Condition in bash script Post: 303038797

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Bash: if condition as variable

How can I use a variable that has the conditions for the if statement stored in it? my test script condition=" || || " if "$condition" then echo "true" else echo "false" fi output $ ./test2.sh ./test2.sh: line 3: || || : command not found false

2. Shell Programming and Scripting

Multiple condition checking in bash

Hi All, I am trying to check if two variables have value assigned to it. i am doing it like if ] then echo "Please specify either single hostname or host file for the report" usage exit fi But its not working for it.Even i specify values for both variables it dont go...

3. Programming

if condition in bash

Hi, I have meaning to include an if condition statement in my code to check the directory for existing output files and if its existing i want the program to delete it before doing the succeeding command. i just dont know the correct syntax for it. thanks much guys, this forum has indeed been very...

4. Red Hat

how to use if condition with sed command in BASH

Urgent help with bash scripting 1- i am using grep to find a string called: tinker panic 0 in a file /etc/ntp.conf if the string is not there, i want to add the strings in /etc/ntp.conf file in the first line of the file. if not do nothing or exit. 2- also i want to add # in front of the...

5. UNIX for Dummies Questions & Answers

Bash condition test at the end of string

I want to check (using bash condition test function) if string contains three spaces, ignoring last three spaces at the end of string. string_to_report='foo bar foo bar ' string_to_ignore='foo bar '

6. Shell Programming and Scripting

Add another condition to bash for when not met

In the below I can not seem to add a line that will add Not low if the statement in bold is not true or meet. I guess when the first if statement is true/meet then print low, otherwise print Not low in $(NF + 1). I am not sure how to correctly add this. Thank you :). if(low <= $2 && $2 <=...

7. Shell Programming and Scripting

Bash script if condition not executing

issue is with .txt files

8. Shell Programming and Scripting

Need Multiple checks inside if condition in a bash shell script

Hi, I need to perform the untar and rm operation if the file found is a .tar and does not have test.tar or hello.tar as the file names. Below is the loop to check the same. for tf in *.tar do if ] then found=1 ...

9. Shell Programming and Scripting

Creating a condition on a bash script

I wrote a code to find codons in a DNA string. The only problem I have is how do I make the code only work for a file with DNA. This means the file only has the characters a,c,g,t and no white space characters.

10. UNIX for Beginners Questions & Answers

Awk/bash one liner replacement for a if condition

Hi. I wrote this small bash script, i want to compare second column from file1 with file2 if a pattern matches. Files are small and I am sure that pattern occurs only once. I think this can be rewritten into a awk one liner. Appreciate if someone could give me idea. Whole NR FNR confuse me :o ...

LEARN ABOUT DEBIAN

thread::pool::simple

Simple(3pm)						User Contributed Perl Documentation					       Simple(3pm)

NAME

       Thread::Pool::Simple - A simple thread-pool implementation

SYNOPSIS

	 use Thread::Pool::Simple;

	 my $pool = Thread::Pool::Simple->new(
			min => 3,	    # at least 3 workers
			max => 5,	    # at most 5 workers
			load => 10,	    # increase worker if on average every worker has 10 jobs waiting
			init => [&init_handle, $arg1, $arg2, ...]   # run before creating worker thread
			pre => [&pre_handle, $arg1, $arg2, ...]   # run after creating worker thread
			do => [&do_handle, $arg1, $arg2, ...]	   # job handler for each worker
			post => [&post_handle, $arg1, $arg2, ...] # run before worker threads end
			passid => 1,	    # whether to pass the job id as the first argument to the &do_handle
			lifespan => 10000,  # total jobs handled by each worker
		      );

	 my ($id1) = $pool->add(@arg1); # call in list context
	 my $id2 = $pool->add(@arg2);	# call in scalar conetxt
	 $pool->add(@arg3)		# call in void context

	 my @ret = $pool->remove($id1); # get result (block)
	 my $ret = $pool->remove_nb($id2); # get result (no block)

	 $pool->cancel($id1);		# cancel the job
	 $pool->cancel_all();		# cancel all jobs

	 $pool->join(); 		# wait till all jobs are done
	 $pool->detach();		# don't wait.

DESCRIPTION

       "Thread::Pool::Simple" provides a simple thread-pool implementaion without external dependencies outside core modules.

       Jobs can be submitted to and handled by multi-threaded `workers' managed by the pool.

AUTHOR

       Jianyuan Wu, <jwu@cpan.org>

COPYRIGHT AND LICENSE

       Copyright 2007 by Jianyuan Wu

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.10.1							    2010-10-04							       Simple(3pm)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Bash: if condition as variable

Discussion started by: curlee2002

2. Shell Programming and Scripting

Multiple condition checking in bash

Discussion started by: kailash19

3. Programming

if condition in bash

Discussion started by: ida1215

4. Red Hat

how to use if condition with sed command in BASH

Discussion started by: lamoul