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Manual Reference Pages  -  GSTTY (1)


stty - change and print terminal line settings




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


Print or change terminal characteristics.

Mandatory arguments to long options are mandatory for short options too.
-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
  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:

* discard CHAR
  CHAR will toggle discarding of output
* 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
* status CHAR
  CHAR will send an info signal
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:

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
* [-]drain
  wait for transmission before applying settings (on by default)
ispeed N
  set the input speed to 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:

  disable modem control signals
[-]cread allow input to be received
* [-]crtscts
  enable RTS/CTS handshaking
csN set character size to N bits, N in [5..8]
  use two stop bits per character (one with ’-’)
[-]hup send a hangup signal when the last process closes the tty
[-]hupcl same as [-]hup
  generate parity bit in output and expect parity bit in input
  set odd parity (or even parity with ’-’)

    Input settings:

  breaks cause an interrupt signal
[-]icrnl translate carriage return to newline
  ignore break characters
[-]igncr ignore carriage return
  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
  clear high (8th) bit of input characters
* [-]ixany
  let any character restart output, not only start character
[-]ixoff enable sending of start/stop characters
[-]ixon enable XON/XOFF flow control
  mark parity errors (with a 255-0-character sequence)
  same as [-]ixoff

    Output settings:

* [-]ocrnl
  translate carriage return to newline
* [-]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

    Local settings:

  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
  echo newline even if not echoing other characters
* [-]echoprt
  echo erased characters backward, between ’\’ and ’/’
* [-]extproc
  enable "LINEMODE"; useful with high latency links
* [-]flusho
  discard output
  enable special characters: erase, kill, werase, rprnt
  enable non-POSIX special characters
[-]isig enable interrupt, quit, and suspend special characters
  disable flushing after interrupt and quit special characters
* [-]prterase
  same as [-]echoprt
* [-]tostop
  stop background jobs that try to write to the terminal

    Combination settings:

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
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
  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 -icanon -opost -isig -ixany -imaxbel min 1 time 0
-raw same as cooked
sane same as cread -ignbrk brkint -inlcr -igncr icrnl icanon iexten echo echoe echok -echonl -noflsh -ixoff -ixany imaxbel -ocrnl opost onlcr -onocr -onlret tab0 isig -tostop -echoprt echoctl echoke -extproc -flusho, 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.


Written by David MacKenzie.


GNU coreutils online help: <>
Report stty translation bugs to <>


Copyright © 2016 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.


Full documentation at: <>
or available locally via: info \(aq(coreutils) stty invocation\(aq
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GNU coreutils 8.25 STTY (1) January 2016

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