[root@localhost html]# pstree | grep httpd
-bash: pstree: command not found
解决办法：
# yum install psmisc -y
Centos8-pstree: command not found
docker镜像网站 https://docker.xuanyuan.me/#google_vignette
计算机网络/计算机科学与应用/系统/运维/开发
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
docker镜像网站 https://docker.xuanyuan.me/#google_vignette