Sending email using telnet command

Open your command prompt. Now, connect with telnet using the following command: telnet 25 Type ehlo Some servers also accept helo in place of ehlo. ehlo Type mail from: mail from: Type rcpt to:, (replace with your actual recipient name): rcpt to:, To write the message – type data, followed…

How to set mtu size for a network interface in redhat linux ?

1. To dynamically change the MTU in real time while the server is in use, ip link set dev eth0 mtu 1350 2. To make the change permanent, edit the interface configuration file (for instance eth0) vi /etc/sysconfig/network-scripts/ifcfg-eth0 AND ADD THE FOLLOWING LINE MTU=1350 3. To restart the Network Interface service network restart eth0