因openssh扫描存在漏洞，基于安全考虑，需要将openssh升级为openssh_7.9p1，因为升级过长所以要谨慎操作。本文讲的步骤是在Centos7.9系统、原openssh是系统安装时自带的7.4版本基础上进行升级（其他版本类似），建议生成环境要先做测试，之后再在生产环境升级。

一、升级说明

1、升级OpenSSH后，原有公钥失效，信任关系需要重新配置；

2、升级过程需要停止sshd服务，会导致ssh和sftp无法使用；

3、升级需要关闭防火墙服务；

4、升级需要关闭selinux服务；

5、升级前需要开启telnet，防止升级失败，系统无法登录，对应的防火墙需要开启23端口，安装需要telnet相关包（推荐通过系统ISO安装）

6、升级过程中需要刷新lib库：ldconfig -v；

7、升级顺序：顺序是zlib库-> openssl -> openssh；

8、升级需要gcc、make、perl、zlib、zlib-devel、pam、pam-devel依赖包；

二、安装包准备

需要准备的安装包（点击可本地下载）：

三、安装并启用Telnet

1、安装telnet服务端

yum -y install xinetd telnet-server
yum -y install xinetd telnet-server
yum -y install xinetd telnet-server

2、允许root登录远程telnet

默认情况下，系统是不允许root用户telnet远程登录的。如果要使用root用户直接登录，需设置如下内容。或者可以添加一个可以登录的用户，登录并su到root用户（建议采用此方法，保证系统安全）。此步骤可跳过！

允许root用户通过telnet登陆：

编辑/etc/pam.d/login，注释掉下面这行

vi /etc/pam.d/login

#auth [user_unknown=ignore success=ok ignore=ignore default=bad] pam_securetty.so

3、添加超级用户登陆设备至/etc/securetty文件

cp /etc/securetty /etc/securetty.bak
echo "pts/0" >> /etc/securetty
echo "pts/1" >> /etc/securetty
echo "pts/2" >> /etc/securetty
cp /etc/securetty /etc/securetty.bak
echo "pts/0" >> /etc/securetty
echo "pts/1" >> /etc/securetty
echo "pts/2" >> /etc/securetty
cp /etc/securetty /etc/securetty.bak
echo "pts/0" >> /etc/securetty
echo "pts/1" >> /etc/securetty
echo "pts/2" >> /etc/securetty

4、开启root用户远程登陆。此步骤可跳过!

编辑/etc/pam.d/remote，注释下列这行：

vi /etc/pam.d/remote

#auth required pam_securetty.so

5、重启telnet和xinetd服务【telnet服务依赖于xinetd服务】

systemctl restart telnet.socket
systemctl restart xinetd
systemctl restart telnet.socket
systemctl restart xinetd
systemctl restart telnet.socket
systemctl restart xinetd

PS：如果开启了防火墙，需要将23端口（系统默认23为telnet端口）添加到防火墙允许的端口的列表中。

四、安装升级

（1）、升级前环境准备

1、将上文下载的三个文件上传至服务器，目录可自行设定，方便即可。

2、关闭系统防火墙

systemctl stop firewalld.service
systemctl stop firewalld.service
systemctl stop firewalld.service

3、关闭SElinux

sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config && setenforce 0 && /usr/sbin/sestatus -v 
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config && setenforce 0 && /usr/sbin/sestatus -v 
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config && setenforce 0 && /usr/sbin/sestatus -v 

4、安装相关依赖包

yum -y install gcc make perl zlib zlib-devel pam pam-devel
yum -y install gcc make perl zlib zlib-devel pam pam-devel
yum -y install gcc make perl zlib zlib-devel pam pam-devel

安装完毕后执行下面命令，确保所有依赖包正常安装

rpm -qa | egrep "gcc|make|perl|zlib|zlib-devel|pam|pam-devel"
rpm -qa | egrep "gcc|make|perl|zlib|zlib-devel|pam|pam-devel"
rpm -qa | egrep "gcc|make|perl|zlib|zlib-devel|pam|pam-devel"

