Linux command
telnet 命令
网络
需要网络或远程资源。
常用示例
Connect to a host
telnet [host]
Connect to a host
telnet [host] [port]
Test if a port is open
telnet [host] [80]
Connect with automatic login
telnet -a [host]
Connect as a specific user
telnet -l [username] [host]
Set a custom escape character
telnet -e [^X] [host]
Force IPv4 connection
telnet -4 [host]
说明
telnet is a user interface to the TELNET protocol for communicating with remote hosts. It can connect to any TCP port, making it useful for testing network services beyond traditional terminal access. Without arguments, telnet enters command mode with a telnet> prompt. With a host argument, it attempts to connect immediately. The escape character (default Ctrl+]) returns to command mode during a connection. Common uses include testing web servers (port 80), mail servers (port 25), and verifying if network services are accessible. The protocol transmits data in plaintext without encryption.
参数
- -4
- Force IPv4 address resolution
- -6
- Force IPv6 address resolution
- -8
- Request 8-bit data path
- -a
- Attempt automatic login with current username
- -l _USER_
- Specify username for automatic login
- -e _CHAR_
- Set escape character (default: ^])
- -E
- Disable escape character
- -d
- Enable debug mode
- -n _FILE_
- Record trace information to file
- -K
- Disable automatic login
- -L
- Use 8-bit data path on output only
- -7
- Strip 8th bit on input and output
FAQ
What is the telnet command used for?
telnet is a user interface to the TELNET protocol for communicating with remote hosts. It can connect to any TCP port, making it useful for testing network services beyond traditional terminal access. Without arguments, telnet enters command mode with a telnet> prompt. With a host argument, it attempts to connect immediately. The escape character (default Ctrl+]) returns to command mode during a connection. Common uses include testing web servers (port 80), mail servers (port 25), and verifying if network services are accessible. The protocol transmits data in plaintext without encryption.
How do I run a basic telnet example?
Run `telnet [host]` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does -4 do in telnet?
Force IPv4 address resolution