Sponsored Content
Top Forums Shell Programming and Scripting Increment a variable in unix bash Post 302629165 by amrutha0303 on Tuesday 24th of April 2012 11:28:41 AM
Old 04-24-2012
Hello there,

Thanks both for the quick reply. I tried using (( C +=1 )) and it kept throwing a syntax error at me. I was just not sure why.

I am curious though. Functions like
Code:
$(( ls - l ))

as well doesnt work for me. It keep throwing the syntax error saying `(' unexpected whenever i use something like that.

Help is appreciated.

Thanks.
-A
 

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

increment a Variable

hi, i want to increment a Variable but it doesnt work. here my codé COUNT=1 COUNT= 'expr $COUNT + 1' i've tried it in the prompt but it print me: expr: syntaxerror What does I make wrong? (4 Replies)
Discussion started by: cengiz
4 Replies

2. Shell Programming and Scripting

Increment of a variable

Hi All, I have a variable n that stores a number. Eg. echo $n comes out to be 120. I need to print 121 using echo command on n. Please advice. Thanks in advance !! (4 Replies)
Discussion started by: learning_skills
4 Replies

3. UNIX for Dummies Questions & Answers

bash script to increment a digit in filename

Hi guys, Can someone help me out with this: I have a directory with files like the following, GHost++ 2010-03-14 04-01 DotaCash RD us_ca LC #7 (44m19s).w3g GHost++ 2010-03-14 04-06 DotaCash AP us_ca LC #8 (42m24s).w3g GHost++ 2010-03-14 04-07 DotaCash AR us_ca LC #10 (08m23s).w3g ... (4 Replies)
Discussion started by: hbjlee17
4 Replies

4. Shell Programming and Scripting

Variable increment (of some sort)

i have a variable that has more than one value. i am declaring another variable, which will have the old variable data one by one. i want to use the second variable to hold the track of all the variable it has parsed from the first one. can somebody help me how do i declare and use the second... (7 Replies)
Discussion started by: gopajitmalakar
7 Replies

5. Shell Programming and Scripting

Bash 4.0 increment variable

Hi there everyone! This is my first post so be gentle. I have a small bash script that is extracting 3 line every 3 lines. I got the AWK part but i cant do the loop part. #!/bin/bash export line=`awk 'END { print NR }' btnew` echo $line for i in {1..$line..3} #increment do echo... (2 Replies)
Discussion started by: theodorosGreece
2 Replies

6. Shell Programming and Scripting

How to increment a string variable?

Hi All, I am new to this forum and a novice at shell script. I am trying to write a script to determine each of the NIC configured on a linux system and its speed and Duplex. I came up with the following piece of code: echo `ifconfig -a | grep eth > /home/a/nic.txt` i=`awk -F, '{print... (4 Replies)
Discussion started by: pravin883
4 Replies

7. Shell Programming and Scripting

[Solved] How to increment and add variable length numbers to a variable in a loop?

Hi All, I have a file which has hundred of records with fixed number of fields. In each record there is set of 8 characters which represent the duration of that activity. I want to sum up the duration present in all the records for a report. The problem is the duration changes per record so I... (5 Replies)
Discussion started by: danish0909
5 Replies

8. Shell Programming and Scripting

Bash counter increment not working

Hi all, I'm using Bash 4.3.8 on an Ubuntu system, and no matter what I try, incrementing a counter won't work. The simplest example would be something like this: #!/bin/bash myVar=0 myVar=$((myVar++)) echo myVar The variable should be 1, but it's always 0. I've tried every increment... (6 Replies)
Discussion started by: Zel2008
6 Replies

9. Shell Programming and Scripting

Increment date variable

hey guys, I need to incerement the date variable for instance echo `date '+%F %H:%M:00'` this produces 2014-08-02 20:05:00 -I will grant this to : $Datehour and need to assign 1 hr from now to $Datelasthour -the script time will be used to talk to DB system information. however... (4 Replies)
Discussion started by: mo_VERTICASQL
4 Replies
ERROR::PASS1(7stap)													       ERROR::PASS1(7stap)

NAME
error::pass1 - systemtap pass-1 errors DESCRIPTION
Errors that occur during pass 1 (parsing) usually mean a basic syntax error of some sort occurred in the systemtap script. There are sev- eral classes of problems possible: plain syntax error The systemtap script parser detects a large variety of errors, such as missing operands, bad punctuation. It tries to list what kinds of tokens it was expecting to see, and will show the region of the source code with the problem. Please review the stap(1) man page and/or the tutorial, to correct the script's syntax. grammar ambiguities There is at least one known ambiguity in the systemtap grammar. It relates to the optionality of ; (semicolon) separators between statements, and the ++ and -- increment/decrement operators. If the parser indicates an error, consider adding some explicit ; sep- arators between nearby statements and try again. missing command line arguments A systemtap script that uses the $N and @N constructs for substituting in command-line options may fail if not enough options were given on the stap command line. compatibility changes Some versions of systemtap have changed the language incompatibly, for example by adding the try/catch keywords for exception han- dling. In such cases, rerun systemtap with the --compatibility=VERSION option, substituting the last systemtap version where your script was known to work. You may also check the release-history NEWS file for compatibility changes. GATHERING MORE INFORMATION
Increasing the verbosity of pass-1 with an option such as --vp 1 can help pinpoint the problem. SEE ALSO
stap(1), error::reporting(7stap) ERROR::PASS1(7stap)
All times are GMT -4. The time now is 07:21 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy