Linux下修改端口号只需要更改相应服务的配置文件即可，下面以修改linux 的SSH服务的默认端口号22为例（把22修改我2501）：1、修改/etc/ssh/sshd_config配置文件
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[root@localhost ssh]# more sshd_config
# $OpenBSD: sshd_config,v 1.69 2004/05/23 23:59:53 dtucker Exp $
# This is the sshd server system-wide configuration file. See
# sshd_config(5) for more information.
# This sshd was compiled with PATH=/usr/local/bin:/bin:/usr/bin
# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented. Uncommented options change a
# default value.
#Port 22 //先把22注释掉
port 2501 //添加一个新的端口
#Protocol 2,1
2、重启ssh服务让修改的端口号生效
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[root@localhost ~]# service sshd restart
Stopping sshd:[ OK ]
Starting sshd:[ OK ]
