Updated: 2021/Apr/14


JOT(1)                      General Commands Manual                     JOT(1)

NAME
     jot - print sequential or random data

SYNOPSIS
     jot [-cnr] [-b word] [-p precision] [-s string] [-w word] [reps [begin
         [end [s]]]]

DESCRIPTION
     The jot utility is used to print out increasing, decreasing, random, or
     redundant data (usually numbers) one per line.  The default is to produce
     sequential data.

     The following options are available:

     -b word
             Just print word repetitively.

     -c      This is an abbreviation for -w %c.

     -n      Do not print the final newline normally appended to the output.

     -p precision
             Print only as many digits or characters of the data as indicated
             by the integer precision.  In the absence of -p, the precision is
             the greater of the precisions of begin and end.  The -p option is
             overridden by whatever appears in a printf(3) conversion
             following -w.

     -r      Generate random data.

     -s string
             Print data separated by string.  Normally, newlines separate
             data.

     -w word
             Print word with the generated data appended to it.  Octal,
             hexadecimal, exponential, ASCII, zero padded, and right-adjusted
             representations are possible by using the appropriate printf(3)
             conversion specification inside word, in which case the data are
             inserted rather than appended.

     The last four arguments indicate, respectively, the number of data, the
     lower bound, the upper bound, and the step size or, for random data, the
     seed.  Any argument may be omitted, and will be considered as such if
     given as "-".  Any three of these arguments determines the fourth.  If
     four are specified and the given and computed values of reps conflict,
     the lower value is used.  If fewer than three are specified, defaults are
     assigned left to right, except for s, which assumes its default unless
     both begin and end are given.

     When sequential data are requested the defaults for the four arguments
     are 100 data, a lower bound of 1, an upper bound of 100 and a step size
     of 1.  When random data are requested s defaults to a seed depending upon
     the time of day.  reps is expected to be an unsigned integer, and if
     given as zero is taken to be infinite.  begin and end may be given as
     real numbers or as characters representing the corresponding value in
     ASCII.  The last argument must be a real number.

     Random numbers are obtained through random(3).  The name jot derives in
     part from iota, a function in APL.

EXAMPLES
     The command:
           jot - 42 87 1
     prints the integers from 42 to 87, inclusive.

     The command:
           jot 21 -1 1.00
     prints 21 evenly spaced numbers increasing from -1 to 1.

     The command:
           jot -c 128 0
     prints the ASCII character set.

     The command:
           jot -w xa%c 26 a
     prints the strings "xaa" through "xaz".

     The command:
           jot -r -c 160 a z | rs -g 0 8
     prints 20 random 8-letter strings.

     The command:
           jot -b y 0
     is equivalent to yes(1).

     The command:
           jot -w %ds/old/new/ 30 2 - 5
     prints thirty ed(1) substitution commands applying to lines 2, 7, 12,
     etc.

     The command:
           jot 0 9 - -.5
     prints the stuttering sequence 9, 8, 8, 7, etc.

     The command:
           jot -b x 512 > block
     creates a file containing exactly 1024 bytes.

     The command:
           expand -`jot -s, - 10 132 4`
     sets tabs four spaces apart starting from column 10 and ending in column
     132.

     The command:
           grep `jot -s "" -b . 80`
     prints all lines 80 characters or longer.

SEE ALSO
     ed(1), expand(1), rs(1), seq(1), yes(1), printf(3), random(3)

HISTORY
     The jot utility first appeared in 4.2BSD.

AUTHORS
     John A. Kunze

NetBSD 9.99                     April 25, 2020                     NetBSD 9.99