centOS自动升级openssh脚本（需联网，已测试可用）
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2023-10-30
09:14:20
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#!/bin/bash
clear
echo ------------------------------------------
echo CentOS7.6 openssh 升级到 8.8p1
echo $(date +%F-%T)
echo 注意环境，使用前请做好测试！！！
echo ------------------------------------------
sleep 3s
clear
echo 安装进程开始 3
sleep 1s
clear
echo 安装进程开始 3 2
sleep 1s
clear
echo 安装进程开始 3 2 1
sleep 1s
clear
echo 刷新 yum 元数据缓存
sleep 2s
yum makecache
sleep 3s
clear
echo 检测安装 telnet 服务
sleep 1s
echo 尝试启动 telnet 服务
sleep 1s
cp /etc/securetty /etc/securetty.bak
grep "pts/0" /etc/securetty || echo 'pts/0' >> /etc/securetty
grep "pts/1" /etc/securetty || echo 'pts/1' >> /etc/securetty
systemctl restart telnet.socket && systemctl restart xinetd
ps -ef |grep xinetd | egrep -v grep > /dev/null
if [ $? -eq 0 ]
then
echo 检测到 telnet 服务已启动……
systemctl enable telnet.socket
systemctl enable xinetd
sleep 2s
else
echo 未检测到 telnet 服务，开始安装服务……
sleep 2s
yum -y install xinetd telnet-server
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