因为要升级SSH服务,所以想装个telnet,防止ssh升级失败登录不上去,还可以使用telnet登录,telnet和xinetd服务都已安装,如下
[root@app3 ~]# systemctl status telnet.socket
● telnet.socket - Telnet Server Activation Socket
Loaded: loaded (/usr/lib/systemd/system/telnet.socket; enabled; vendor preset: disabled)
Active: active (listening) since Mon 2024-05-20 08:44:58 CST; 28min ago
Docs: man:telnetd(8)
Listen: [::]:23 (Stream)
Accepted: 0; Connected: 0
May 20 08:44:58 app3 systemd[1]: Listening on Telnet Server Activation Socket.
[root@app3 ~]# systemctl status xinetd
● xinetd.service - Xinetd A Powerful Replacement For Inetd
Loaded: loaded (/usr/lib/systemd/system/xinetd.service; enabled; vendor preset: enabled)
Active: active (running) since Mon 2024-05-20 08:40:21 CST; 32min ago
Main PID: 133810 (xinetd)
CGroup: /system.slice/xinetd.service
└─133810 /usr/sbin/xinetd -stayalive -pidfile /var/run/xinetd.pid
May 20 08:40:21 app3 xinetd[133810]: removing discard
May 20 08:40:21 app3 xinetd[133810]: removing discard
May 20 08:40:21 app3 xinetd[133810]: removing echo
May 20 08:40:21 app3 xinetd[133810]: removing echo
May 20 08:40:21 app3 xinetd[133810]: removing tcpmux
May 20 08:40:21 app3 xinetd[133810]: removing time
May 20 08:40:21 app3 xinetd[133810]: removing time
May 20 08:40:21 app3 xinetd[133810]: xinetd Version 2.3.15 started with libwrap loadavg labeled-networking options compiled in.
May 20 08:40:21 app3 xinetd[133810]: Started working: 0 available services
May 20 08:40:21 app3 systemd[1]: Started Xinetd A Powerful Replacement For Inetd.
但是服务器还是无法telnet登录成功,firewall防火墙已关闭,不知道为什么,谢谢