How to check whether a script process exists in Linux

Linux methods to check whether a script process exists: 1. Use the ps command to list the currently running processes, use the grep command to filter out the processes related to the script, and check whether they exist; 2. Use the pgrep command , find the process ID through the name of the process; 3. Use the pidof command to directly find the process ID through the name of the process.

The operating system of this tutorial: Linux5.18.14 system, Dell G3 computer.

In Linux, you can use a variety of methods to see if a script process exists. The following are several common methods:

1, Use the ps command: The ps command can list the currently running processes. You can use the grep command to filter out script-related processes and check whether they exist. For example, assuming the script is named script.sh, you can use the following command to check whether the process exists:

  ps aux | grep script.sh

If the output includes processes related to the script, it means that the process exists.

2, Use the pgrep command: The pgrep command can find the process ID through the name of the process. You can check if the script process exists using the following command:

 pgrep -f script.sh

If the command returns a process ID, it means the process exists.

3, Use the pidof command: The pidof command can directly find the process ID through the name of the process. You can check if the script process exists using the following command:

  pidof script.sh

If the command returns a process ID, it means the process exists.

Depending on the specific situation, choose the appropriate method to check whether the script process exists. These methods can also be implemented through system calls or library functions in programming languages ​​(such as C, Python).

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