（2）、升级openSSH（注意从这步开始，通过Telnet登录到服务器，务必）

1、停止ssh服务

systemctl stop sshd
systemctl stop sshd
systemctl stop sshd

备份ssh配置文件

cp -r /etc/ssh /etc/ssh.old 
cp -r /etc/ssh /etc/ssh.old 
cp -r /etc/ssh /etc/ssh.old 

2、查看系统原有openssh包

rpm -qa | grep openssh
rpm -qa | grep openssh
rpm -qa | grep openssh

根据上面查询出的结果，卸载系统里原有Openssh（一般有三个包，全部卸载）

rpm -e --nodeps  xxxxxxxxxx
rpm -e --nodeps  xxxxxxxxxx
rpm -e --nodeps  xxxxxxxxxx

卸载完成后执行rpm -qa | grep openssh，确保没有回显

3、编译安装zlib

解压刚才上传到服务器的zlib-1.2.11.tar.gz，并进行编译安装

wget https://www.cmdeye.com/wp-content/uploads/shell/openssl/zlib-1.2.11.tar.gz
tar -xzvf zlib-1.2.11.tar.gz
cd zlib-1.2.11
./configure --prefix=/usr/local/zlib
wget https://www.cmdeye.com/wp-content/uploads/shell/openssl/zlib-1.2.11.tar.gz

tar -xzvf zlib-1.2.11.tar.gz
cd zlib-1.2.11
./configure --prefix=/usr/local/zlib
wget https://www.cmdeye.com/wp-content/uploads/shell/openssl/zlib-1.2.11.tar.gz

tar -xzvf zlib-1.2.11.tar.gz
cd zlib-1.2.11
./configure --prefix=/usr/local/zlib

如果报错类似下图所示，请安装gcc

make&&make install
make&&make install
make&&make install

验证zlib安装是否成功，要包含include、lib、share三个目录。

ll /usr/local/zlib
ll /usr/local/zlib
ll /usr/local/zlib

新建并编辑配置文件：
vi /etc/ld.so.conf.d/zlib.conf 
加入如下内容后保存退出
/usr/local/zlib/lib 
刷新库文件，加载刚才编译安装的zlib生成的库文件
ldconfig -v
新建并编辑配置文件：
vi /etc/ld.so.conf.d/zlib.conf 
加入如下内容后保存退出
/usr/local/zlib/lib 
刷新库文件，加载刚才编译安装的zlib生成的库文件
ldconfig -v
新建并编辑配置文件：
vi /etc/ld.so.conf.d/zlib.conf 
加入如下内容后保存退出
/usr/local/zlib/lib 
刷新库文件，加载刚才编译安装的zlib生成的库文件
ldconfig -v

4、编译安装openssl

解压安装openssl包，并进行编译安装

wget https://www.cmdeye.com/wp-content/uploads/shell/openssl/openssl-1.0.2o.tar.gz
tar -xzvf openssl-1.0.2o.tar.gz
cd openssl-1.0.2o
./config shared zlib
make      （时间比较长，切勿打断）
make test    （时间比较长，切勿打断）
make install     （时间比较长，切勿打断）
重命名现有文件目录
mv /usr/bin/openssl /usr/bin/openssl.bak
创建ssl相关软连接
ln -s /usr/local/ssl/bin/openssl /usr/bin/openssl
ln -s /usr/local/ssl/include/openssl /usr/include/openssl
编辑配置文件
vi /etc/ld.so.conf.d/ssl.conf
加入如下内容后保存退出
/usr/local/ssl/lib
刷新库文件，加载刚才编译安装的ssl生成的库文件
ldconfig -v
查看openssl版本
openssl version -a
wget https://www.cmdeye.com/wp-content/uploads/shell/openssl/openssl-1.0.2o.tar.gz
tar -xzvf openssl-1.0.2o.tar.gz
cd openssl-1.0.2o
./config shared zlib
make      （时间比较长，切勿打断）
make test    （时间比较长，切勿打断）
make install     （时间比较长，切勿打断）
重命名现有文件目录
mv /usr/bin/openssl /usr/bin/openssl.bak
创建ssl相关软连接
ln -s /usr/local/ssl/bin/openssl /usr/bin/openssl
ln -s /usr/local/ssl/include/openssl /usr/include/openssl
编辑配置文件
vi /etc/ld.so.conf.d/ssl.conf
加入如下内容后保存退出
/usr/local/ssl/lib
刷新库文件，加载刚才编译安装的ssl生成的库文件
ldconfig -v
查看openssl版本
openssl version -a
wget https://www.cmdeye.com/wp-content/uploads/shell/openssl/openssl-1.0.2o.tar.gz
tar -xzvf openssl-1.0.2o.tar.gz
cd openssl-1.0.2o
./config shared zlib
make      （时间比较长，切勿打断）
make test    （时间比较长，切勿打断）
make install     （时间比较长，切勿打断）
重命名现有文件目录
mv /usr/bin/openssl /usr/bin/openssl.bak
创建ssl相关软连接
ln -s /usr/local/ssl/bin/openssl /usr/bin/openssl
ln -s /usr/local/ssl/include/openssl /usr/include/openssl
编辑配置文件
vi /etc/ld.so.conf.d/ssl.conf
加入如下内容后保存退出
/usr/local/ssl/lib
刷新库文件，加载刚才编译安装的ssl生成的库文件
ldconfig -v
查看openssl版本
openssl version -a

