Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Use grep result to execute next command
Top Forums Shell Programming and Scripting Use grep result to execute next command Post 302288228 by cfajohnson on Monday 16th of February 2009 06:33:41 PM
Old 02-16-2009
Quote:
Originally Posted by iririr
So far I have

Code:
      5 
      6 
      7 while [ 1 ]


The standard idiom is:

Code:
while :

Or:

Code:
while true

Quote:
Code:
      8 do
      9 
     10    myvar= fgrep -c 'Started in' jboss_log.txt


Syntax error. There can be no space after the equals sign.
Quote:
Code:
     11 
     12    echo $myvar
     13 
     14   if [ $myvar==1 ]


That will always be true as you are testing a non-empty string. There is no test operator in that statement.

And the test for numerical equality is -eq:

Code:
if [ $myvar -eq 1 ]

Quote:
Code:
     15   then
     16       echo "JBoss was launched successfully"
     17         break
     18       fi
     19       sleep 1
     20     done

But the if statement is always true even thou line 12 prints 0.
Can anyone tell me why?
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

assign subst|grep|sed command result to a variable

Hi, I'm quite new to scripting and I want to modify following line of an existing script: MYVAR=`subst |grep 'L:\\\:' | sed -e 's/.*\\\//'`; What I have to do is to use the content of a variable instead of the constant expression 'L:\\\:' as the grep string to be matched. Assuming I already... (5 Replies)
Discussion started by: snowbiker99
5 Replies

2. Shell Programming and Scripting

Get execute result of su

I wrote a shell script. su user << EOF some commands result=$? EOF echo $result Other program determined by $result It outputs nothing. How to pass the variable 'result' "inside su" to "outside su"? (5 Replies)
Discussion started by: uativan
5 Replies

3. UNIX for Dummies Questions & Answers

Execute grep command within a folder

Experts, i need your help to made an enhance query using the existing one. i'm using a command "find . -exec grep -l 'search string' {} \;" to search a particular sting within the file within a folder. Basically, my idea is to fine tune my search. What i want is, instead of searching all files... (2 Replies)
Discussion started by: gav_dhiman
2 Replies

4. Shell Programming and Scripting

If the grep command returns any result set

my intension is to use a grep command inside the shell script and if any row is returned or not.. depending on the resultset i have to code on further. how to check this i mean.. could anyone help me out with the if condition how to use it here !! (4 Replies)
Discussion started by: gotam
4 Replies

5. UNIX for Dummies Questions & Answers

Bash - CLI - grep - Passing result to grep through pipe

Hello. I want to get all modules which are loaded and which name are exactly 2 characters long and not more than 2 characters and begin with "nv" lsmod | (e)grep '^nv???????????? I want to get all modules which are loaded and which name begin with "nv" and are 2 to 7 characters long ... (1 Reply)
Discussion started by: jcdole
1 Replies

6. Shell Programming and Scripting

Different cmd to execute and based on some pattern parse it and then store result in xlx format

Hi I have a different requirement, I need to run some application on my device from a file app_name.txt one by one which is like this: /usr/apps/email /usr/apps/message /usr/apps/settings after each app while it is running I need to execute again one cmd like ps -ef |grep... (2 Replies)
Discussion started by: Sanjeev Roy
2 Replies

7. Shell Programming and Scripting

Grep result from dd command

Hi, I am running following command in a bash script for testing IO and use grep to get throughput number, but it did not work, it displayed everything: dd if=/dev/zero of=/dev/null bs=1G count=1 oflag=dsync | grep bytes | awk '{print $7}' 1+0 records in 1+0 records out 536870912 bytes... (2 Replies)
Discussion started by: hce
2 Replies

8. Shell Programming and Scripting

Grep command giving different result for different users for same command

Hello, I am running below command as root user #nodetool cfstats tests | grep "Memtable switch count" Memtable switch count: 12 Where as when I try to run same command as another user it gives different result. #su -l zabbix -s /bin/bash -c "nodetool cfstats tests | grep "Memtable switch... (10 Replies)
Discussion started by: Pushpraj
10 Replies

9. Shell Programming and Scripting

Execute command and show result in web page

Hi everyone, I have two question 1- I want to execute command in shell and after execution result show in a web server. (kind of making UI ) e.g. in shell root ~: show list item1 item2 item(n)in web server in a page draw a table and show those items in itno | name... (1 Reply)
Discussion started by: indeed_1
1 Replies

10. UNIX for Beginners Questions & Answers

Search a multi-line shell command output and execute logic based on result

The following is a multi-line shell command example: $cargo build Compiling prawn v0.1.0 (/Users/ag/rust/prawn) error: failed to resolve: could not find `setup_panix` in `human_panic` --> src/main.rs:14:22 | 14 | human_panic::setup_panix!(); | ... (2 Replies)
Discussion started by: yogi
2 Replies
All times are GMT -4. The time now is 12:27 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy