Allow X11-Forwarding to work in Linux

In RHEL / CentOS

- Install package xorg-x11-xauth

- Have below options set in /etc/ssh/sshd_config and followed by sshd restart

[root@dumphost ~]# grep X11Forwarding /etc/ssh/sshd_config
X11Forwarding yes

[root@dumphost ~]# grep AllowTcpForwarding /etc/ssh/sshd_config
AllowTcpForwarding yes