Linux: Find Out Which Process Is Listening Upon a Port 查看是那个进程在占用哪个端口

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查看是那个进程在占用哪个端口，可以考虑使用：

1. netstat – a command-line tool that displays network connections, routing tables, and a number of network interface statistics.
2. fuser – a command line tool to identify processes using files or sockets.
3. lsof – a command line tool to list open files under Linux / UNIX to report a list of all open files and the processes that opened them.
4. /proc/$pid/ file system – Under Linux /proc includes a directory for each running process (including kernel processes) at /proc/PID, containing information about that process, notably including the processes name that opened port.

步骤1：

# netstat -tulpn

Sample outputs:

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN      1138/mysqld     
tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN      850/portmap     
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      1607/apache2    
tcp        0      0 0.0.0.0:55091           0.0.0.0:*

TCP port 3306 was opened by mysqld process having PID # 1138. You can verify this using /proc, enter:
# ls -l /proc/1138/exe

https://www.cyberciti.biz/faq/what-process-has-open-linux-port/

另外可以参考

http://unix.stackexchange.com/questions/106561/finding-the-pid-of-the-process-using-a-specific-port

On Linux, you must be root or the other user to get process information for processes running as other users, so prepending sudo is most of what you need. In addition to that, on modern Linux systems, ss is tool to use to do this:

$ sudo ss -lptn 'sport = :80'
State   Local Address:Port  Peer Address:Port              
LISTEN  127.0.0.1:80        *:*                users:(("nginx",pid=125004,fd=12))
LISTEN  ::1:80              :::*               users:(("nginx",pid=125004,fd=11))

转载于:https://my.oschina.net/u/2308739/blog/835494