在 CentOS 上使用 bash 脚本更改 SSH 端口

Posted 2023-03-10

【中文标题】在 CentOS 上使用 bash 脚本更改 SSH 端口

【英文标题】：Changing SSH port with a bash script on CentOS

【发布时间】：2013-08-08 14:26:15

【问题描述】：

所以我写了一个脚本，可以更改 CentOS 上的 SSH 端口，但由于某种原因，我遇到了这个错误：

sshchangecOS6.sh：第 36 行：语法错误：文件意外结束

这是脚本：

#! /bin/bash
# This script changes the ssh port for logins on CentOS 5 and 6
if [[ $EUID -ne 0 ]]; then
echo "This script must be run as root"
   exit 2
read -r -p "Would you like to change the ssh port? [Y/N] " response
if [[ $response =~ ^([yY][eE][sS]|[yY])$ ]]
then    
   read -p "What would you like to change the port to? (Chose between 1024-65535) " sshportconfig
   if (( ("$sshportconfig" > 1024) && ("$sshportconfig" < 65535) )); then
    echo "Port $sshportconfig" >> /etc/ssh/sshd_config
    echo "--------------------------------------------------------------------"
    echo ""
    echo ""
    echo "SSH port has been changed to: $sshportconfig. Written by Sincere the Minotaur."
    echo ""
    echo ""
    echo "--------------------------------------------------------------------"
   else
    echo "Port chosen is incorrect."
    exit 1
   fi
else 
   sshPort=$(grep "Port" /etc/ssh/sshd_config) | head -n 1
   echo "--------------------------------------------------------------------"
   echo ""
   echo ""
   echo "SSH is still: $sshPort"
   echo "Written by Sincere the Minotaur."
   echo ""
   echo "---------------------------------------------------------------------"
   exit 1
fi
exit 0

谁能解释错误在哪里？

【参考方案1】：

如果if [[ $EUID -ne 0 ]]; then，则第一个没有fi。您需要使用fi 关闭每个if。

【讨论】：

谢谢！我知道我错过了什么。