centos6.5下openssh升级至7.7p1

————-镜像挂载———–

mkdir /media/cdrom

mount /dev/cdrom /media/cdrom

cd /etc/yum.repos.d

mkdir ever_repo

mv *.repo ever_repo/

vi local.repo

[name]

name="local repo"

baseurl=file:///media/cdrom/

enabeld=1

gpgcheck=0

yum clean all

yum makecache

———–安装telnet服务————

yum -y install telnet-server* telnet

vi /etc/xinetd.d/telnet (将其中disable字段的yes改为no以启用telnet服务)

mv /etc/securetty /etc/securetty.old #允许root用户通过telnet登录

service xinetd start #启动telnet服务

chkconfig xinetd on #使telnet服务开机启动，避免升级过程中服务器意外重启后无法远程登录系统

chkconfig iptables off #关闭防火墙永久

service iptables stop #即时生效，重启失效

—————正式升级——–

yum -y install gcc zlib-devel openssl-devel

上传openssh升级包

mkdir /back

mv /etc/ssh/ /back/ssh.back

tar xf openssh-7.7p1.tar.gz

cd openssh-7.7p1/

./configure –prefix=/usr –sysconfdir=/etc/ssh

make

make install

cp /root/openssh-7.7p1/contrib/redhat/sshd.init /etc/init.d/sshd

chkconfig –add sshd

service sshd restart

vi /etc/ssh/sshd_config #(修改配置文件 PermitRootLogin yes PasswordAuthentication yes )

vi /etc/selinux/config (关闭selinux)

setenforce 0 (关闭selinux生效)

getgetenforce (验证 Permissive)

—————-验证openssh没问题后关闭telnet服务——

mv /etc/securetty.old /etc/securetty

chkconfig xinetd off

service xinetd stop

openssh7.7p1tar包