How to fix df –h command hangs on RHEL7/Centos7

The most common cause of df -h command hanging while reading related files to return output and fails without output.

Faced the same issue on RHEL 7.5 Linux box and I have reinstalled the systemd package and the issue is resolved without rebooting the server.

Option 1: Reinstall systemd package:

[root@linuxcnf ~]# yum reinstall systemd Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile ……… Installed:   systemd.x86_64 0:219-57.el7 Complete! [root@linuxcnf ~]#

 Option 2: Check the file /etc/mtab

Check the file /etc/mtab, by default in RHEL 7 /etc/mtab is symbolic link to /proc/self/mounts and check the permissions as well.

[root@linuxcnf ~]# ls -ld /etc/mtab lrwxrwxrwx. 1 root root 17 Jan 12 05:46 /etc/mtab -> /proc/self/mounts [root@linuxcnf ~]#

Now the df -h command hanging has been resolved!!!