如何看OS的端口是否是打开的。

abcdex

如何判断端口449和312是否打开，OS是REDHAT

zhleiling

netstat -an|grep -P '449|312)'

AirManSix

1. [root@xxxxxx termios]# telnet 127.0.0.1 449
   
2. Trying 127.0.0.1...
   
3. telnet: connect to address 127.0.0.1: Connection refused
   
4. telnet: Unable to connect to remote host: Connection refused
   
5. [root@xxxxxx termios]# telnet 127.0.0.1 312
   
6. Trying 127.0.0.1...
   
7. telnet: connect to address 127.0.0.1: Connection refused
   
8. telnet: Unable to connect to remote host: Connection refused
   
9. [root@xxxxxx termios]# telnet 127.0.0.1 5432
   
10. Trying 127.0.0.1...
    
11. Connected to xxxxxx.com (127.0.0.1).
    
12. Escape character is '^]'.
    
13. 
    
14. 
    
15. Connection closed by foreign host.
    
16. [root@xxxxxx termios]#

复制代码

试试看

zhleiling

出现了表情。。。

1. netstat -an|grep -P ':(419|312)'

复制代码

回复 2# zhleiling


   

shmtu2005

netstat -an如果现实Listening，代表端口打开了

yestreenstars

可以直接在服务器上用netstat查看，也可以在服务器或者其他电脑上用telnet测试~

Shell_HAT

1. lsof -i :449

复制代码

expert1

好吧，我来个冷门的
nc 还是比较好用的，不是脑残啊

o枫叶o飘零

回复 8# expert1


    nc  你想搞死搞残麽