboot. Then, after the reboot, another script would run and then reboot. Need this to happen about four times. Is this possible?

pa4080
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noobuntu
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  • Yes it is possible. You could save the current status of the system into a log file. Then a master script could read the last written status and run conditionally a certain script of the bundle. – pa4080 Aug 06 '20 at 15:58
  • I like that answer a lot. That's an interesting way to go about this. So, I'm thinking I could then just take all four scripts and combine into one with a conditional response for each set of commands. how would I create the log file so that it changes after each reboot and then how would I refer to the log file? Sorry. Really trying to wrap my head around the idea of automation using bash scripts. I really appreciate the direction – noobuntu Aug 06 '20 at 17:53
  • I've converted my comment into an answer with example. – pa4080 Aug 06 '20 at 19:51

1 Answers1

2

Yes it is possible. You could save the current status of the system into a log file. Then a master script could read the last written status and run conditionally a certain script or function. Here is an example of such script:

$ cat ~/status-reboot.sh

#!/bin/bash


STATUS_LOG="$HOME/our.status.log"


Determinate whether the log file exists ? get the status : set status0


if [[ -f $STATUS_LOG ]]
then
CURRENT_STATUS="$(cat "$STATUS_LOG")"
else
CURRENT_STATUS="stage0"
echo "$CURRENT_STATUS : $(date)"
echo "$CURRENT_STATUS" > "$STATUS_LOG"
# You could reboot at this point,
# but probably you want to do action_1 first
fi


Define your actions as functions


action_1()
{
# do the 1st action


    CURRENT_STATUS="stage1"
    echo "$CURRENT_STATUS : $(date)"
    echo "$CURRENT_STATUS" > "$STATUS_LOG"
    exit # You could reboot at this point


}


action_2()
{
# do the 2nd action


    CURRENT_STATUS="stage2"
    echo "$CURRENT_STATUS : $(date)"
    echo "$CURRENT_STATUS" > "$STATUS_LOG"
    exit # You could reboot at this point


}


case "$CURRENT_STATUS" in
stage0)
action_1
;;
stage1)
action_2
;;
stage2)
echo "The script '$0' is finished."
;;
*)
echo "Something went wrong!"
;;
esac

Here is how it works within the command line:

$ ./status-reboot.sh
stage0 : Thu Aug  6 22:45:29 EEST 2020
stage1 : Thu Aug  6 22:45:29 EEST 2020


$ ./status-reboot.sh
stage2 : Thu Aug  6 22:45:33 EEST 2020


$ ./status-reboot.sh
The script './status-reboot.sh' is finished.


$ ./status-reboot.sh
The script './status-reboot.sh' is finished.

I think it should work without problem with crontab entry as this:

@reboot sleep 15 && "$HOME/status-reboot.sh" >> "$HOME/our.progress.log"
  • Please use full paths to the commands into your scripts used with crontab.

Reference: tldp.org - Using case statements

pa4080
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