Linux top

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top command: used to check the cpu, memory usage
 
Z: zombie
S: sleep
D: deep sleep
R: running
T: stopped
K: used to kill process
M: default the process is order by CPU usage. Use "M" to change to order by Memory usage
R: change privilege -20 ~ 19
 
Zombie process operation:
1. Kill the parent process, check the PPID;
2. Kill the terminal;
3. Restart server

 

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