Red Hat

[root@vm1 ~]# exit
logout
[vm1@vm1 ~]$ mkdir /home/vm1/Desktop/nfs
mkdir: cannot create directory `/home/vm1/Desktop/nfs': Permission denied
[vm1@vm1 ~]$ su mkdir /home/vm1/Desktop/nfs
su: user mkdir does not exist
[vm1@vm1 ~]$ sudo mkdir /home/vm1/Desktop/nfs

We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:

    #1) Respect the privacy of others.
    #2) Think before you type.
    #3) With great power comes great responsibility.

[sudo] password for vm1: 
vm1 is not in the sudoers file.  This incident will be reported.
[vm1@vm1 ~]$ visudo
visudo: /etc/sudoers: Permission denied
visudo: /etc/sudoers: Permission denied

[root@vm1 ~]# cat /etc/exports
/home/vm1/Desktop/nfs 192.168.1.34(rw,sync)
[root@vm1 ~]# exportfs
/home/vm1/Desktop/nfs
        192.168.1.34
[root@vm1 ~]# showmount -e 192.168.1.34
Export list for 192.168.1.34:
/home/vm1/Desktop/nfs 192.168.1.34

[root@vm1 ~]# visudo
[root@vm1 ~]# exit
logout
[vm1@vm1 ~]$ sudo mkdir /home/vm1/Desktop/nfs
[sudo] password for vm1: 
mkdir: cannot create directory `/home/vm1/Desktop/nfs': Permission denied