STTY("1") manual page

Table of Contents

## 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.

-a, --all
  print all current settings in human-readable form
-g, --save
  print all current settings in a stty-readable form
-F, --file
  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: * 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:

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:

[-]clocal
  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]
[-]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:

[-]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

* [-]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: * 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:

[-]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: * [-]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 -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.

## Reporting Bugs

Report bugs to <bug-sh-utils@gnu.org>.

## See Also

The full documentation for stty is maintained as a Texinfo manual. If the info and stty programs are properly installed at your site, the command

info stty

should give you access to the complete manual.

## Copyright

Copyright © 1999 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Table of Contents

- Name
- Synopsis
- Description

- Special settings:
- Control settings:
- Input settings:
- Local settings:

- Reporting Bugs
- See Also
- Copyright