Combine pgrep with Other Commands for Advanced Process Monitoring
In this final step, you will learn how to combine the pgrep
command with other Linux commands to perform more advanced process monitoring tasks.
One common use case is to combine pgrep
with the ps
command to get more detailed information about the running processes:
ps -f -p $(pgrep <process_name>)
This will display the full process information, including the user, PID, parent PID, start time, and command for the processes that match the specified <process_name>
.
Example output:
UID PID PPID C STIME TTY TIME CMD
labex 1234 5678 0 10:30 pts/0 00:00:01 /usr/bin/python3 /app/webserver.py
labex 5678 9012 0 10:29 pts/0 00:00:00 nginx: master process nginx -g daemon off;
labex 9012 1234 0 10:29 pts/0 00:00:00 nginx: worker process
You can also use pgrep
with other commands, such as kill
or top
, to manage or monitor processes more effectively:
## Kill all processes with a name that starts with "web"
sudo kill -9 $(pgrep -f ^web)
## Monitor the top CPU-consuming processes
top -p $(pgrep -d, <process_name>)
The first example uses pgrep
to find the PIDs of all processes with a name starting with "web", and then uses the kill
command to terminate them. The second example uses pgrep
to get the PIDs of the processes matching the specified <process_name>
, and then passes them to the top
command to monitor their resource usage.