检查两个进程是否未在shell脚本中运行

Question

如果两个进程未运行，如何检入“if”条件？

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议，我可以检查，如果只要求两个过程“而不是”运行

感谢

Answer 1

ps -aux |grep -v <process name> 

-v是“逆匹配'，IOW，当你正在寻找的物品不匹配时它会返回成功

Answer 2

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