ps Command Examples in Linux¶
Introduction¶
These examples show practical ways to use ps on a Linux terminal. Each example is written so you can adapt it for administration or troubleshooting.
Example 1: Basic Usage¶
ps
This is the simplest form of the command and is a good starting point before adding options.
Example 2: Common Admin Task¶
ps aux
This example reflects a common task on RHEL, Rocky Linux, AlmaLinux, or similar systems.
Example 3: Useful Option¶
ps -ef
This option helps narrow the result, change behavior, or handle a more realistic target.
Example 4: Real-World Scenario¶
ps aux | grep httpd
Use this pattern when the task moves beyond a single basic command.
Example 5: Verification¶
ps -p 1 -o pid,comm,args
Example output:
PID COMMAND COMMAND
1 systemd /usr/lib/systemd/systemd --switched-root --system --deserialize=31
Common Mistakes¶
- Expecting ps to update live like top.
- Matching the grep command itself when searching process output.
- Using different ps option styles without understanding the output columns.
Quick Reference¶
ps
ps aux
ps -ef
ps aux | grep httpd
ps -p 1 -o pid,comm,args
Related Guides¶
Summary¶
Good ps usage means choosing the right option, keeping the target clear, and verifying the result with output you can explain.