WHy the double square brackets? Post: 302264710

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1. UNIX for Dummies Questions & Answers

square brackets

I would like to substitute a phrase which contains square brackets. change TO how? Thanks

2. UNIX for Dummies Questions & Answers

why put double square brackets in an if clause?

what is the rationale behind putting double square brackets in an if clause? for e.g. if ] || ] || ]; then echo some fields are null fi

3. Shell Programming and Scripting

Use of double square brackets in ksh

Hi First apologies if this has been raised before. I've got the following in a ksh script: if ] For some reason this does not work. But if I remove the double square brackets to: if This works. I thought ksh supported the ]. Or is there more to it? Thanks in advance.

4. Shell Programming and Scripting

Double square brackets question

Hi, I just came across an interesting shell script syntax like the one below: ] && (trap 'rm -rf ${WORK_DIR}/*.$$; echo "\n\nInterrupted !!\n\n"; exit 4' 1 2 3 15) Can someone please explain the code snippet above? The trap command bit is fine but ] && is the hazy part. Generally we use an...

5. UNIX for Dummies Questions & Answers

Test command - Two square brackets

Hello, Can someone please explain to me the following line, ] && break I do not understand why two test square brackets are used. Thanks, Shantanu ---------- Post updated at 03:38 PM ---------- Previous update was at 03:35 PM ---------- And, also why there's a $ before (echo $c |...

6. Shell Programming and Scripting

Replacing text between two square brackets

hi guys, i'm writing a script that looks for a unquie id in a file and replaces a string between two square brackets on the same line as the unquie id: ....... ....... 0001 zz 43242 replace this text] name 0002 sd 65466 UK] country ....... ....... how can i find line with id 0001...

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Delete text between square brackets and also delete those square brackets using sed or awk

Hi All, I have a text file which looks like this: computer programming systems engineering I want to get rid of these square brackets and also the text that is inside these brackets. So that my final text file looks like this: computer programming systems engineering I am using...

8. UNIX for Dummies Questions & Answers

Single or double square brackets

Hi frieds, I don't understand the difference between single square bracket and double square brackets in a IF condition. Ex. if ; then RETURNJOB=1 else RETURNJOB=0 fi It run, but this if ]; then RETURNJOB=1 else RETURNJOB=0 fi

9. Shell Programming and Scripting

Problem with occurence of square brackets

Hello all, I have the following problem: $ cat infile this is spam and i need this too this is spam and i need this too $ perl -nwe '$_ =~ /]+ \]+)\]\]*\]? (\+)$/; print "$1 - $2\n";' infile i need this - too i need this - and i need this too I am not sure how many occurences of...

10. Shell Programming and Scripting

IF statement with square brackets

Hi All, Hope you all are doing good. Yesterday in my project i came across a scenario which i can not guess why it was working in one region and why it was not in another region. Please find my issue below. I am using AIX version 6.0 of UNIX in my project, in shell scripting i have the...

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chdist

CHDIST(1)																 CHDIST(1)

NAME

       chdist - script to easily play with several distributions

SYNOPSIS

       chdist [options] [command] [command parameters]

DESCRIPTION

       chdist is a rewrite of what used to be known as 'MultiDistroTools' (or mdt). Its use is to create 'APT trees' for several distributions,
       making it easy to query the status of packages in other distribution without using chroots, for instance.

OPTIONS

       -h, --help
	   Provide a usage message.

       -d, --data-dir DIR
	   Choose data directory (default: $HOME/.chdist/).

       -a, --arch ARCH
	   Choose architecture (default: `dpkg --print-architecture`).

       --version
	   Display version information.

COMMANDS

       create DIST [URL RELEASE SECTIONS]
	   Prepare a new tree named DIST

       apt-get DIST <update|source|...>
	   Run apt-get inside DIST

       apt-cache DIST <show|showsrc|...>
	   Run apt-cache inside DIST

       apt-rdepends DIST [...]
	   Run apt-rdepends inside DIST

       src2bin DIST SRCPKG
	   List binary packages for SRCPKG in DIST

       bin2src DIST BINPKG
	   List source package for BINPKG in DIST

       compare-packages DIST1 DIST2 [DIST3, ...]
       compare-bin-packages DIST1 DIST2 [DIST3, ...]
	   List versions of packages in several DISTributions

       compare-versions DIST1 DIST2
       compare-bin-versions DIST1 DIST2
	   Same as compare-packages/compare-bin-packages, but also runs dpkg --compare-versions and display where the package is newer.

       compare-src-bin-packages DIST
	   Compare sources and binaries for DIST

       compare-src-bin-versions DIST
	   Same as compare-src-bin-packages, but also run dpkg --compare-versions and display where the package is newer

       grep-dctrl-packages DIST [...]
	   Run grep-dctrl on *_Packages inside DIST

       grep-dctrl-sources DIST [...]
	   Run grep-dctrl on *_Sources inside DIST

       list
	   List available DISTs

COPYRIGHT

       This program is copyright 2007 by Lucas Nussbaum and Luk Claes. This program comes with ABSOLUTELY NO WARRANTY.

       It is licensed under the terms of the GPL, either version 2 of the License, or (at your option) any later version.

Debian Utilities						    2013-12-23								 CHDIST(1)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

square brackets

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2. UNIX for Dummies Questions & Answers

why put double square brackets in an if clause?

Discussion started by: napolayan

3. Shell Programming and Scripting

Use of double square brackets in ksh

Discussion started by: tsu3000

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Double square brackets question

Discussion started by: King Nothing