To Send Message & Mail

# ssh host_name@IP address [for remote access]

Ex: ssh linux @192.168.1.100

# write host_name [to write message to another user in the network]

# masg n [to disable message service]

# masg y [to enable message service]

# wall [to send message to all user]

[ctrl+d-> to save msg, ctrl+c-> to exit msg]

# mail hostname [to send mail]

# mail [to show the mail]