In this hands-on lab, we will practice finding and viewing processes running on a Linux system. Being able to locate a particular process and view its status is a fundamental component of systems administration.
Learning Objectives
Successfully complete this lab by achieving the following learning objectives:
- Determine How Many Processes Are Currently Running
- Run the following command:
ps aux | grep -v grep | wc -l
- Run the following command:
- Determine the Current System Load
- Run one of the following commands:
uptimecat /proc/loadavgtop
- Run one of the following commands:
- Determine How Many Processes Are Running as `cloud_user`
- Run one of the following commands:
ps -u cloud_user | wc -lps aux | grep -v grep | grep -E "^cloud" | wc -l
- Run one of the following commands:
- Determine the PID of the `xfce4-session` Process
- Run the following command:
ps aux | grep xfce4-session | grep -v grep
- Run the following command:
- Determine How Many Threads the `xfce4-session` Process Is Using
- Determine the PID:
ps aux | grep xfce4-session | grep -v grep - View the current threads reported in the PID’s status:
cat /proc/PROCESS_PID/status | grep Threads
- Determine the PID:
- Write a Small Shell Script that Returns the Number of Threads in a Process
Create a new file named
/home/cloud_user/bin/threads.sh, and add the following script:#!/bin/bash if [ -n $1 ] then _pid=$(ps aux | grep -E "$1$" | grep -v grep | grep -v threads.sh | awk '{print $2}') cat /proc/$_pid/status | grep Threads fi
