If you hit F5 in htop, you can see the process hierarchy. These relationships form a tree structure. The new process is now a child process for the parent process. When you launch a new process, the process that launches the new process is called the parent process. If you run a program in the background ( &) from bash, you will see the job number in square brackets and the PID. PID (Process ID)Įvery time a new process is started, it is assigned an identification number (ID) called process ID or PID for short. If you take another look at the strace output, you'll see that this file was also opened. They are taken from the /proc/loadavg file. In addition to uptime, three numbers represent the load average. It reads the information from the /proc/uptime file. The same information can be seen by running the uptime command. This parameter indicates how long the system has been running. Now, let’s see what each field means, starting at the top: Uptime Here’s what the htop interface looks like: First and foremost, you need to install htop on your system.
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