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15 telnet: User interface to TELNET

Login to a remote system HOST, optionally using a (non-standard) service port PORT:

     telnet [OPTION...] [HOST [PORT]]
-4
--ipv4
Use only IPv4.
-6
--ipv6
Use only IPv6.
-8
--binary
Use an 8-bit data path.
-a
--login
Attempt automatic login.
-c
--no-rc
Do not read the user's file $HOME/.telnetrc.
-d
--debug
Turn on debugging.
-e CHAR
--escape=CHAR
Use CHAR as escape character.
-E
--no-escape
Use no escape character.
-K
--no-login
Do not automatically login to the remote system.
-l USER
--user=USER
Attempt automatic login as USER.
-L
--binary-output
Use an 8-bit data path for output only.
-n FILE
--trace=FILE
Record trace information into FILE.
-r
--rlogin
Display a user-interface similar to that of rlogin.
-x
--encrypt
If possible, encrypt the data stream.
-X ATYPE
--disable-auth=ATYPE
Disable authentication of type ATYPE. Use this option multiple times if more than one type is to be disabled. Standard choices are ‘null’, ‘kerberos_v4’, and ‘kerberos_v5’.