Linux command explanation-process view

1. View of the process:

Ps–el

--E: Show all processes, including those without control terminal

--l: Display in long format

The results show:

PID: Process Number

PPID: Parent Process

TTY: Control terminal

Stat: The current state of the process where S: Indicates sleep state, D: Non-interruptible sleep Z: Zombie status R: Running

NI: View Process priority

Time: The total duration of the launch

Ps–aux

--A: Show All Processes

--u: Show Users

--x: Show non-terminal processes

Ps–aux–sort PID

Sort by Process number

2. Kill the process:

Xclock Open Time Process

Ps–aux | grep xclock Find to process number

Kill Process Number

Kill–s Signal Process Number

Kill–l List all signals

For example: Kill–s 19 2051//19: Indicates a stop signal, can be viewed by Kill–l, 2051 represents the time process number

Killall process name kills all processes

For example:

Service httpd start//Turn on HTTP service

Ps–aux | grep httpd

Killall httpd

Xkill Graphical interface can use this command to kill graphical interface Ctrl+alt+tab exit

3. Change the priority of the process

Nice-n level Process number//Specify process

Renice n PID//running process, changing the priority of the process

4. Real-time Process view

Top: Real-time viewing process, automatically refreshed every five seconds

-D: Show the first few Eg:top–d 3//Show only the first three

-C: Displays the entire command line and not just the command name

-Q: Update the displayed information immediately

U: View Users

H? : Help

K: Kill Process

NQ: Exit

5. Process hangs

Xclock &//Indicates that the Xclock process is being run in the background

CTRL +Z//Background run hangs

Ctr +c

Jobs: View all the processes in the background

FG N: Get the background process to the foreground n indicates the job number

BG N: Put in the background

Linux command explanation-process view