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stty - Unix, Linux Command


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NAME

stty - change and print terminal line settings

SYNOPSIS

stty [-F DEVICE] [--file=DEVICE] [SETTING]...
stty [-F DEVICE] [--file=DEVICE] [-a|--all]
stty [-F DEVICE] [--file=DEVICE] [-g|--save]

DESCRIPTION

Print or change terminal characteristics.

TagDescription
-a, --all print all current settings in human-readable form
-g, --save print all current settings in a stty-readable form
-F, --file=DEVICE
  open and use the specified DEVICE instead of stdin
--help display this help and exit
--version
  output version information and exit
Optional - before SETTING indicates negation. An * marks non-POSIX settings. The underlying system defines which settings are available.

Special characters:

TagDescription
* dsusp CHAR
  CHAR will send a terminal stop signal once input flushed
eof CHAR
  CHAR will send an end of file (terminate the input)
eol CHAR
  CHAR will end the line
* eol2 CHAR
  alternate CHAR for ending the line
erase CHAR
  CHAR will erase the last character typed
intr CHAR
  CHAR will send an interrupt signal
kill CHAR
  CHAR will erase the current line
* lnext CHAR
  CHAR will enter the next character quoted
quit CHAR
  CHAR will send a quit signal
* rprnt CHAR
  CHAR will redraw the current line
start CHAR
  CHAR will restart the output after stopping it
stop CHAR
  CHAR will stop the output
susp CHAR
  CHAR will send a terminal stop signal
* swtch CHAR
  CHAR will switch to a different shell layer
* werase CHAR
  CHAR will erase the last word typed

Special settings:

TagDescription
N set the input and output speeds to N bauds
* cols N
  tell the kernel that the terminal has N columns
* columns N
  same as cols N
ispeed N
  set the input speed to N
* line N
  use line discipline N
min N with -icanon, set N characters minimum for a completed read
ospeed N
  set the output speed to N
* rows N
  tell the kernel that the terminal has N rows
* size print the number of rows and columns according to the kernel
speed print the terminal speed
time N with -icanon, set read timeout of N tenths of a second

Control settings:

TagDescription
[-]clocal
  disable modem control signals
[-]cread allow input to be received
* [-]crtscts
  enable RTS/CTS handshaking (disables DTR/DSR)
* [-]cdtrdsr
  enable DTR/DSR handshaking (disables RTS/CTS), no stty readable form available, has to be supported by device
csN set character size to N bits, N in [5..8]
[-]cstopb
  use two stop bits per character (one with ‘-’)
[-]hup send a hangup signal when the last process closes the tty
[-]hupcl same as [-]hup
[-]parenb
  generate parity bit in output and expect parity bit in input
[-]parodd
  set odd parity (even with ‘-’)

Input settings:

TagDescription
[-]brkint
  breaks cause an interrupt signal
[-]icrnl translate carriage return to newline
[-]ignbrk
  ignore break characters
[-]igncr ignore carriage return
[-]ignpar
  ignore characters with parity errors
* [-]imaxbel
  beep and do not flush a full input buffer on a character
[-]inlcr translate newline to carriage return
[-]inpck enable input parity checking
[-]istrip
  clear high (8th) bit of input characters
* [-]iutf8
  assume input characters are UTF-8 encoded
* [-]iuclc
  translate uppercase characters to lowercase
* [-]ixany
  let any character restart output, not only start character
[-]ixoff enable sending of start/stop characters
[-]ixon enable XON/XOFF flow control
[-]parmrk
  mark parity errors (with a 255-0-character sequence)
[-]tandem
  same as [-]ixoff

Output settings:

TagDescription
* bsN backspace delay style, N in [0..1]
* crN carriage return delay style, N in [0..3]
* ffN form feed delay style, N in [0..1]
* nlN newline delay style, N in [0..1]
* [-]ocrnl
  translate carriage return to newline
* [-]ofdel
  use delete characters for fill instead of null characters
* [-]ofill
  use fill (padding) characters instead of timing for delays
* [-]olcuc
  translate lowercase characters to uppercase
* [-]onlcr
  translate newline to carriage return-newline
* [-]onlret
  newline performs a carriage return
* [-]onocr
  do not print carriage returns in the first column
[-]opost postprocess output
* tabN horizontal tab delay style, N in [0..3]
* tabs same as tab0
* -tabs same as tab3
* vtN vertical tab delay style, N in [0..1]

Local settings:

TagDescription
[-]crterase
  echo erase characters as backspace-space-backspace
* crtkill
  kill all line by obeying the echoprt and echoe settings
* -crtkill
  kill all line by obeying the echoctl and echok settings
* [-]ctlecho
  echo control characters in hat notation (‘^c’)
[-]echo echo input characters
* [-]echoctl
  same as [-]ctlecho
[-]echoe same as [-]crterase
[-]echok echo a newline after a kill character
* [-]echoke
  same as [-]crtkill
[-]echonl
  echo newline even if not echoing other characters
* [-]echoprt
  echo erased characters backward, between ‘\’ and ’/’
[-]icanon
  enable erase, kill, werase, and rprnt special characters
[-]iexten
  enable non-POSIX special characters
[-]isig enable interrupt, quit, and suspend special characters
[-]noflsh
  disable flushing after interrupt and quit special characters
* [-]prterase
  same as [-]echoprt
* [-]tostop
  stop background jobs that try to write to the terminal
* [-]xcase
  with icanon, escape with ‘\’ for uppercase characters

Combination settings:

TagDescription
* [-]LCASE
  same as [-]lcase
cbreak same as -icanon
-cbreak same as icanon
cooked same as brkint ignpar istrip icrnl ixon opost isig icanon, eof and eol characters to their default values
-cooked same as raw
crt same as echoe echoctl echoke
dec same as echoe echoctl echoke -ixany intr ^c erase 0177 kill ^u
* [-]decctlq
  same as [-]ixany
ek erase and kill characters to their default values
evenp same as parenb -parodd cs7
-evenp same as -parenb cs8
* [-]lcase
  same as xcase iuclc olcuc
litout same as -parenb -istrip -opost cs8
-litout same as parenb istrip opost cs7
nl same as -icrnl -onlcr
-nl same as icrnl -inlcr -igncr onlcr -ocrnl -onlret
oddp same as parenb parodd cs7
-oddp same as -parenb cs8
[-]parity
  same as [-]evenp
pass8 same as -parenb -istrip cs8
-pass8 same as parenb istrip cs7
raw same as -ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr -icrnl -ixon -ixoff -iuclc -ixany -imaxbel -opost -isig -icanon -xcase min 1 time 0
-raw same as cooked
sane same as cread -ignbrk brkint -inlcr -igncr icrnl -iutf8 -ixoff -iuclc -ixany imaxbel opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0 isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt echoctl echoke, all special characters to their default values.
Handle the tty line connected to standard input. Without arguments, prints baud rate, line discipline, and deviations from stty sane. In settings, CHAR is taken literally, or coded as in ^c, 0x37, 0177 or 127; special values ^- or undef used to disable special characters.

AUTHOR

Written by David MacKenzie.

REPORTING BUGS

Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT

Copyright © 2006 Free Software Foundation, Inc.
This is free software. You may redistribute copies of it under the terms of the GNU General Public License <http://www.gnu.org/licenses/gpl.html>. There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

stty is maintained as a Texinfo manual. If the info and stty programs are properly installed at your site, the command
TagDescription
info stty
should give you access to the complete manual.

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