How to List all ip addresses on ip block or subnet !?

Hello ,

i need to write small bash script to list in loop all possible ip addresses in specific subnet or ip block.

example 1 :
ip block will list : -

will list the following ip addresses : -

exmple 3: / 20
will list the following ip addresses : -

thank you !
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Following script lists all possible ip address in range:


  ping -c 1 $1 > /dev/null
  [ $? -eq 0 ] && echo Node with IP: $i is up.

for i in 192.168.1.{1..255} 
is_alive_ping $i & disown

Open in new window

Then save the scipt as a named

Execute the script file

Open in new window

Sample output like this:

Node with IP: is up.
Node with IP: is up.
Node with IP: is up.

Open in new window

hintco are you there?
hintcoAuthor Commented:
right but i need something general for any type of subnet and networks not just class C network with subnet /24

thank you !
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Linux Networking

From novice to tech pro — start learning today.