1、准备工作:
查看下当前SSH版本: [[email protected] ~]# ssh -V
OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013 或者
[[email protected] ~]# rpm -qa | grep openssh
openssh-server-5.3p1-122.el6.x86_64
openssh-clients-5.3p1-122.el6.x86_64
openssh-5.3p1-122.el6.x86_64
openssh-askpass-5.3p1-122.el6.x86_64
2、确认、安装依赖包: 确认三个依赖包是否安装
[[email protected] ~]# rpm -qa |grep zlib-devel zlib-devel-1.2.3-29.el6.x86_64
[[email protected] ~]# rpm -qa |grep openssl-devel
openssl-devel-1.0.1e-48.el6_8.1.x86_64
[[email protected] ~]# rpm -qa |grep gcc
libgcc-4.4.7-17.el6.x86_64 gcc-c++-4.4.7-17.el6.x86_64
gcc-4.4.7-17.el6.x86_64
gcc-gfortran-4.4.7-17.el6.x86_64
以上为安装了依赖包,如未安装可执行以下命令安装[[email protected] soft]#yum install gcc openssl-devel zlib-devel 我在这里是用yum安装的,或者上传tar包手动安装
3 、 下 载 最 新 版 openssh [[email protected] ~]# cd /data/soft/
手动上传tar包或者通过以下命令直接下载tar包[[email protected]]#
wget https://openbsd.hk/pub/OpenBSD/OpenSSH/portable/openssh-7.5p1.tar.gz
wget https://openbsd.mirror.netelligent.ca/pub/OpenBSD/OpenSSH/portable/openssh-7.4p1.tar.gz
4、备份卸载旧openssh: 备份ssh:
[[email protected] ~]# mv /etc/ssh/ /etc/ssh.bak 卸载旧版的openssh
[[email protected] ~]# rpm -e --nodeps `rpm -qa | grep openssh` 卸载后执行
rpm -qa | grep openssh 查看是否卸载干净
5、编译安装openssh: 解压安装包:
[[email protected] soft]# tar -zxf openssh-7.5p1.tar.gz
[[email protected] soft]# cd openssh-7.5p1/
编译:
[[email protected] openssh-7.5p1]# ./configure --prefix=/usr --sysconfdir=/etc/ssh
[[email protected] openssh-7.5p1]# make && make install
查看下安装结果:
[[email protected] openssh-7.5p1]# ssh -V
OpenSSH_7.5p1, OpenSSL 1.0.1e-fips 11 Feb 2013 至此编译安装完成。
6、配置sshd服务:
复制启动文件到/etc/init.d/下并命名为sshd:
[[email protected] openssh-7.5p1]# cp contrib/redhat/sshd.init /etc/init.d/sshd 加入开机启动:
[[email protected] openssh-7.5p1]# chkconfig --add sshd
7、配置允许root使用ssh:
openssh7.5默认root用户是不能用ssh远程登录的,需要修改配置文件: [[email protected] openssh-7.5p1]# vim /etc/ssh/sshd_config
添加如下代码PermitRootLogin yes 重启ssh服务:
[[email protected] openssh-7.5p1]# service sshd restart
至此升级/安装完成。
注:
如果报错:configure: error: *** zlib.h missing - please install first or check config.log
***,需要安装zlib-devel
[[email protected] openssh-7.5p1]# yum install -y zlib-devel
如果报错:configure: error: *** OpenSSL headers missing - please install first or check config.log ***,需要安装openssl-devel
[[email protected] openssh-7.5p1]# yum install -y openssl-devel
原文地址:https://www.cnblogs.com/hunterYi/p/9086259.html