openssh8.4p1升级步骤和安装包 ## telnet安装 ### centos 7 yum install telnet-server.x86_64 yum install telnet.x86_64 yum install xinetd.x86_64 systemctl start telnet.socket systemctl start xinetd ### centos 6 yum install xinetd yum install telnet yum install telnet-server service xinetd start .....