# ps ##### 以 PID 查詢 ```shell ps -fp ps -fp ,, ``` ##### 分析 CPU/Memory 使用 CPU 使用率最高前10排名 ```shell # for CentOS ps -eo pid,ppid,cmd,%mem,%cpu --sort=-%cpu | head -11 ps aux | head -1; ps aux | sort -rn +2 | head -10 ps -auxf | sort -nr -k 3 | head -10 # for AIX 7.2 ps aux | head -1; ps aux | sort -rn -k 3 | head -10 ``` Memory 使用率最高前10排名 ```shell # for CentOS ps -eo pid,ppid,cmd,%mem,%cpu --sort=-%mem | head -11 ps aux | head -1; ps aux | sort -rn +3 | head ps aux | head -1; ps aux | sort -rn -k 4 | head ps -auxf | sort -nr -k 4 | head -10 ps -eo cmd,pid,ppid,%mem,%cpu --sort=-%mem | head -n 6 ps aux | awk '{print $6/1024 " MB\t\t" $11}' | sort -rn | head -25 ``` ##### 優先權最高的程序 ```shell ps -eakl | sort -n +6 | head # or ps -eal | sort -n -k 7 | head ``` ##### 程序以 nice 值排序 ```shell ps -eakl | sort -n +7 ps -eal | sort -n -k 8 ``` ##### 程序以執行時間排序 ```shell ps vx | head -1;ps vx | grep -v PID | sort -rn +3 | head -10 ps vx | head -1;ps vx | grep -v PID | sort -rn -k 4 | head -10 ``` ##### 程序以 I/O 排序 ```shell ps vx | head -1; ps vx | grep -v PID | sort -rn +4 | head -10 ps vx | head -1; ps vx | grep -v PID | sort -rn -k 5 | head -10 ``` ##### 等待中的程序 ```shell ps vg | head -1; ps vg | grep -w wait ``` ##### 指定 PID 的啟動時間與總執行時間 ```shell ps -p -o etime,start ps -p -o etimes ``` ##### 每個用戶的程序數量 ```shell ps -ef | awk '{print$1}' | sort | uniq -c | sort -nr ``` ##### 顯示用戶 vivek 的所有程序 ```shell ps -U vivek -u vivek u ``` ##### 指定要顯示的欄位 ```shell ps -eo pid,tid,class,rtprio,ni,pri,psr,pcpu,stat,wchan:14,comm ps axo stat,euid,ruid,tty,tpgid,sess,pgrp,ppid,pid,pcpu,comm ps -eopid,tt,user,fname,tmout,f,wchan ``` ##### 顯示程序 lighttpd 的 pid ```shell ps -C lighttpd -o pid= ``` ##### 顯示 pid XXX 的程序名稱 ```shell ps -p 55977 -o comm= ```