Linux Rookie Learning Path >>7

Unit Seventh ***************
# # 1 # # Process definition
Process is the work that the CPU does not complete
# # 2 # # PS command
Ps
All processes running in a//shell
X//All processes not in Shell re-run
U//View process user Information
L//Show process details
F//Full information abbreviation
E//Show all processes in the current user shell
PS Ax-o%cpu,%mem,user,group,comm,nice,pid//Specify some information for the display process
%CPU//Show process CPU load
%men//Show process memory load
User//Process users
Group//Process groups
Comm//Process Name
Nice//Process priority
PID//Process ID

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PS ax-o%cpu,commm--sort <+|-%cpu> <+|-%men>//Sort by process information
+//Positive order
-//Reverse

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# # 3 # # Process Priority
1. Process Priority range: 20-19
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3, specify a priority to open the process nice-n priority number Process name
Example: Nice-n-5 VIM &//Turn on VIM and assign priority to-5

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4. Change process priority: RENICE-N Priority digital Process PID
Example: Renice-n-5 1806//change PID to 1806 process priority is-5

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# # 4 # # # # # front and back calls to processes in the environment
Jobs//View the process of being driven back into the environment
CTRL + Z//Take the terminal process into the background
FG//Back up the background process to the foreground
BG//Run the background paused process
Comm &//Let commands run directly in the background

# # 5 # # signal level
1. Common signal levels
1//Reload Configuration
2//delete process in-memory data
3//Remove data from mouse in memory
9//forcibly delete a single process
15//Normal shutdown process
18//Running a paused process
19//Pause a process
20//Get the process into the background
How to use: Kill-signal Process PID
Remove multiple processes with the same name: Killall-Signal Process name
Turn off all processes for student users: pkill-u student-Signal
# # 6 # # User Login Audit
1
w//See what current users currently use the system
W-f//See Where to use
2
Last//Production see User Login Success History
3
File:/run/media/kiosk/hello/linux Learning 7 Page 2 of 2
LASTB//View User login failure History
# # 7 # # Top command
Top//Monitoring System Load Tool

Linux Rookie Learning Path >>7