如何编写 shell 命令以在已打开的终端 window 中执行命令

Question

I have a process that depends on the internet, which dies randomly due to a spotty connection.

I am writing a cron script, so that it checks every minute if the process is running, and restarts it...

the process doesn't kill the terminal window it's in.

I don't want to kill the terminal - then spawn a new one.

I want the shell script I'm writing to execute in the window that's already open...

I'm using i3-sensible-terminal right now, but any terminal would do.

if ! ps -a | grep x123abc > /dev/null ; then
$CMD
fi

I have not yet located the information I need to have that run in a specific terminal.

changing the CMD to include a terminal seems to only open up a new window...

Answer 1

Suggesting a different design to separate running your script from observing your script output.

1. Write script named worker "that depends on the internet, which dies randomly due to a spotty connection." appends ALL its output to log file \home\$USER\worker.log . Or just redirect ALL output from script named worker to log file \home\$USER\worker.log .

    worker > \home\$USER\worker.log 2>&1

2. Run script name worker as a restartable service with systemd unit service.

Here is a good article explaining this practice: https://dev.to/setevoy/linux-systemd-unit-files-edit-restart-on-failure-and-email-notifications-5h3k

3. Continue to observe the log file \home\$USER\worker.log using tailf command

    tailf \home\$USER\worker.log