5、升级openssh，编译安装

wget https://www.cmdeye.com/wp-content/uploads/shell/openssl/openssh-7.9p1.tar.gz
tar -zxvf openssh-7.9p1.tar.gz
cd openssh-7.9p1
./configure --prefix=/usr --sysconfdir=/etc/ssh --with-md5-passwords --with-privsep-path=/var/lib/sshd
make
修改文件权限
chmod 600 /etc/ssh/ssh_host_rsa_key
chmod 600 /etc/ssh/ssh_host_ecdsa_key
chmod 600 /etc/ssh/ssh_host_ed25519_key
make install
wget https://www.cmdeye.com/wp-content/uploads/shell/openssl/openssh-7.9p1.tar.gz
tar -zxvf openssh-7.9p1.tar.gz
cd openssh-7.9p1
./configure --prefix=/usr --sysconfdir=/etc/ssh --with-md5-passwords --with-privsep-path=/var/lib/sshd
make
修改文件权限
chmod 600 /etc/ssh/ssh_host_rsa_key
chmod 600 /etc/ssh/ssh_host_ecdsa_key
chmod 600 /etc/ssh/ssh_host_ed25519_key
make install
wget https://www.cmdeye.com/wp-content/uploads/shell/openssl/openssh-7.9p1.tar.gz
tar -zxvf openssh-7.9p1.tar.gz
cd openssh-7.9p1
./configure --prefix=/usr --sysconfdir=/etc/ssh --with-md5-passwords --with-privsep-path=/var/lib/sshd
make
修改文件权限
chmod 600 /etc/ssh/ssh_host_rsa_key
chmod 600 /etc/ssh/ssh_host_ecdsa_key
chmod 600 /etc/ssh/ssh_host_ed25519_key
make install

修改配置文件，允许root直接登录

echo "PasswordAuthentication yes"   >> /etc/ssh/sshd_config
echo "PermitRootLogin yes" >> /etc/ssh/sshd_config
echo "PasswordAuthentication yes"   >> /etc/ssh/sshd_config
echo "PermitRootLogin yes" >> /etc/ssh/sshd_config
echo "PasswordAuthentication yes"   >> /etc/ssh/sshd_config
echo "PermitRootLogin yes" >> /etc/ssh/sshd_config

ssh服务必须开机自启动，因此要进行一些设置

cp -p contrib/redhat/sshd.init /etc/init.d/sshd
chmod +x /etc/init.d/sshd
chkconfig --add sshd
chkconfig sshd on
systemctl restart sshd
cp -p contrib/redhat/sshd.init /etc/init.d/sshd
chmod +x /etc/init.d/sshd
chkconfig --add sshd
chkconfig sshd on
systemctl restart sshd
cp -p contrib/redhat/sshd.init /etc/init.d/sshd
chmod +x /etc/init.d/sshd
chkconfig --add sshd
chkconfig sshd on
systemctl restart sshd

