Introduction to Linux Rookie process detailed

Process

1. Process definition

process is the work that the CPU does not complete

2.ps command

PS A is also displayed for all processes in the current environment, not your own

x all processes unrelated to the current environment

F Show Process dependencies

e Displays all processes in the current user environment

L long list shows details of the process

U display user information for the process

PS Ax-o%cpu,%mem,user,group,comm,nice Specify some information for the display process

%CPU load

MEM Memory Load

User users

Group groups

Comm Name

Nice priority

PS ax-o%cpu,com--sort <+|-%cpu><+|-%mem> Sort by process information

+ Positive Sequence-flashback

3. Process priority

1 "Process priority range -20~19

2 "Priority View"

PS Ax-o Pid,nice,comm

3> specify a priority to open a process

Nice-n Priority Numeric Process name

Nice-n 5 Vim

4> Change Process Priority

Reince-n Priority Digital Process PID

Reince-n 5 18026 Change Process 18026 priority is 5

0 for recovery

Vim & Watch background, no use of terminal

4. Front and back calls to processes in the environment

Jobs view the process of being driven back into the environment

CTRL + Z takes the terminal process into the background

FG back the backstage process to the foreground

BG turns on the background pause process

Comm & let Commands run in the background

5. Signal process

1 "Common signal class

1 Process Reload configuration shell can not reload

2 and CTRL + C effect the same

3 Hidden processes

9 forcing the shutdown process

15 Normal shutdown process

18 Let the process run in the background

19 Let the process stop in the background

20 Push the process into the background and pause

Man 7 signal View signal details

Kill-Signal Process PID

Killall-Signal Process name

Pkill-u name (student)-Signal batch processing user's process

6. User Login Audit

1. W See what the current user of the system is using

W-f see where to use

2. Last View User Login success History

3. LASTB View User Login failure History

7.top command

? /h Help

1 CPU First Core load

Monitoring System Load Tool

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Introduction to Linux Rookie process detailed