[root@localhost html]# pstree | grep httpd
-bash: pstree: command not found
解决办法:
# yum install psmisc -y

计算机网络/计算机科学与应用/系统/运维/开发
[root@localhost html]# pstree | grep httpd
-bash: pstree: command not found
解决办法:
# yum install psmisc -y

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