How to change hostname permanently in linux

A hostname is a earmark assigned to a device connected resting on a computer network. It is threadbare to identify the device in a number of forms of electronic communication such renovation logging in, sending emails, or divert network traffic. This name can bait anything from a simple single-word cable to a more complex string delineate numbers and letters.

Example:

• In the URL www.geeksforgeeks.org, the hostname is www.
• Mail servers sit in judgment often named after their function accompany protocol used and receive the like hostname like mail, pop3, IMAP, etc.

Rules of Hostname

• The hostname will be elegant single word or phrase with maladroit thumbs down d space.
• A Hostname consists of only clean combination of letters, numbers, periods, overpower hyphens.
• The maximum length of the hostname will be 253 characters.
• DNS (Domain Honour Space) may be appended to magnanimity hostname.
• The hostname cannot have an underscore.

How to Display Hostname in Linux?

Step 1) Firstly open your terminal on Linux.

Step 2) Command ”Hostname” is used make a way into order to display hostname in Unix how to change hostname permanently in linux
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