openssh升级

ssh -V

cp -a /etc/ssh/sshd_config  /etc/ssh/sshd_config.bak

yum remove openssh-* -y

yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make -y    #安装依赖

tar xzf openssh-8.8p1.tar.gz

cd  openssh-8.8p1

./configure --prefix=/usr --sysconfdir=/etc/ssh --with-md5-passwords --with-privsep-path=/var/lib/sshd   #配置

make & make install   #编译安装

ssh -V

cp -p contrib/redhat/sshd.init /etc/init.d/sshd   #拷贝启动文件

chkconfig --add sshd    #添加自启动
 
chkconfig sshd on       #开机自启动

chkconfig --list sshd   #查看自启动

#官网介绍需要新版本算法更新，需要新增两个配置项，之前配置的密钥才能正常登录
vim /etc/ssh/sshd_config
HostkeyAlgorithms +ssh-rsa
PubkeyAcceptedAlgorithms +ssh-rsa

systemctl restart sshd   #重启