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'


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