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.
-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:

* 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:

 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 (even 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
* [-]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
 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 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:

 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 ’/’
 enable erase, kill, werase, and rprnt special characters
 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
* [-]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
 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.


Written by David MacKenzie.


Report stty bugs to GNU coreutils home page: <> General help using GNU software: <>


Copyright © 2009 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.


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 coreutils 'stty invocation'
should give you access to the complete manual.

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