Sponsored Content
Full Discussion: Help in writing a script
Top Forums Shell Programming and Scripting Help in writing a script Post 302359907 by cfajohnson on Wednesday 7th of October 2009 04:54:24 PM
Old 10-07-2009
Quote:
Originally Posted by scottn
Using "standard" linux "tools"

Code:
echo "Enter a number: "
read NUMBER
seq 0 ${NUMBER:-100} | tac


seq is not standard, though it is common; tac is not standard and is less common than seq.

But you don't need tac if you are using seq:

Code:
seq NUMBER -1 0

The standard way is:

Code:
read n
while [ $n -ge 0 ]
do
  printf "%d\n" "$n"
  n=$(( $n - 1 ))
done

In bash:

Code:
eval "printf '%d\n' {$NUMBER..0}"

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

need help writing a script

Hello everyone. Well, I will get right to the point. I am new to Perl and trying to learn it as much as I can. I have been assigned the task of writing a perl script to extract information from firewall logs. Like I said, I am new to Perl and I am having a tough time because I think what I am... (3 Replies)
Discussion started by: tarballed
3 Replies

2. Shell Programming and Scripting

Writing Script?

Anyone have an example of a simple shell script that solicits a (Y)es or (N)o response from the user. If the response is 'Y' display a message on the screen that thanks the user for the positive response. If the response is 'N' display a message that thanks the user for the negative response. If... (15 Replies)
Discussion started by: wmosley2
15 Replies

3. UNIX for Dummies Questions & Answers

help for writing a script

Hi, I need help writing a unix script to change the time in the server automatically when it reaches a specified time. Only on the 14th of april, when the time becomes midnight (00:00:00), I need the server to change the time automatically to 23:30:00 and start working on as usual with a... (2 Replies)
Discussion started by: amodha
2 Replies

4. Shell Programming and Scripting

help writing script

hi all i am having a file(a fixed length file) of 28 bytes.The file has account number from 5th place to next 16 digits. the file looks like below, 58331600563588885696ACXT5263 58331600563588885697ACXT5263 58331600563588885698ACXT5263 i want to write a script which will extract the... (8 Replies)
Discussion started by: dr46014
8 Replies

5. UNIX for Dummies Questions & Answers

Need help writing this script

Here is the script I am trying to write along with my answer I wrote. Please help me understand why it doesn't work. Create an executable script file called "newname" that will perform the followings: 1. Rename a file upon the user's request. If the file exists, prompt the user for... (1 Reply)
Discussion started by: wiggles
1 Replies

6. Shell Programming and Scripting

Help me in writing the script

Hi, I have written a script which converts a give hexdecimal value to binary value in perl. But now, the problem is I should read every bit of it ( if its 10101010, i should read the value in each position and if the value in that position is 1 i should print a string and should exit if its... (1 Reply)
Discussion started by: prakashreddy
1 Replies

7. Shell Programming and Scripting

Please help me in writing my script

hello all, I have a script, used to search for the strings from the set of 5 similar pattern file from the log dir. So here it goes . The input parameter is a part of the file name. When during the script execution, the script should parse the input parameter to original file's with the same... (0 Replies)
Discussion started by: baraghun
0 Replies

8. Red Hat

writing a script

Dear Madam/Sir Who can help me with writing a script doing the following? 1- Read names of files (only files with special name format let say initially they have the same file name start like TT*) 2- Then create an empty files with the same names have been read in step one but with extension... (1 Reply)
Discussion started by: m.nageeb
1 Replies

9. Shell Programming and Scripting

Help in writing script

i need some help in donig some actions on files in a library. i want to get the n last files, and print to the screen their name, date, and how many times a specific string appears in each file.. how can i do this..?... (6 Replies)
Discussion started by: eee
6 Replies

10. Shell Programming and Scripting

I need help writing this script

:wall: Can't seem to figure out how to fix this please help its not starting over like I would like it to When I enter in "Date" or "Time" nothing comes Also if you can tell me the commands for the other 3 stuff that would be much appreciated #!/bin/bash clear while ; do echo... (8 Replies)
Discussion started by: nowruzr
8 Replies
SEQ(1)							    BSD General Commands Manual 						    SEQ(1)

NAME
seq -- print sequences of numbers SYNOPSIS
seq [-w] [-f format] [-s string] [-t string] [first [incr]] last DESCRIPTION
The seq utility prints a sequence of numbers, one per line (default), from first (default 1), to near last as possible, in increments of incr (default 1). When first is larger than last, the default incr is -1. All numbers are interpreted as floating point. Normally integer values are printed as decimal integers. The seq utility accepts the following options: -f format Use a printf(3) style format to print each number. Only the A, a, E, e, F, f, G, g, and % conversion characters are valid, along with any optional flags and an optional numeric minimum field width or precision. The format can contain character escape sequences in backslash notation as defined in ANSI X3.159-1989 (``ANSI C89''). The default is %g. -s string Use string to separate numbers. The string can contain character escape sequences in backslash notation as defined in ANSI X3.159-1989 (``ANSI C89''). The default is . -t string Use string to terminate sequence of numbers. The string can contain character escape sequences in backslash notation as defined in ANSI X3.159-1989 (``ANSI C89''). This option is useful when the default separator does not contain a . -w Equalize the widths of all numbers by padding with zeros as necessary. This option has no effect with the -f option. If any sequence numbers will be printed in exponential notation, the default conversion is changed to %e. EXIT STATUS
The seq utility exits 0 on success, and >0 if an error occurs. EXAMPLES
# seq 1 3 1 2 3 # seq 3 1 3 2 1 # seq -w 0 .05 .1 0.00 0.05 0.10 SEE ALSO
jot(1), printf(1), printf(3) HISTORY
The seq command first appeared in Plan 9 from Bell Labs. A seq command appeared in NetBSD 3.0, and ported to FreeBSD 9.0. This command was based on the command of the same name in Plan 9 from Bell Labs and the GNU core utilities. The GNU seq command first appeared in the 1.13 shell utilities release. BUGS
The -w option does not handle the transition from pure floating point to exponent representation very well. The seq command is not bug for bug compatible with the Plan 9 from Bell Labs or GNU versions of seq. BSD
September 10, 2013 BSD
All times are GMT -4. The time now is 01:02 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy