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STTY

Section: User Commands (1)
Updated: September 2017
Index Return to Main 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.

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
--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:

* 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:

[-]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 (or even parity with '-')
* [-]cmspar
use "stick" (mark/space) parity
 

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
* [-]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:

* 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
[-]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 '/'
* [-]extproc
enable "LINEMODE"; useful with high latency links
* [-]flusho
discard output
[-]icanon
enable special characters: erase, kill, werase, rprnt
[-]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 -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 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

GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report stty translation bugs to <http://translationproject.org/team/>  

COPYRIGHT

Copyright © 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.  

SEE ALSO

Full documentation at: <http://www.gnu.org/software/coreutils/stty>
or available locally via: info aq(coreutils) stty invocationaq


 

Index

NAME
SYNOPSIS
DESCRIPTION
Special characters:
Special settings:
Control settings:
Input settings:
Output settings:
Local settings:
Combination settings:
AUTHOR
REPORTING BUGS
COPYRIGHT
SEE ALSO





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