To run a script after a PPP interface comes up under Linux, you can use the ppp-watch command. The ppp-watch command allows you to specify a script that will be executed when the PPP interface comes up or goes down.
To use the ppp-watch command, you will need to create a script that will be executed when the PPP interface comes up. The script should contain the commands that you want to run after the PPP interface comes up.
Once you have created the script, you can use the ppp-watch command to specify the script and start monitoring the PPP interface. For example:
ppp-watch -u /path/to/script
This will start monitoring the PPP interface and run the script specified in the -u option when the PPP interface comes up.
You can also use the ppp-watch command to specify a script that will be executed when the PPP interface goes down. For example:
ppp-watch -d /path/to/script
This will start monitoring the PPP interface and run the script specified in the -d option when the PPP interface goes down.
By using the ppp-watch command, you can run a script after a PPP interface comes up under Linux. It's always a good idea to carefully review the documentation and use the appropriate options when working with the ppp-watch command. This will help ensure that your script is executed correctly and that any problems are detected and addressed.