A detailed description of Linux process management tools

Process management Tools

View process

Pstree Show Process Tree

-P: Display PID

Ps

Search process

PS | Grep

Pgrep

Pidof

• System Monitoring Tools

Uptime

Free

Top

The first line: The current system time system boot up to now the time elapsed the current number of users system in 1, 5, 15 minutes of the average load

equivalent to uptime command; Interactive button: l

Note: The smaller the average load value, the more idle the system is, and if it is above 1, the current system load is too high

second line: Shows the current total process volume with the individual program in what state (Running,sleeping,stopped,zombie)

Note: The last zombie value, if not 0, requires a look at which process is in a zombie state.

The third line: The overall CPU load is displayed, if it is multi-core, you can use the number 1 key to toggle the display mode

Us:user Space user Run program consumes CPU percentage

Sy:system percentage of CPU used to run the kernel

Ni:nice the percentage of CPU that processes that have changed the priority of the user process space

Id:idle Idle CPU Percentage

Wa:wait to wait I/O takes time

Hi:hardware Interrupt hard key interrupt consumes CPU percentage

Si:software Interrupt Soft Key interrupt consumes CPU percentage

St:stolen, percentage of "stolen" by virtual machine

Line four: Physical memory usage line fifth: Swap partition condition press M to toggle display mode

Htop

Iotop

glances       

Vmstat

Iostat

Dstat

Management process

Signal Man 7 SIGNAL

Show All Signals Kill-l | Drop-l

1) SIGHUP do not restart the process and let it reread the configuration file

2) SIGINT equivalent to CTRL + C

3) Sigquit equivalent to Ctrl+\

9) SIGKILL Force abort the process of running

SIGTERM process of normal abort operation

) Sigcont Continue

() SIGSTOP Sleep

Kill

Killall

Pkill

A detailed description of Linux process management tools