Sponsored Content
Full Discussion: Testing for no input.
Top Forums Shell Programming and Scripting Testing for no input. Post 73983 by jhansrod on Tuesday 7th of June 2005 04:21:23 AM
Old 06-07-2005
I have tried this, however it does not seem to work. I have added a line to echo the value of var however it does not default to 3.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to prompt for input & accept input in ONE line

hi, am a new learner to shell programming. i have a script which will prompt for user to key in their name & display their name afterwards. script ===== echo "Pls enter your name:" read name echo "Your name is $name." output ===== Pls enter your name: Bob Your name is Bob. what... (2 Replies)
Discussion started by: newbie168
2 Replies

2. Shell Programming and Scripting

Reading specific contents from 1 input files and appending it to another input file

Hi guys, I am new to AWK and unix scripting. Please see below my problem and let me know if anyone you can help. I have 2 input files (example given below) Input file 2 is a standard file (it will not change) and we have to get the name (second column after comma) from it and append it... (5 Replies)
Discussion started by: sksahu
5 Replies

3. UNIX for Dummies Questions & Answers

Testing for correct user input from keyboard

What script can I use to catch errors in a shell script if user inputs alpha numeric characters instead on integers from the keyboard? (0 Replies)
Discussion started by: Pauline mugisha
0 Replies

4. Shell Programming and Scripting

Input handling and formatting input to shell

i want to get input and depending on it create new commands for input to expect. But problem is that after giving date or month as 01-09 it is interpretation as 1-9 echo -n "ENTER DATE " read d1 echo -n "ENTER MONTH " read m1 echo -n "ENTER YEAR" read y1 o=1 i=1 d2=`expr $d1... (1 Reply)
Discussion started by: sagar_1986
1 Replies

5. Shell Programming and Scripting

Script to delete files with an input for directories and an input for path/file

Hello, I'm trying to figure out how best to approach this script, and I have very little experience, so I could use all the help I can get. :wall: I regularly need to delete files from many directories. A file with the same name may exist any number of times in different subdirectories.... (3 Replies)
Discussion started by: *ShadowCat*
3 Replies

6. Shell Programming and Scripting

function terminating if i give input as space or no input and enter

HI i have written a script to ask input from the user. this script should promote the user for y/n input. if user enters anyother input then y/n the script promotes him again. this below code is working fine for all the cases. except for space and enter " if i give space and enter it is... (2 Replies)
Discussion started by: BHASKARREDDY006
2 Replies

7. Shell Programming and Scripting

[Solved] Testing Data Type of User Input

hi all i'm new in shell scripting and now i'm working on project and i wanna make a function take input from user and test it's datatype then if correct write it to file i wounder what is the best way to do this ? can i use awk ? edit by bakunin: Please give your threads a meaningful... (5 Replies)
Discussion started by: mohamed91
5 Replies

8. Shell Programming and Scripting

Read input files and merge them in given order and write them to input one param or one file

Dear Friends, I am looking for a shell script to merge input files into one file .. here is my idea: 1st paramter would be outfile file (all input files content) read all input files and merge them to input param 1 ex: if I pass 6 file names to the script then 1st file name as output file... (4 Replies)
Discussion started by: hyd1234
4 Replies

9. Homework & Coursework Questions

Removing punctuations from file input or standard input

Just started learning Unix and received my first assignment recently. We haven't learned many commands and honestly, I'm stumped. I'd like to receive assistance/guidance/hints. 1. The problem statement, all variables and given/known data: How do I write a shell script that takes in a file or... (4 Replies)
Discussion started by: fozilla
4 Replies

10. Shell Programming and Scripting

User input and run awk using the input

I am trying to allow a user to enter in text and then store that text in a variable $gene to run in an awk command in which those values are used to run some calculations. I am getting syntax errors however, when I try. Thank you :). The awk runs great if it is a pre-defined file that is used,... (7 Replies)
Discussion started by: cmccabe
7 Replies
CUT(1)									FSF								    CUT(1)

NAME
cut - remove sections from each line of files SYNOPSIS
cut [OPTION]... [FILE]... DESCRIPTION
Print selected parts of lines from each FILE to standard output. Mandatory arguments to long options are mandatory for short options too. -b, --bytes=LIST output only these bytes -c, --characters=LIST output only these characters -d, --delimiter=DELIM use DELIM instead of TAB for field delimiter -f, --fields=LIST output only these fields; also print any line that contains no delimiter character, unless the -s option is specified -n with -b: don't split multibyte characters -s, --only-delimited do not print lines not containing delimiters --output-delimiter=STRING use STRING as the output delimiter the default is to use the input delimiter --help display this help and exit --version output version information and exit Use one, and only one of -b, -c or -f. Each LIST is made up of one range, or many ranges separated by commas. Each range is one of: N N'th byte, character or field, counted from 1 N- from N'th byte, character or field, to end of line N-M from N'th to M'th (included) byte, character or field -M from first to M'th (included) byte, character or field With no FILE, or when FILE is -, read standard input. AUTHOR
Written by David Ihnat, David MacKenzie, and Jim Meyering. REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>. COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. SEE ALSO
The full documentation for cut is maintained as a Texinfo manual. If the info and cut programs are properly installed at your site, the command info cut should give you access to the complete manual. cut (coreutils) 4.5.3 February 2003 CUT(1)
All times are GMT -4. The time now is 03:23 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy