Based on 4 remote management protocols, Linux remote management server software can be divided into the following 3 graphical remote management software similar to VNC (based on RFB protocol), such as Xmanager, VNC VIEWER and TightVNC; command line operation management based on SSH
protocol ;
Similar to Webmin's browser-based remote management, this management method only provides a simple management window and has limited available management functions;
Due to security and stability considerations, most servers abandon the graphical management interface and choose the command line interface. Therefore, remote management of Linux servers often uses the command line management method based on the SSH protocol.
Telnet compared to SSH
Telnet protocol and SSH protocol are both command line remote management protocols, have common application fields, and are often used for remote access to servers.
Compared with the Telnet protocol, the SSH protocol encrypts the data when sending data, making data transmission more secure. Therefore, the SSH protocol replaces the Telnet protocol in almost all application fields.
In some testing situations where encryption is not required (such as local area networks), the Telnet protocol is still often used.