Linux view the port occupancy can use lsof and netsta t command or use iis7 server monitoring tool .
lsof
lsof (list open files) list the current system is a tool to open the file.
lsof view the port occupied syntax:
lsof -i: port number
Examples
View occupancy server port 8000:
lsof -i:8000
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
nodejs 26993 root 10u IPv4 37999514 0t0 TCP *:8000 (LISTEN)
You can see port 8000 is already in use light nodejs service.
lsof -i root privileges required to execute the user, as shown below:
More lsof command as follows:
lsof -i: 8080: 8080 View port occupied
lsof abc.txt: displays the process open files abc.txt of
lsof -c abc: abc display process is now open files
lsof -c -p 1234: 1234 lists the process ID for the process of the open files
lsof -g gid: gid ownership of the process display case
lsof + d / usr / local / : the process open files in the directory is displayed
above, but will search the directory under the directory: lsof + d / usr / local / , longer
lsof -d 4: 4 is displayed using fd for the process of
lsof -i -U: displays all open ports and UNIX domain files
netstat
netstat -tunlp used to display the relevant circumstances tcp, udp port, and processes.
netstat view the port occupied syntax:
netstat -tunlp | grep port number
-t (tcp) 仅显示tcp相关选项
-u (udp)仅显示udp相关选项
-n 拒绝显示别名，能显示数字的全部转化为数字
-l 仅列出在Listen(监听)的服务状态
-p 显示建立相关链接的程序名Such as viewing port 8000 case, use the following command:
netstat -tunlp | grep 8000
tcp 0 0 0.0.0.0:8000 0.0.0.0:* LISTEN 26993/nodejs
More command:
netstat -ntlp // View all current tcp port
netstat -ntulp | grep 80 // View all 80 ports use
netstat -ntulp | grep 3306 // View all 3306 port usage
kill
After the occupation of the port process found, if you want to kill the corresponding process can use the kill command:
kill -9 PID
As an example, we see that port 8000 corresponding PID is 26993, use the following command to kill the process:
kill -9 26993