# stty

## 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.
    


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