14.1: Basic introduction
14.2: Display the processes executed by the system
14.3: Terminating processes kill and killall
14.4: View process tree pstree
Basic syntax: pstree [option] , you can view process information more intuitively
Common options:
-p: Display the PID of the process
-u: Display the user who owns the process
14.5: Service management
View service name:
Method 1: Use setup -> system services to see all
Method 2: /etc/init.d See the services managed by the service command ls -l /etc/init.d
Runlevel:
14.6: Dynamic monitoring of processes
Introduction: top is very similar to ps command. They are both used to display the executing process. The biggest difference between them is that top can update the running process after executing for a period of time.
Basic syntax: top [options]
Option description:
| Options | |
|---|---|
| -d seconds | Specify the top command to update every few seconds, the default is 3 seconds |
| -i | Make top not display any idle or zombie processes |
| -p | Only monitor the status of a process by specifying the monitoring process ID. |
zombie : zombie process
Interactive operations:
| operate | Function |
|---|---|
| P | Sort by CPU usage, the default is this item |
| M | Sort by memory usage |
| N | Sort by PID |
| q | Exit top |
14.7: Monitor network status
