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今天就跟大家聊聊有关怎样进行RHEL6_CentOS6_Openssh8.0p1升级，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。
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创建软件存放目录：
--创建软件存放目录，并上传OS镜像、Openssh相关安装包到soft目录
[root@sshupdate ~]#
mkdir -p /soft
ll /soft/
mount OS系统镜像
mount -o loop /soft/rhel-server-6.9-x86_64-dvd.iso /mnt/
df -h
结果如下：
/soft/rhel-server-6.9-x86_64-dvd.iso
3.7G 3.7G 0 100% /mnt
配置本地YUM源
[root@sshupdate ~]#
mkdir -p /etc/yum.repos.d/yumbak
mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/yumbak/
ll /etc/yum.repos.d/
[root@sshupdate ~]#
[root@sshupdate ~]# vi /etc/yum.conf
[rheldvd]
name=rheldvd
baseurl=file:///mnt
enabled=1
gpgcheck=0
[main]
[root@sshupdate ~]# yum list
Loaded plugins: product-id, refresh-packagekit, search-disabled-repos,
: subscription-manager
This system is not registered with an entitlement server. You can use subscription-manager to register.
Installed Packages
ConsoleKit.x86_64 0.4.1-6.el6 @anaconda-RedHatEnterpriseLinux-201703082046.x86_64/6.9
ConsoleKit-libs.x86_64 0.4.1-6.el6 @anaconda-RedHatEnterpriseLinux-201703082046.x86_64/6.9
[root@sshupdate ~]# ssh -V
OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013
[root@sshupdate ~]#
关闭防火墙
[root@sshupdate ]#
service iptables stop
chkconfig iptables off
chkconfig iptables --list
结果如下：
iptables 0:off 1:off 2:off 3:off 4:off 5:off 6:off
安装及配置telnet
[root@sshupdate ]# yum install telnet* -y
[root@sshupdate ]# vi /etc/xinetd.d/telnet
# default: on
# description: The telnet server serves telnet sessions; it uses \
# unencrypted username/password pairs for authentication.
service telnet
disable = yes --将yes修改为：no
}
[root@sshupdate ]# mv /etc/securetty /etc/securetty.old
[root@sshupdate ]#
service xinetd start
service xinetd restart
chkconfig xinetd on
chkconfig xinetd --list
结果如下：
xinetd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
[root@sshupdate ]#
测试telnet
[root@sshupdate zlib-1.2.11]# telnet 192.168.147.129 或 telnet 192.168.147.129 22
Trying 192.168.147.129...
Connected to 192.168.147.129.
Escape character is '^]'.
Red Hat Enterprise Linux Server release 6.9 (Santiago)
Kernel 2.6.32-696.el6.x86_64 on an x86_64
sshupdate login: root ----输入用户名
Password: ----输入密码
Last login: Thu Jun 20 04:25:56 from 192.168.147.1
[root@sshupdate ~]#
[root@sshupdate ~]# exit --可以退出telnet操作也可以不退出
安装openssh所需要组件
[root@sshupdate ]# yum install gcc pam-devel zlib-devel -y
解压zlib库文件
[root@sshupdate ~]#
cd /soft/openssh-update-8.0p1/
tar -xvzf zlib-1.2.11.tar.gz
cd zlib-1.2.11
配置检查-编译-安装zlib
[root@sshupdate zlib-1.2.11]#
./configure --prefix=/usr&&make&&make install
[root@sshupdate zlib-1.2.11]#
echo '/usr/lib' >> /etc/ld.so.conf
ldconfig
Cat /usr/lib
[root@sshupdate zlib-1.2.11]# ll /usr/lib/libz.so.1
lrwxrwxrwx. 1 root root 14 Jun 20 04:37 /usr/lib/libz.so.1 -> libz.so.1.2.11
[root@sshupdate zlib-1.2.11]# ll /usr/lib/libz.so
lrwxrwxrwx. 1 root root 14 Jun 20 04:37 /usr/lib/libz.so -> libz.so.1.2.11
查看已安装zlib库
[root@sshupdate ]# rpm -qa|grep zlib
zlib-devel-1.2.3-29.el6.x86_64
zlib-1.2.3-29.el6.x86_64
删除旧zlib库
[root@sshupdate ]# rpm -e --nodeps zlib
[root@sshupdate ]#
[root@sshupdate ]# rpm -qa|grep zlib
rpm: error while loading shared libraries: libz.so.1: cannot open shared object file: No such file or directory
[root@sshupdate ]#
升级openssl
[root@sshupdate zlib-1.2.11]# find / -name openssl
/etc/pki/ca-trust/extracted/openssl
/usr/lib64/openssl
/usr/bin/openssl
[root@sshupdate zlib-1.2.11]#
[root@sshupdate zlib-1.2.11]#
mv /usr/lib64/openssl /usr/lib64/openssl.old
mv /usr/bin/openssl /usr/bin/openssl.old
