1. UNIX for Dummies Questions & Answers

Hello! I want to evaluate some mathematical expressions in a script and I try to use 'expr' command. Unfortunatally, when I have, for example, expr 8.2 + 6 the result is 'expr: non-numeric argument' Why ? I work on SunOs 5.7. Thanks in advance Nathe (5 Replies)

2. UNIX for Dummies Questions & Answers

I am running the following Y=05 Y=`expr $X - 1` and I getting a result of 4. Does anyone know if there is a way to make the result 04 instead of 4? (3 Replies)

3. Red Hat

i am new to shell programming, currently using redhat linux of version 2.4.20-8. i have problem in executing expr command in the following shell script $ x=5 $ x='expr $x + 1' $ echo $x the output is displaying always expr $x + 1 Pls guide me for the above query (3 Replies)

4. Shell Programming and Scripting

What is the difference between test expr VS . For example : if test 5 -eq 6 echo "Wrong" and if echo "Wrong" bot will give the same output as Wrong. Now, what is the difference between these two? though they are producing the same result why we need two? Any answer will be... (2 Replies)

5. Shell Programming and Scripting

$ cat > mtable #!/bin/sh # #Script to test for loop # # if then echo "Error - Number missing form command line argument" echo "Syntax : $0 number" echo "Use to print multiplication table for given number" exit 1 fi n=$1 for i in 1 2 3 4 5 6 7 8 9 10 do echo "$n * $i = `expr $i \*... (1 Reply)

6. UNIX for Dummies Questions & Answers

Hey there i want to subtract the content from $b from $a. Each variable has got 18 values (normal numbers from 0 - 99). How can i subtract them? I know i have to use the expr command, this is what i have till now: a=`cat Tabelle.dat | awk {'print $4'} | awk -F: {'print $1'}` b=`cat... (1 Reply)

7. UNIX for Dummies Questions & Answers

i have been told that 'let' is faster than 'expr' in terms of performance. Is this correct? if yes, why is it so? i am not able to see any performance difference in small arithmetic operations. Thanks (3 Replies)

8. Shell Programming and Scripting

Hi All, I'm writing a shell script in KSH, where I want to store the filename, total record count and actual record count of all the source files. The source files reside in 4 different sub-folders under the same root folder. Below is code: #!/usr/bin/ksh... (6 Replies)

9. Shell Programming and Scripting

Hi I have bellow script: t1=`cat node1.txt | grep thread1 | cut -f2 -d '-'` t2=`cat node2.txt | grep thread2 | cut -f2 -d '-'` t3=`cat node1_rcat.txt | grep thread1 | cut -f2 -d '-'` t4=`cat node2_rcat.txt | grep thread2 | cut -f2 -d '-'` if ]; then echo "no restore" >> log.log... (6 Replies)

10. Shell Programming and Scripting

HI there I am trying to understand Shell scripting to create my own, I am attempting a few examples can anyone tell me what this means?n=$( expr $n + 1)Tried looking on the internet, but just cannot find its anywhere :( .Help please (4 Replies)