stty Man page

STTY(1) User Commands STTY(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

-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

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

* [-]drain
wait for transmission before applying settings (on by default)

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:
disable modem control signals

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

same as [-]hup

generate parity bit in output and expect parity bit in input

set odd parity (or even parity with ‘-‘)

* [-]cmspar
use “stick” (mark/space) parity

Input settings:
breaks cause an interrupt signal

translate carriage return to newline

ignore break characters

ignore carriage return

ignore characters with parity errors

* [-]imaxbel
beep and do not flush a full input buffer on a character

translate newline to carriage return

enable input parity checking

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

enable sending of start/stop characters

enable XON/XOFF flow control

mark parity errors (with a 255-0-character sequence)

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 NUL 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

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:
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 input characters

* [-]echoctl
same as [-]ctlecho

same as [-]crterase

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

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

* [-]xcase
with icanon, escape with ‘\’ for uppercase characters

Combination settings:
* [-]LCASE
same as [-]lcase

cbreak same as -icanon

same as icanon

cooked same as brkint ignpar istrip icrnl ixon opost isig icanon, eof
and eol characters to their default values

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

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 -iuclc -ixany
-imaxbel -xcase 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 -iutf8 -iuclc -ixany
imaxbel -xcase -olcuc -ocrnl opost -ofill onlcr -onocr -onlret
nl0 cr0 tab0 bs0 vt0 ff0 isig -tostop -ofdel -echoprt echoctl
echoke -extproc -flusho, all special characters to their default

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 ‘(coreutils) stty invocation’

GNU coreutils 8.25 February 2016 STTY(1)

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