LychieFan 2020-04-14
1.netstat或ss命令
netstat -anlp | grep 80
2.lsof命令
这个命令是查看进程占用哪些文件的
lsof -i:80
3.fuser命令
fuser命令和lsof正好相反,是查看某个文件被哪个进程占用的。Linux中,万物皆文件,所以可以查看普通文件、套接字文件、文件系统。而套接字文件就包含了端口号。比如查看22端口。
fuser 22/tcp -v
USER PID ACCESS COMMAND
22/tcp: root 1329 F.... sshd
root 1606 f.... sshd
4.nmap工具
nmap默认总是会扫描端口,要扫描本机端口,很方便。
nmap localhost
Starting Nmap 5.51 ( http://nmap.org ) at 2018-03-03 18:00 CST
Nmap scan report for localhost (127.0.0.1)
Host is up (0.0000020s latency).
Other addresses for localhost (not scanned): 127.0.0.1
Not shown: 998 closed ports
PORT STATE SERVICE
22/tcp open ssh
25/tcp open smtp
Nmap done: 1 IP address (1 host up) scanned in 0.06 seconds