auth argument
enable type- Enable authentication type type. Currently, the only type supported is KERBEROS_V5.
disable type- Disable authentication type type. Currently, the only type supported is KERBEROS_V5.
help- Display help information about the auth command.
status- Display the current types of authentication, and whether they are enabled or disabled.
?- Same as help
close
display argument ...
mode [ type ]
character- Disable the TELNET LINEMODE option; or, if the remote side does not understand the TELNET LINEMODE option, then enter the character at a time mode.
line- Enable the TELNET LINEMODE option; or, if the remote side does not understand the TELNET LINEMODE option, then attempt to enter the old line by line mode.
isig
-isig- Attempt to enable (disable) the TRAPSIG mode of the TELNET LINEMODE option. This requires that the LINEMODE option be enabled.
edit
-edit- Attempt to enable (disable) the EDIT mode of the LINEMODE option. This requires that the LINEMODE option be enabled.
softtabs
-softtabs- Attempt to enable (disable) the SOFT_TAB mode of the LINEMODE option. This requires that the LINEMODE option be enabled.
litecho
-litecho- Attempt to enable (disable) the LIT_ECHO mode of the LINEMODE option. This requires that the LINEMODE option be enabled.
?- Prints out help information for the mode command.
open host [ user ] [ [ - ] port ] [ -a ] [ -l user ]
The -l or the -a option may be used to specify the user name to be passed to the remote system via the ENVIRON option.
When connecting to a non-standard port, telnet will omit the automatic initiation of any TELNET options. When the port number is preceded by a minus sign, the initial option negotiation will be done as follows: After establishing a connection, the file .telnetrc in the user's home directory will be opened. Lines beginning with a ``#'' will be treated as comment lines; blank lines will be ignored. Lines that begin without whitespace will be the start of a machine entry. The first thing on the line will be the name of the machine to which this host is being connected. The rest of the line -- and successive lines which begin with whitespace -- will be assumed to be telnet commands and will be processed as if they had been entered manually in response to the telnet command prompt.
quit
send arguments
abort- Sends the TELNET ABORT (ABORT processes) sequence.
ao- Sends the TELNET AO (Abort Output) sequence which should cause the remote system to flush all output from the remote system to the user's terminal.
ayt- Sends the TELNET AYT (Are You There?) sequence; the remote system may or may not choose to respond to this transmission.
brk- Sends the TELNET BRK (Break) sequence which may have significance to the remote system.
ec- Sends the TELNET EC (Erase Character) sequence which should cause the remote system to erase the last character entered.
el- Sends the TELNET EL (Erase Line) sequence which should cause the remote system to erase the line currently being entered.
eof- Sends the TELNET EOF (End Of File) sequence.
eor- Sends the TELNET EOR (End Of Record) sequence.
escape- Sends the current TELNET escape character (initially ``^]'').
ga- Sends the TELNET GA (Go Ahead) sequence, which probably has no significance to the remote system.
getstatus- If the remote side supports the TELNET STATUS command, getstatus will send the subnegotiation request that the server send its current option status.
ip- Sends the TELNET IP (Interrupt Process) sequence, which should cause the remote system to abort the currently running process.
nop- Sends the TELNET NOP (No Operation) sequence.
susp- Sends the TELNET SUSP (Suspend process) sequence.
synch- Sends the TELNET SYNCH sequence. This sequence causes the remote system to discard all previously typed (but not yet read) input. This sequence will be sent as TCP urgent data (and may not work if the remote system is a 4.2 BSD system; if it does not work, a lowercase ``|'' may be echoed on the terminal).
?- Prints out help information for the send command.
set argument value
unset argument value
echo-
This is the value (initially ``^['') which, when in the
line by line mode, will toggle between doing local echoing
of entered characters (for normal processing) and suppressing
echoing of entered characters (for example, for entering a password).
eof- If telnet is operating in LINEMODE or in the old line by line mode, entering this character as the first character on a line will cause this character to be sent to the remote system. The initial value of the ``eof'' character is taken to be the terminal's eof character.
erase- If telnet is in localchars mode (see ``toggle'' localchars below), and if telnet is operating in the character at a time mode, then when this character is entered, a TELNET EC sequence (see send ec above) will be sent to the remote system. The initial value for the erase character is taken to be the terminal's erase character.
escape- This is the TELNET escape character (initially ``^]'') which causes entry into the TELNET command mode when connected to a remote system.
flushoutput- If telnet is in localchars mode (see toggle localchars below) and the flushoutput character is entered, a TELNET AO sequence (see send ao above) will be sent to the remote host. The initial value for the flush character is taken to be the terminal's flush character.
interrupt- If TELNET is in localchars mode (see toggle localchars below) and the interrupt character is entered, a TELNET IP sequence (see send ip above) will be sent to the remote host. The initial value for the interrupt character is taken to be the terminal's intr character.
kill- If TELNET is in localchars mode (see toggle localchars below), and if TELNET is operating in the character at a time mode, then when this character is entered, a TELNET EL sequence (see send el above) will be sent to the remote system. The initial value for the kill character is taken to be the terminal's kill character.
lnext- If TELNET is operating in LINEMODE or in the old line by line mode, then this character is taken to be the terminal's lnext character. The initial value for the lnext character is taken to be the terminal's lnext character.
quit-
If TELNET is in
localchars mode (see toggle localchars below)
and the quit character is entered, a
TELNET BRK sequence (see send brk above)
will be sent to the remote host.
