如何在Ubuntu中釋放端口

Question

我想使用port no localhost：3000 for rails並且已經採用其他進程如何釋放此端口？

我已經運行此命令

ruby abc/script/server 

，並面臨着這樣的錯誤

/usr/lib/ruby/1.9.1/webrick/utils.rb:85:in `initialize': Address already in use - bind(2) (Errno::EADDRINUSE) 
from /usr/lib/ruby/1.9.1/webrick/utils.rb:85:in `new' 
from /usr/lib/ruby/1.9.1/webrick/utils.rb:85:in `block in create_listeners' 
from /usr/lib/ruby/1.9.1/webrick/utils.rb:82:in `each' 
from /usr/lib/ruby/1.9.1/webrick/utils.rb:82:in `create_listeners' 
from /usr/lib/ruby/1.9.1/webrick/server.rb:82:in `listen' 
from /usr/lib/ruby/1.9.1/webrick/server.rb:70:in `initialize' 
from /usr/lib/ruby/1.9.1/webrick/httpserver.rb:45:in `initialize' 
from /usr/lib/ruby/vendor_ruby/rack/handler/webrick.rb:10:in `new' 
from /usr/lib/ruby/vendor_ruby/rack/handler/webrick.rb:10:in `run' 
from /var/www/abc/vendor/rails/railties/lib/commands/server.rb:111:in `<top (required)>' 
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require' 
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require' 
from abc/script/server:3:in `<main>' 

Answer 1

請通過此鏈接，這將有助於...

http://geekbrigade.wordpress.com/2009/02/26/how-to-find-and-kill-a-process-that-is-using-a-particular-port-in-ubuntu/

Answer 2

netstat -tulpn | grep 3000 - 會給你進程的PID

e.g：

tcp 0 0 0.0.0.0:3000 0.0.0.0:* LISTEN  5726/ruby1.9.1 

這裏5726是PID，殺死它使用kill -9 5726

Answer 3

你也可以啓動軌服務器在不同的端口

rails server -p 4000 

Answer 4

嘗試類似這樣：

lsof -wni tcp:3000 

會顯示這樣的：

COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME 
ruby 3824 rony 9r IPv4 50665  0t0 TCP *:3001 (LISTEN) 

然後用這個PID殺死這個：

kill -9 3824 

謝謝！