View the Most Wanted LQ Wiki articles.
Go Back > Forums > Linux Forums > Linux - Newbie
User Name
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!


  Search this Thread
Old 08-23-2004, 06:44 AM   #1
Registered: Aug 2004
Location: India
Posts: 54

Rep: Reputation: 15
loopback device

Friends !

What is loopback device. When I "ifconfig" it is also displaying lo:

what it is exactly
Old 08-23-2004, 07:04 AM   #2
Registered: Aug 2002
Posts: 13,322

Rep: Reputation: 1093Reputation: 1093Reputation: 1093Reputation: 1093Reputation: 1093Reputation: 1093Reputation: 1093Reputation: 1093
A network loopback device i.e. lo is assigned the IP address, its is also known as localhost. It allows one to run network applications on the computer without need for a network card.

There are several webserver applications that are usefull in configuring the OS like webmin, swat and cups.

There are filesystem loop devices too. This allows one to mount a file as a block device. An example would be to mount an ISO file to examine its contents.

Last edited by michaelk; 08-23-2004 at 07:06 AM.
Old 08-23-2004, 07:27 AM   #3
Registered: Aug 2004
Location: Cairo, Egypt
Distribution: Slackware
Posts: 101

Rep: Reputation: 15
simply, a virtual ethernet device. in addition, u can use it to "test" the network services installed on your machine without the need to a real network connection.

also, loopback filesystem are mcuh like virtual CD file in windo$ (spell!)



Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
PCAP on LOOPBACK Device johnnyde Programming 4 03-05-2009 04:05 AM
no loopback device in routing table KingNothing Linux - Networking 3 05-02-2004 02:08 AM
writing a loopback device ebh1 Linux - Newbie 2 03-12-2004 05:12 PM
loopback device in 2.5.47 broken markus1982 Linux - General 3 11-13-2002 11:52 AM
loopback adapter --> unamanaged device sc300t Linux - General 0 01-17-2002 10:10 PM

All times are GMT -5. The time now is 07:25 AM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration