cannot change directory to /home/user1. Permission denied on NFS mount

If you encountered the "cannot change directory to /home/user1. Permission denied on NFS mount" when you do a su --login user1. Do check the base directory permission. If the owner and group /home is root.root, do remember to chmod 755

# ls -ld /home
drwx------ 7 root root 8192 Dec 22 15:13 home

Change the permission to

# chmod 755 /home
drwxr-xr-x 7 root root 8192 Dec 22 15:13 home