input/output error from NFS client on CentOS

September 27, 2026 · by Zwiegnet Consulting · Linux

this error even good Linux Admins make from time to time, here’s the soltuion(s)

1) check that portmap start is running

service portmap start

chkconfig portmap on

once started try the mount again.

2) install nfs-utils

yum install nfs-utils

That’s it, you should be set, if one of those two does not work, then un-install and re-install nfs-utils.