檢查兩個進程是否未在shell腳本中運行

Question

如果兩個進程未運行，如何檢入「if」條件？

我用

if [ `pgrep <process name>`] does not work with ot without square brackets 
using ps -aux |grep <process name> in if condition does not work, since every time 
grep <process name> 
is up and it will always pass 

任何人有任何好的建議，我可以檢查，如果只要求兩個過程「而不是」運行

感謝

Answer 1

ps -aux |grep -v <process name> 

-v是「逆匹配'，IOW，當你正在尋找的物品不匹配時它會返回成功

Answer 2

if [ $(ps aux | grep -E "(processName1|processName2)" | grep -v grep | wc -l) -eq 0 ] 
then 
    echo "not running" 
fi