What's the best way to confirm that your /etc/hosts file is mapping a hostname to the correct IP address?

Using a tool like dig queries an external DNS directly, bypassing the hosts file.

  • hosts files do not map domains....them map specific hostnames to IP addresses. – mdpc Jun 2 '14 at 18:10
  • @mdpc I edited it to reflect that. Basically the same question though, I was just looking for a way to verify the hosts file entry is working. – Jay Jun 2 '14 at 18:17

I tried this out and it seems to work as expected:

echo " facebook.com" >> /etc/hosts

Then I ran:

$ getent ahosts facebook.com         STREAM facebook.com         DGRAM         RA
  • 1
    looks good, thanks! I also found that ping works: ping facebook.com outputs: PING facebook.com ( 56(84) bytes of data. – Jay Jun 2 '14 at 20:19

I found gethostip which accepts either hostname or IP and also has options suitable to print out exactly what you need.

$ gethostip -d facebook

You can use the 'ping' command to check the values added in /etc/hosts are working fine or not.

echo "   abc.com" >> /etc/hosts
ping abc.com

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.