验证ssh版本

ssh -V
ssh -V
ssh -V

ssh登录测试，可以成功登录。

openssh版本升级完成！

如果之前是rpm包安装的。并且按照以上步骤操作，可以直接以下命令进行回滚

# yum -y install openssh-clients
# yum -y install openssh-server
# yum -y install openssh
# yum -y install openssh-clients
# yum -y install openssh-server
# yum -y install openssh
# yum -y install openssh-clients
# yum -y install openssh-server
# yum -y install openssh

关闭telnet

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

Centos7 升级SSH 到7.9p1的脚本

请根据自己实际情况运行脚本 有很大风险导致连不上SSH

#!/bin/bash
 
clear
echo ------------------------------------------
echo        CentOS7 openssh升级到7.9p1
echo         生产环境使用前请做好测试
echo ------------------------------------------
sleep 5s
clear
echo 安装进程开始
sleep 1s
clear
echo 安装进程开始  3
sleep 1s
clear
echo 安装进程开始  3  2
sleep 1s
clear
echo 安装进程开始  3  2  1
sleep 1s
clear
echo 安装并启动telnet服务端
sleep 2s
yum -y install xinetd telnet-server
cp /etc/securetty /etc/securetty.bak
echo "pts/0" >> /etc/securetty
echo "pts/1" >> /etc/securetty
systemctl restart telnet.socket &&  systemctl restart xinetd
sleep 1s
clear
echo 关闭SElinux并禁用……
sleep 2s
setenforce 0
sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config
cat /etc/selinux/config
sleep 2s
clear
echo 安装程序依赖包……
sleep 2s
yum -y install gcc make perl zlib zlib-devel pam pam-devel
sleep 1s
clear
echo 停止并卸载原有ssh
sleep 2s
systemctl stop sshd
cp -r /etc/ssh /etc/ssh.old
rpm -qa | grep openssh
sleep 1s
rpm -e `rpm -qa | grep openssh` --nodeps
rpm -qa | grep openssh
sleep 1s
clear
echo 安装zlib
sleep 2s
wget https://www.cmdeye.com/wp-content/uploads/shell/openssl/zlib-1.2.11.tar.gz
tar -zxvf zlib-1.2.11.tar.gz 
cd zlib-1.2.11
./configure --prefix=/usr/local/zlib && make && make install
ls -l /usr/local/zlib
sleep 1s
clear
echo 配置zlib
echo "/usr/local/zlib/lib" >> /etc/ld.so.conf.d/zlib.conf
ldconfig -v
cd ..
sleep 1s
clear
echo 安装openssl
sleep 2s
wget https://www.cmdeye.com/wp-content/uploads/shell/openssl/openssl-1.0.2o.tar.gz
tar -zxvf openssl-1.0.2o.tar.gz
cd openssl-1.0.2o
./config shared zlib && make && make install
sleep 1s
clear
echo 配置openssl
sleep 2s
mv /usr/bin/openssl /usr/bin/openssl.bak
ln -s /usr/local/ssl/bin/openssl /usr/bin/openssl
ln -s /usr/local/ssl/include/openssl /usr/include/openssl
echo "/usr/local/ssl/lib" >> /etc/ld.so.conf.d/ssl.conf
ldconfig -v
openssl version -a
cd ..
sleep 1s
clear
echo 安装openssh
sleep 2s
wget https://www.cmdeye.com/wp-content/uploads/shell/openssl/openssh-7.9p1.tar.gz
tar -zxvf openssh-7.9p1.tar.gz
cd openssh-7.9p1
./configure --prefix=/usr --sysconfdir=/etc/ssh --with-md5-passwords --with-privsep-path=/var/lib/sshd
make
sleep 1s
chmod 600 /etc/ssh/ssh_host_rsa_key
chmod 600 /etc/ssh/ssh_host_ecdsa_key
chmod 600 /etc/ssh/ssh_host_ed25519_key
make install
sleep 1s
clear
echo 配置openssh
sleep 2s
echo "PasswordAuthentication yes"   >> /etc/ssh/sshd_config
echo "PermitRootLogin yes" >> /etc/ssh/sshd_config
cp -p contrib/redhat/sshd.init /etc/init.d/sshd
chmod +x /etc/init.d/sshd
chkconfig --add sshd
chkconfig sshd on
systemctl restart sshd
systemctl status sshd
sleep 1s
clear
echo 关闭并禁用telnet
sleep 1s
systemctl stop telnet.socket &&  systemctl stop xinetd
systemctl disable telnet.socket &&  systemctl disable xinetd
clear
echo 安装进程结束
sleep 3s
ssh -V
#!/bin/bash
 
