Linux升级openssh过程

 

Linux升级openssh过程

 

之前由于有需要升级到openssh,现在整理下。

1.先安装telnet-server,防止升级openssh过程中出现意外再也无法使用ssh远程。

参考:Linux配置telnet远程登入

2.升级openssl。

参考:Linux升级openssl版本

3.升级openssh过程。

下文详解。

4.确定没问题后禁用telnet-server等服务。

 

openssh升级

官网下载:http://www.openssh.com/       点左下角的链接下载:For other systems:Linux

 

安装依赖包:

前边升级openssl已经安装过了。

yum install  -y gcc gcc-c++ glibc make autoconf pcre-devel  pam-devel automake makedepend perl-Test-Simple perl zlib zlib-devel

  

备份openssh:

mv /usr/bin/ssh /usr/bin/ssh.bak
mv /usr/sbin/sshd /usr/sbin/sshd.bak
mv /etc/ssh /etc/ssh.bak

[root@dm8 ~]# ssh -V
OpenSSH_7.4p1, OpenSSL 1.0.2k-fips  26 Jan 2017
[root@dm8 ~]# mv /usr/bin/ssh /usr/bin/ssh.bak
[root@dm8 ~]# mv /usr/sbin/sshd /usr/sbin/sshd.bak
[root@dm8 ~]# mv /etc/ssh /etc/ssh.bak

  

解压编译和安装:

tar -zxvf openssh-8.7p1.tar.gz
cd openssh-8.7p1
./configure --prefix=/usr/ --sysconfdir=/etc/ssh --with-ssl-dir=/usr/local/ssl --with-zlib --with-md5-passwords --with-pam --with-ssl-engine
make
make install
echo $?
ssh -V
vi /etc/ssh/sshd_config
    添加或修改:
    PermitRootLogin yes
    PasswordAuthentication yes
    UseDNS no
UsePAM yes
cp -a ./contrib/redhat/sshd.init /etc/init.d/sshd cp -a ./contrib/redhat/sshd.pam /etc/pam.d/sshd.pam systemctl stop sshd.service ##不会影响已经连接的会话 mv /usr/lib/systemd/system/sshd.service /usr/lib/systemd/system/sshd.service.bak systemctl daemon-reload /etc/init.d/sshd start cp /run/systemd/generator.late/sshd.service /usr/lib/systemd/system/sshd.service systemctl daemon-reload systemctl restart sshd systemctl status sshd systemctl enable sshd [root@dm8 soft]# tar -zxvf openssh-8.7p1.tar.gz [root@dm8 soft]# cd openssh-8.7p1 [root@dm8 openssh-8.7p1]# ./configure --prefix=/usr/ --sysconfdir=/etc/ssh --with-ssl-dir=/usr/local/ssl --with-zlib --with-md5-passwords --with-pam --with-ssl-engine [root@dm8 openssh-8.7p1]# make [root@dm8 openssh-8.7p1]# make install [root@dm8 openssh-8.7p1]# echo $? [root@dm8 openssh-8.7p1]# ssh -V OpenSSH_8.7p1, OpenSSL 1.1.1k 25 Mar 2021 [root@dm8 openssh-8.7p1]# vi /etc/ssh/sshd_config   添加或修改:   PermitRootLogin yes   PasswordAuthentication yes   UseDNS no [root@dm8 openssh-8.7p1]# cp -a ./contrib/redhat/sshd.init /etc/init.d/sshd [root@dm8 openssh-8.7p1]# cp -a ./contrib/redhat/sshd.pam /etc/pam.d/sshd.pam [root@dm8 openssh-8.7p1]# systemctl stop sshd.service [root@dm8 openssh-8.7p1]# mv /usr/lib/systemd/system/sshd.service /usr/lib/systemd/system/sshd.service.bak [root@dm8 openssh-8.7p1]# systemctl daemon-reload [root@dm8 openssh-8.7p1]# /etc/init.d/sshd start [root@dm8 openssh-8.7p1]# cp /run/systemd/generator.late/sshd.service /usr/lib/systemd/system/sshd.service [root@dm8 openssh-8.7p1]# systemctl daemon-reload [root@dm8 openssh-8.7p1]# systemctl restart sshd [root@dm8 openssh-8.7p1]# systemctl status sshd [root@dm8 openssh-8.7p1]# systemctl enable sshd

 

 

注意:cp -a ./contrib/redhat/sshd.init /etc/init.d/sshd这条指令运行后同时会产生/etc/rc.d/init.d/sshd文件,实际这个是同一个文件。

 

若正常升级,则停止telnet服务并移除。

systemctl stop telnet.socket
systemctl stop xinetd
systemctl disable xinetd 
systemctl disable telnet.socket

  

参考链接:

https://www.cnblogs.com/wangyang0210/p/12552040.html

https://blog.csdn.net/f4112cd/article/details/111151709

http://www.jinbuguo.com/openssh/openssh_install.html

https://www.cnblogs.com/ocp-100/p/10677387.html

posted @ 2021-08-23 14:57  PiscesCanon  阅读(1591)  评论(0编辑  收藏  举报