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What will happen if I remove this line from /etc/hosts

rated 0 times [ 3] [ 0] / answers: 1 / hits: 1688 / 2 Years ago, mon, september 19, 2022, 2:01:45

I am trying to configure Hadoop and have problems configuring it. One doubt I have about network config and it's related to host info.

In /etc/hosts second line is like 127.0.1.1 slave1-machine and I know it is related to machine name. But the thing I do not know, is that what is the purpose for this line and if I remove it from the file, what will happen?

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leadprogres

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3 Years ago

answered 2 Years ago afisird · Accepted Answer

When you remove the line you can't resolve the Hostname slave1-machine to a IP Address anymore.
Linux looks into the /etc/hosts before triyng to resolve a hostname via a DNS Query.
So if you remove the Line. Linux try to resolve the Hostname slave1-machine via DNS and get a negative response.