经过同事验证,RHEL5.8自带的openssh版本是4.3, 能升级到的较高版本为7.6. 本文基于内网,如政府网络条件进行的升级.能访问互联网进行yum的就不需要自行创建源等操作了.
创建源
1、创建文件夹
mkdir -p /media/RHEL5
2、挂载ISO镜像
mount -t iso9660 -o loop /App/Software/RHEL5.10.iso /media/RHEL5
建议把ISO文件内容拷贝到本地。
3、创建文件：/etc/yum.repos.d/RHEL5.repo
[rhel5]
name=rhel5
baseurl=file:///media/RHEL_5.10%20x86_64%20DVD/
enabled=1
gpgcheck=0
4、清除yum缓存
yum clean all
yum makecache
开启telnet
本步骤用于预防ssh安装失败导致系统无法ssh访问时,还能用telnet进入系统进行恢复.
主要参考 https://blog.csdn.net/yygg329405/article/details/80387759
yum install telnet-server
vi /etc/xinetd.d/telnet
把 disable = no改成 disable = yes
chkconfig telnet on
加入开机启动
chkconfig --add telnet
调整telnet登陆限制
vi /etc/securetty
添加
pts/1
pts/2
pts/3
pts/4
pts/5
激活telnet服务
/etc/init.d/xinetd restart
telnet成功.
安装依赖包
Rpm形式安装
rpm -ivh libstdc++-devel-4.1.2-52.el5.x86_64.rpm
rpm -ivh kernel-headers-2.6.18-308.el5.x86_64.rpm
rpm -ivh glibc-headers-2.5-81.x86_64.rpm
rpm -ivh glibc-devel-2.5-81.x86_64.rpm
rpm -ivh e2fsprogs-devel-1.39-33.el5.x86_64.rpm
rpm -ivh keyutils-libs-devel-1.2-1.el5.x86_64.rpm
rpm -ivh libsepol-devel-1.15.2-3.el5.x86_64.rpm
rpm -ivh libselinux-devel-1.33.4-5.7.el5.x86_64.rpm
rpm -ivh krb5-devel-1.6.1-70.el5.x86_64.rpm
rpm -ivh zlib-devel-1.2.3-4.el5.x86_64.rpm
rpm -ivh openssl-devel-0.9.8e-22.el5.x86_64.rpm
rpm -ivh pam-devel-0.99.6.2-6.el5_5.2.x86_64.rpm
yum 形式安装
yum install libstdc++-devel
yum install kernel-headers
yum install glibc-headers
yum install glibc-devel
yum install e2fsprogs-devel
yum install keyutils-libs-devel
yum install libsepol-devel
yum install libselinux-devel
yum install krb5-devel
yum install zlib-devel
yum install openssl-devel
yum install pam-devel
yum install gcc*
安装及配置openssl
安装
(http://blog.csdn.net/maryzhao1985/article/details/8874483、https://wenku.baidu.com/view/3763581a1711cc7931b716dd.html)
说明：貌似RHEL5.8版本最高只能安装“openssl-1.0.2m”这个版本的openssl，安装“openssl-1.1.0g”这个高版本的需要perl的版本是5.10及以上。
./config --prefix=/opt/openssl --shared
make
make test
make install
配置
cd /usr/bin/
mv openssl openssl.old.backup.20171128
ln –s /opt/openssl/bin/openssl openssl
ln -s /opt/openssl/bin/openssl openssl
验证：
执行：openssl version
表示已经安装完成。
安装zlib
./configure --prefix=/opt/zlib
make
make install
echo "/opt/openssl/lib/" >> /etc/ld.so.conf
ldconfig
安装及配置openssh
安装
Cd /usr/local/software/ssh/openssh-7.6p1
./configure --prefix=/opt/openssh --without-openssl-header-check --sysconfdir=/etc/ssh --with-pam --with-ssl-dir=/opt/openssl --with-md5-passwords --mandir=/usr/share/man --with-zlib=/opt/zlib
make clean
make
make test
make install
配置
service sshd stop
cd /usr/bin/
mv ssh ssh.old.backup.20171128
ln -s /opt/openssh/bin/ssh ssh
mv ssh-keygen ssh-keygen.old.backup.20171128
ln -s /opt/openssh/bin/ssh-keygen ssh-keygen
cd /usr/sbin/
mv sshd sshd.old.backup.20171128
ln -s /opt/openssh/sbin/sshd sshd
cp /etc/ssh/ssh_config /etc/ssh/ssh_config.20171128
cp /etc/ssh/sshd_config /etc/ssh/sshd_config.20171128
cp /etc/ssh/moduli /etc/ssh/moduli.20171128
cp /etc/ssh/ssh_host_key /etc/ssh/ssh_host_key.20171128
cp /etc/ssh/ssh_host_dsa_key /etc/ssh/ssh_host_dsa_key.20171128
cp /etc/ssh/ssh_host_rsa_key /etc/ssh/ssh_host_rsa_key.20171128
cp /etc/ssh/ssh_host_ed25519_key /etc/ssh/ssh_host_ed25519_key.20171128
vi /etc/ssh/sshd_config
PermitRootLogin yes
service sshd restart
清除多余配置
恢复telnet的配置.
关闭telnet服务,