clear
echo ------------------------------------------
echo        CentOS7 openssh升级到7.9p1
echo         生产环境使用前请做好测试
echo ------------------------------------------
sleep 5s
clear
echo 安装进程开始
sleep 1s
clear
echo 安装进程开始  3
sleep 1s
clear
echo 安装进程开始  3  2
sleep 1s
clear
echo 安装进程开始  3  2  1
sleep 1s
clear
echo 安装并启动telnet服务端
sleep 2s
yum -y install xinetd telnet-server
cp /etc/securetty /etc/securetty.bak
echo "pts/0" >> /etc/securetty
echo "pts/1" >> /etc/securetty
systemctl restart telnet.socket &&  systemctl restart xinetd
sleep 1s
clear
echo 关闭SElinux并禁用……
sleep 2s
setenforce 0
sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config
cat /etc/selinux/config
sleep 2s
clear
echo 安装程序依赖包……
sleep 2s
yum -y install gcc make perl zlib zlib-devel pam pam-devel
sleep 1s
clear
echo 停止并卸载原有ssh
sleep 2s
systemctl stop sshd
cp -r /etc/ssh /etc/ssh.old
rpm -qa | grep openssh
sleep 1s
rpm -e `rpm -qa | grep openssh` --nodeps
rpm -qa | grep openssh
sleep 1s
clear
echo 安装zlib
sleep 2s
wget https://www.cmdeye.com/wp-content/uploads/shell/openssl/zlib-1.2.11.tar.gz
tar -zxvf zlib-1.2.11.tar.gz 
cd zlib-1.2.11
./configure --prefix=/usr/local/zlib && make && make install
ls -l /usr/local/zlib
sleep 1s
clear
echo 配置zlib
echo "/usr/local/zlib/lib" >> /etc/ld.so.conf.d/zlib.conf
ldconfig -v
cd ..
sleep 1s
clear
echo 安装openssl
sleep 2s
wget https://www.cmdeye.com/wp-content/uploads/shell/openssl/openssl-1.0.2o.tar.gz
tar -zxvf openssl-1.0.2o.tar.gz
cd openssl-1.0.2o
./config shared zlib && make && make install
sleep 1s
clear
echo 配置openssl
sleep 2s
mv /usr/bin/openssl /usr/bin/openssl.bak
ln -s /usr/local/ssl/bin/openssl /usr/bin/openssl
ln -s /usr/local/ssl/include/openssl /usr/include/openssl
echo "/usr/local/ssl/lib" >> /etc/ld.so.conf.d/ssl.conf
ldconfig -v
openssl version -a
cd ..
sleep 1s
clear
echo 安装openssh
sleep 2s
wget https://www.cmdeye.com/wp-content/uploads/shell/openssl/openssh-7.9p1.tar.gz
tar -zxvf openssh-7.9p1.tar.gz
cd openssh-7.9p1
./configure --prefix=/usr --sysconfdir=/etc/ssh --with-md5-passwords --with-privsep-path=/var/lib/sshd
make
sleep 1s
chmod 600 /etc/ssh/ssh_host_rsa_key
chmod 600 /etc/ssh/ssh_host_ecdsa_key
chmod 600 /etc/ssh/ssh_host_ed25519_key
make install
sleep 1s
clear
echo 配置openssh
sleep 2s
echo "PasswordAuthentication yes"   >> /etc/ssh/sshd_config
echo "PermitRootLogin yes" >> /etc/ssh/sshd_config
cp -p contrib/redhat/sshd.init /etc/init.d/sshd
chmod +x /etc/init.d/sshd
chkconfig --add sshd
chkconfig sshd on
systemctl restart sshd
systemctl status sshd
sleep 1s
clear
echo 关闭并禁用telnet
sleep 1s
systemctl stop telnet.socket &&  systemctl stop xinetd
systemctl disable telnet.socket &&  systemctl disable xinetd
clear
echo 安装进程结束
sleep 3s
ssh -V
#!/bin/bash
 
