$ hexo server FATAL Port 4000 has been used. Try other port instead. FATAL Something's wrong. Maybe you can find the solution here: http://hexo.io/do Error: listen EADDRINUSE 0.0.0.0:4000 at Object.exports._errnoException (util.js:1026:11) at exports._exceptionWithHostPort (util.js:1049:20) at Server._listen2 (net.js:1257:14) at listen (net.js:1293:10) at net.js:1403:9 at _combinedTickCallback (internal/process/next_tick.js:77:11) at process._tickCallback (internal/process/next_tick.js:98:9) FATAL listen EADDRINUSE 0.0.0.0:4000 Error: listen EADDRINUSE 0.0.0.0:4000 at Object.exports._errnoException (util.js:1026:11) at exports._exceptionWithHostPort (util.js:1049:20) at Server._listen2 (net.js:1257:14) at listen (net.js:1293:10) at net.js:1403:9 at _combinedTickCallback (internal/process/next_tick.js:77:11) at process._tickCallback (internal/process/next_tick.js:98:9)