top: /proc is not mounted, required for output data 的解解决方法

先查看 fstab 正常
[root@www ~]# grep proc /etc/fstab
proc                    /proc                   proc    defaults        0 0

查看mount |grep proc

[root@www~]# mount | grep proc
/proc on /proc type proc (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)

解决

mount -o,remount proc /proc -t proc