Hi,
I am a beginner at shell scripting, though I have several years of Oracle programming experience. Can anyone recommend a site where I can find some exercises on shell programming. Is there anywhere I can telnet as I dont have UNIX OS on my PC?
Thanks
Rohit (1 Reply)
I have just 3 things that I really need to know the solution, please allow me to show it.
any help would be nice
script that backup a file. The file name to backup should be provided as input parameter, the backup file should have the same file name with the extension ".bak". If the user... (1 Reply)
Hi, all: I have a question about "cleaning up" a huge file with regular expression(s) and sed:
The init file goes like this:
block1,blah-blah-blah-blah,numseries1,numseries2,numseries3,numseries4
block2,blah-blah-blah-blah-blah,numseries,numseries2,numseries3,numseries4
...... (3 Replies)
I did an assignment for sh scripting back in november, and I found it quite fun learning. I would like to retain this knowledge as I'm pretty sure it was my only scripting assignment, from now on in my programming course we won't be doing any scripting apart from the typical makefile scripts. The... (6 Replies)
Hi
I used this command:
mplayer http://host/axis-cgi/mjpg/video.cgi -user root -passwd root \
-cache 1024 -fps 25.0 -nosound -vc ffh264 \
-demuxer 3 -dumpstream -dumpfile output.avi It's ok but...
Video Playing is very fast! Why? Is it a synch problem?
What parameter I have to use for... (1 Reply)
Hi ,
I would like to do some exercises/scripts in order to develop my skills in shell scripts,
can someone pass me some links/suggestions where i can find this?
Thanks a lot :) (3 Replies)
Hello;
I have this rather tricky problem to solve --(to me, anyways) ..
I am processing the following one liner with tcpdump..
tcpdump -i T3501 -A ether host 00:1e:49:29:fc:c9 or ether host 00:1b:2b:86:ec:1b or ether host 00:21:1c:98:a4:08 and net 149.83.6.0/24 | grep --line-buffered -B... (5 Replies)
I want to insert "Text" in each file as a place where I mentioned below "Insert Text Here". These files are something like news of newspaper. Generally, newspaper headlines contain one or two lines.
I don't know how it can be identified whether Text is inserted after first line or second line.
... (10 Replies)
Hello, so I'm taking unix in one of my classes and I've been having fun, but I got stuck at this one question that I'm supposed to know how to answer but I can't wrap my head around it, I figured I'll post it here and see if someone can shed some light into what I'm doing wrong.
Here's the... (1 Reply)
Discussion started by: hiwolf25
1 Replies
LEARN ABOUT NETBSD
jot
JOT(1) BSD 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 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 instead of sequential data, the default.
-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 represen-
tations 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. While at least one of them must appear, any of the other three 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.
Defaults for the four arguments are, respectively, 100, 1, 100, and 1, except that 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)BSD January 5, 2010 BSD