webpack-dev-server can't find localhost

[em-cd]

I'm running Yosemite on a mac. I installed the webpack server ok but when I run the command webpack-dev-server I get the error:

events.js:154
throw er; // Unhandled 'error' event
^

Error: getaddrinfo ENOTFOUND localhost
at errnoException (dns.js:26:10)
at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:77:26)

I've checked the hosts file and localhost is correctly listed there. I am also using MAMP for another project on port 80, so I tried running the server on a different port with the command webpack-dev-server --port 3001 but got the exact same error. Any ideas why this is happening?

[em-cd]

nvm, /etc/hosts was messed up after all. my bad!

[nebiljabari]

If it can help someone with the same annoying error : angular/angular-cli#2227 (comment)

[Chewiwehavecompany]

I tried to run the command ng serve in terminal and I get this error

getaddrinfo ENOTFOUND localhost
Error: getaddrinfo ENOTFOUND localhost
at errnoException (dns.js:50:10)
at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:92:26)

Help please