centos 6/RHEL7 源码安装openssh 8.3
环境:centos 7.1.1503 最小化安装
依赖包下载: yum -y install lrzsz zlib-devel perl gcc pam-devel
1、安装openssl ,选用最新发布的版本:openssl-1.1.1g.tar.gz
1)openssl下载地址:https://www.openssl.org/source/openssl-1.1.1g.tar.gz
2)卸载系统预装的openssl ,这一步可以不做
rpm -qa | grep openssl | grep -v lib
yum -y remove openssl-1.0.1e-42.el7.x86_64
3)安装步骤:
tar -zxvf openssl-1.1.1g.tar.gz
cd openssl-1.1.1g
./config --prefix=/usr/local/openssl --openssldir=/usr/local/openssl -Wl,-rpath,/usr/local/openssl/lib shared
make && make install
4)创建软链接
ln -s /usr/local/openssl/bin/openssl /usr/bin/openssl
ln -s /usr/local/openssl/include/openssl /usr/include/openssl
5)更新系统配置
echo "/usr/local/openssl/lib" >> /etc/ld.so.conf
/sbin/ldconfig
6)检查版本
openssl version
2、安装openssh,选用最新发布的版本:openssh-8.3p1.tar.gz
1)openssh下载地址:https://openbsd.hk/pub/OpenBSD/OpenSSH/portable/openssh-8.3p1.tar.gz
2)卸载系统预装的openssh
rpm -qa | grep openssh
yum -y remove openssh-server-6.6.1p1-11.el7.x86_64 openssh-clients-6.6.1p1-11.el7.x86_64 openssh-6.6.1p1-11.el7.x86_64
3)备份openssh配置文件,这一步可以不做
cp -r /etc/ssh /etc/ssh.bak
rm -rf /etc/ssh #这一步很重要,必须做
4)安装步骤
tar -zxvf openssh-8.3p1.tar.gz
cd openssh-8.3p1
./configure --prefix=/usr/local/openssh --sysconfdir=/etc/ssh --with-openssl-includes=/usr/local/openssl/include --with-ssl-dir=/usr/local/openssl --with-zlib --with-md5-passwords --with-pam --with-ssl-engine
make && make install
5)创建软链接
ln -s /usr/local/openssh/sbin/sshd /usr/sbin/sshd
ln -s /usr/local/openssh/bin/ssh /usr/bin/ssh
ln -s /usr/local/openssh/bin/ssh-add /usr/bin/ssh-add
ln -s /usr/local/openssh/bin/ssh-keygen /usr/bin/ssh-keygen
ln -s /usr/local/openssh/bin/ssh-keyscan /usr/bin/ssh-keyscan
6)将openssh的服务脚本复制到/etc/init.d目录下
cp /root/openssh-8.3p1/contrib/redhat/sshd.init /etc/init.d/sshd
chmod u+x /etc/init.d/sshd
备注:sshd.init 文件是存放在openssh的压缩包中,需要在解压的文件夹中查找
7)添加sshd服务
chkconfig --add sshd
8)检查openssh版本
ssh -V
9)修改openssh的配置文件,允许root登录
vi /etc/ssh/sshd_config
将 #PermitRootLogin prohibit-password 修改为 PermitRootLogin yes
10)将sshd服务设为开机启动
chkconfig sshd on
11)重启sshd服务
systemctl daemon-reexec
systemctl restart sshd
12)查看sshd服务状态
至此openssh服务安装完成,不放心的话可以reboot重启机器
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