clear
echo ------------------------------------------
echo        CentOS7 openssh升级到7.9p1
echo         生产环境使用前请做好测试
echo ------------------------------------------
sleep 5s
clear
echo 安装进程开始
sleep 1s
clear
echo 安装进程开始  3
sleep 1s
clear
echo 安装进程开始  3  2
sleep 1s
clear
echo 安装进程开始  3  2  1
sleep 1s
clear
echo 安装并启动telnet服务端
sleep 2s
yum -y install xinetd telnet-server
cp /etc/securetty /etc/securetty.bak
echo "pts/0" >> /etc/securetty
echo "pts/1" >> /etc/securetty
systemctl restart telnet.socket &&  systemctl restart xinetd
sleep 1s
clear
echo 关闭SElinux并禁用……
sleep 2s
setenforce 0
sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config
cat /etc/selinux/config
sleep 2s
clear
echo 安装程序依赖包……
sleep 2s
yum -y install gcc make perl zlib zlib-devel pam pam-devel
sleep 1s
clear
echo 停止并卸载原有ssh
sleep 2s
systemctl stop sshd
cp -r /etc/ssh /etc/ssh.old
rpm -qa | grep openssh
sleep 1s
rpm -e `rpm -qa | grep openssh` --nodeps
rpm -qa | grep openssh
sleep 1s
clear
echo 安装zlib
sleep 2s
wget https://www.cmdeye.com/wp-content/uploads/shell/openssl/zlib-1.2.11.tar.gz
tar -zxvf zlib-1.2.11.tar.gz 
cd zlib-1.2.11
./configure --prefix=/usr/local/zlib && make && make install
ls -l /usr/local/zlib
sleep 1s
clear
echo 配置zlib
echo "/usr/local/zlib/lib" >> /etc/ld.so.conf.d/zlib.conf
ldconfig -v
cd ..
sleep 1s
clear
echo 安装openssl
sleep 2s
wget https://www.cmdeye.com/wp-content/uploads/shell/openssl/openssl-1.0.2o.tar.gz
tar -zxvf openssl-1.0.2o.tar.gz
cd openssl-1.0.2o
./config shared zlib && make && make install
sleep 1s
clear
echo 配置openssl
sleep 2s
mv /usr/bin/openssl /usr/bin/openssl.bak
ln -s /usr/local/ssl/bin/openssl /usr/bin/openssl
ln -s /usr/local/ssl/include/openssl /usr/include/openssl
echo "/usr/local/ssl/lib" >> /etc/ld.so.conf.d/ssl.conf
ldconfig -v
openssl version -a
cd ..
sleep 1s
clear
echo 安装openssh
sleep 2s
wget https://www.cmdeye.com/wp-content/uploads/shell/openssl/openssh-7.9p1.tar.gz
tar -zxvf openssh-7.9p1.tar.gz
cd openssh-7.9p1
./configure --prefix=/usr --sysconfdir=/etc/ssh --with-md5-passwords --with-privsep-path=/var/lib/sshd
make
sleep 1s
chmod 600 /etc/ssh/ssh_host_rsa_key
chmod 600 /etc/ssh/ssh_host_ecdsa_key
chmod 600 /etc/ssh/ssh_host_ed25519_key
make install
sleep 1s
clear
echo 配置openssh
sleep 2s
echo "PasswordAuthentication yes"   >> /etc/ssh/sshd_config
echo "PermitRootLogin yes" >> /etc/ssh/sshd_config
cp -p contrib/redhat/sshd.init /etc/init.d/sshd
chmod +x /etc/init.d/sshd
chkconfig --add sshd
chkconfig sshd on
systemctl restart sshd
systemctl status sshd
sleep 1s
clear
echo 关闭并禁用telnet
sleep 1s
systemctl stop telnet.socket &&  systemctl stop xinetd
systemctl disable telnet.socket &&  systemctl disable xinetd
clear
echo 安装进程结束
sleep 3s
ssh -V