The initial value for the quit character is taken to be the terminal's
quit character.
reprint- If TELNET is operating in LINEMODE or in the old line by line mode, then this character is taken to be the terminal's reprint character. The initial value for the reprint character is taken to be the terminal's reprint character.
start- If the TELNET TOGGLE-FLOW-CONTROL option has been enabled, then this character is taken to be the terminal's start character. The initial value for the start character is taken to be the terminal's start character.
stop- If the TELNET TOGGLE-FLOW-CONTROL option has been enabled, then this character is taken to be the terminal's stop character. The initial value for the stop character is taken to be the terminal's stop character.
forw1- If TELNET is in the localchars mode, then this character is taken to be an alternate end of line character.
forw2- If TELNET is in the localchars mode, then this character is taken to be an alternate end of line character.
ayt- If TELNET is in the localchars mode, then this character is taken to be the alternate AYT character.
susp- If TELNET is in the localchars mode or if the LINEMODE is enabled and the suspend character is entered, a TELNET SUSP sequence (see send susp above) will be sent to the remote host. The initial value for the suspend character is taken to be the terminal's suspend character.
tracefile- This is the file to which the output generated by the netdata command will be written.
worderase- If TELNET is operating in LINEMODE or in the old line by line mode, then this character is taken to be the terminal's worderase character. The initial value for the worderase character is taken to be the terminal's worderase character.
?- Displays the legal set and unset commands.
slc [ state ]
export-
Switch to the local defaults for the ``special characters''.
The local default characters are those of the local terminal at
the time when telnet was started.
import- Switch to the remote defaults for the ``special characters''. The remote default characters are those of the remote system at the time when the TELNET connection was established.
check- Verify the current settings for the current ``special characters''. The remote side is requested to send all the current special character settings; if there are any discrepancies with the local side, the local side will switch to the set of remote values.
?- Prints out help information for the slc command.
environ [ argument [ ... ] ]
The valid arguments for the environ command are:
define variable value- Define the variable to have a value of value. Any variables defined by this command are automatically exported. The value may be enclosed in single or double quotes so that tabs and embedded spaces may be included.
undefine variable- Remove variable from the list of environment variables.
export variable- Mark the variable to be exported to the remote side.
unexport variable- Mark the variable to not be exported unless explicitly requested by the remote side.
list-
List the current set of environment variables.
Those marked with a ``
'' will be sent automatically;
any other variables will be sent only if requested explicitly.
send variable- Send environment variable.
?- Prints out help information for the environ command.
toggle arguments [ ... ]
The valid arguments are:
autoflush- If autoflush and localchars are both ``TRUE'', then when the ao or the quit characters are recognized (and transformed into TELNET sequences; see set above for details), TELNET will refuse to display any data on the user's terminal until the remote system acknowledges (via a TELNET TIMING MARK option) that it has processed those TELNET sequences. The initial value for this toggle is ``TRUE'' if the terminal user had not executed an stty noflsh; otherwise ``FALSE'' (see stty(C)).
autologin- Same as the -a option on the command line.
toggle authdebug
authdebug- Display verbose debugging information about authentication.
autosynch- If autosynch and localchars are both ``TRUE'', then when either the intr or quit character is entered (see set above for descriptions of the intr and quit characters), the resulting TELNET sequence sent will be followed by the TELNET SYNCH sequence. This procedure should cause the remote system to begin throwing away all previously entered input until both of the TELNET sequences have been read and acted upon. The initial value of this toggle is ``FALSE''.
binary-
Enable or disable the TELNET BINARY
option on both the input and output.
inbinary- Enable or disable the TELNET BINARY option on input.
outbinary- Enable or disable the TELNET BINARY option on output.
crlf- If this toggle value is ``TRUE'', then Carriage Returns will be sent as ``<CR><LF>''. If this is ``FALSE'', then Carriage Returns will be sent as ``<CR><NUL>''. The initial value for this toggle is ``FALSE''.
crmod-
Toggle the Carriage Return mode.
When this mode is enabled, most Carriage Return characters
received from
the remote host will be mapped into a Carriage Return followed by
a Line Feed.
This mode does not affect those characters entered by the user,
but only those received from the remote host.
This mode is not very useful unless the remote host
only sends Carriage Return, but never any Line Feeds.
The initial value for this toggle is ``FALSE''.
debug- Toggles the socket level debugging mode (useful only to root). The initial value for this toggle is ``FALSE''.
localchars-
If this is ``TRUE'', then the
flush, interrupt, quit, erase,
and kill characters (see set
above) are recognized locally and then transformed into appropriate
TELNET control sequences (respectively ao,
ip, brk, ec, and el; see
send above).
The initial value for this toggle is
``TRUE''
in old line by line mode and ``FALSE''
in character at a time mode.
When the LINEMODE option is enabled, the value of localchars is ignored and assumed to always be ``TRUE''. If LINEMODE has ever been enabled, then quit will be sent as abort; eof and suspend will be sent as eof and susp; (see send above).
netdata- Toggles the display of all network data (in hexadecimal format). The initial value for this toggle is ``FALSE''.
options- Toggles the display of some internal telnet protocol processing which pertain to TELNET options. The initial value for this toggle is ``FALSE''.
prettydump-
When the netdata toggle is enabled and if
prettydump is enabled, the output from the
netdata command will be reorganized into a more user-friendly format.
Spaces will be put between each character in the output and the
beginning of any TELNET
escape sequence will be preceded by a ``'' to aid in locating them.
skiprc- Toggle does not process ~/.telnetrc file. The initial value for this toggle is ``FALSE''.
termdata- Toggles printing of hexadecimal terminal data. The initial value for this toggle is ``FALSE''.
?- Displays the legal toggle commands.
<Ctrl>Z
! [ command ]
status
? [ command ]