如何在Ubuntu中释放端口

Question

我想使用port no localhost：3000 for rails并且已经采用其他进程如何释放此端口？

我已经运行此命令

ruby abc/script/server 

，并面临着这样的错误

/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

请通过此链接，这将有助于...

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 - 会给你进程的PID

e.g：

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

这里5726是PID，杀死它使用kill -9 5726

Answer 3

你也可以启动轨服务器在不同的端口

rails server -p 4000 

Answer 4

尝试类似这样：

lsof -wni tcp:3000 

会显示这样的：

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

然后用这个PID杀死这个：

kill -9 3824 

谢谢！