mv /etc/pki/ca-trust/extracted/openssl /etc/pki/ca-trust/extracted/openssl.old
[root@sshupdate zlib-1.2.11]#
cp /usr/lib64/libcrypto.so.10 /usr/lib64/libcrypto.so.10.old
cp /usr/lib64/libssl.so.10 /usr/lib64/libssl.so.10.old
[root@sshupdate zlib-1.2.11]# rpm -qa|grep openssl|xargs
openssl-1.0.1e-57.el6.x86_64
[root@sshupdate ~]#
rpm -qa|grep openssl|xargs -i rpm -e --nodeps {}
rpm -qa|grep openssl |xargs
[root@sshupdate ~]#
cd /soft/openssh-update-8.0p1/
tar -xvzf openssl-1.0.2s.tar.gz
cd openssl-1.0.2s
./config --prefix=/usr/ --openssldir=/etc/ssl --shared zlib
make
make test
make install
查看升级后Openssl版本
[root@sshupdate openssl-1.0.2s]# openssl version
OpenSSL 1.0.2s 28 May 2019
[root@sshupdate openssl-1.0.2s]#
恢复库文件
[root@sshupdate openssl-1.0.2s]#
mv /usr/lib64/libcrypto.so.10.old /usr/lib64/libcrypto.so.10
mv /usr/lib64/libssl.so.10.old /usr/lib64/libssl.so.10
mv /etc/ssh /etc/ssh.old
升级Openssh
rpm -qa|grep openssh
rpm -qa|grep openssh|xargs -i rpm -e --nodeps {}
rpm -qa|grep openssh
install -v -m700 -d /var/lib/sshd
chown -v root:sys /var/lib/sshd/
groupadd -g 50 sshd
useradd -c 'sshd PrivSep' -d /var/lib/sshd -g sshd -s /bin/false -u 50 sshd
[root@sshupdate ]#
cd /soft/openssh-update-8.0p1/
tar -xvzf openssh-8.0p1.tar.gz
cd /soft/openssh-update-8.0p1/openssh-8.0p1
./configure --prefix=/usr --sysconfdir=/etc/ssh --with-md5-passwords --with-pam--with-zlib --with-openssl-includes=/usr --with-privsep-path=/var/lib/sshd ---注：是一行命令；
make
make install
结果如下：
/bin/mkdir -p /etc/ssh
ssh-keygen: generating new host keys: RSA DSA ECDSA ED25519
/usr/sbin/sshd -t -f /etc/ssh/sshd_config
[root@sshupdate openssh-8.0p1]#
[root@sshupdate openssh-8.0p1]#
install -v -m755 contrib/ssh-copy-id /usr/bin/
install -v -m644 contrib/ssh-copy-id.1 /usr/share/man/man1
install -v -m755 -d /usr/share/doc/openssh-8.0p1
install -v -m744 INSTALL LICENCE OVERVIEW README* /usr/share/doc/openssh-8.0p1/
[root@sshupdate openssh-8.0p1]# ssh -V
OpenSSH_8.0p1, OpenSSL 1.0.2s 28 May 2019
[root@sshupdate openssh-8.0p1]#
[root@sshupdate openssh-8.0p1]#
echo "X11Forwarding yes" >> /etc/ssh/sshd_config
echo "PermitRootLogin yes" >> /etc/ssh/sshd_config
cat /etc/ssh/sshd_config
结果如下：
……………………省略…………………………
X11Forwarding yes
PermitRootLogin yes
[root@sshupdate openssh-8.0p1]#
[root@sshupdate openssh-8.0p1]#
cp -p contrib/redhat/sshd.init /etc/init.d/sshd
chmod +x /etc/init.d/sshd
ll /etc/init.d/sshd
chkconfig --add sshd
chkconfig sshd on
chkconfig sshd --list
结果如下：
sshd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
[root@sshupdate openssh-8.0p1]#
[root@sshupdate openssh-8.0p1]# vi /etc/selinux/config
SELINUX=enforcing ----修改enforcing为：disabled --务必修改否则ssh无法正常登录
[root@sshupdate openssh-8.0p1]# reboot
[root@sshupdate ]#
[root@sshupdate ~]# vi /etc/xinetd.d/telnet
# default: on
# description: The telnet server serves telnet sessions; it uses \
# unencrypted username/password pairs for authentication.
service telnet
disable = no --将no修改为：yes
}
[root@sshupdate ~]#
[root@sshupdate ~]# mv /etc/securetty.old /etc/securetty
[root@sshupdate ~]#
service xinetd stop
chkconfig xinetd off
chkconfig xinetd --list
结果如下：
xinetd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
[root@sshupdate ~]#
方法二：
mount -o loop /soft/rhel-server-6.9-x86_64-dvd.iso /mnt/
yum remove telnet* -y
[root@sshupdate ~]#
[root@sshupdate ~]# ssh -V
OpenSSH_8.0p1, OpenSSL 1.0.2s 28 May 2019
[root@sshupdate ~]#
[root@sshupdate ~]#
[root@sshupdate ~]# reboot --重启正常登录即可
[root@sshupdate ~]#
看完上述内容，你们对怎样进行RHEL6_CentOS6_Openssh8.0p1升级有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注创新互联行业资讯频道，感谢大家的支持。