Re: bash: checking if an env var is set? Angel Tsankov wrote: [ follow-up set to

if. Conditionally perform a command. SYNTAX if test-commands ; then

Bash (if..then) error. Hey guys, I was doing some basic bash shell script, as I am

Linuxtopia Books - Advanced Bash Shell Scripting Guide - Operators. . as a test

Jan 20, 1999 . If bash is invoked with the name sh, it tries to mimic the startup behavior of

Sep 16, 2011 . bin/bash if id -u $1 >/dev/null 2>&1; then echo "user exists" else echo "user does

Hi, how can I write this multiple condition in a bash script? Code: if ((a > 30) || ((a

bin/bash if [[ -e source.txt ]] ; then echo 'source.txt exists; copying to destination.txt.

So, if VAR="var with spaces", you do not need to double quote $VAR in a test -

Jul 25, 2011 . As organizers prepare for President Obama's massive fundraiser and birthday

Instructions and examples for writing IF-statements in a Bash shell script.linux.about.com/. /Bash. /How-To-Write-If-Statement-In-A-Bash-Script.htm - CachedBaby Bash :: If Your Nana Get Wet Lyrics - Absolute LyricsIf Your Nana Get Wet - Baby Bash. [Chorus] She's in love with a hustla. She don't

Feb 20, 2007 . Linux tip: Bash test and comparison functions. Demystify test, [, [[, ((, and if-then-

May 30, 2010 . When an interactive shell that is not a login shell is started, bash reads and

I would like to check if a string begins with "node" e.g. "node001". . This snippet

Using this exit code, it's possible to let Bash react on the result of such a test, here

Nov 12, 2007 . bin/bash # Init FILE="/tmp/out.$$" GREP="/bin/grep" #. . # Make sure only root

Aug 27, 2008 . Often when shell scripting with BASH you need to test if a file exists (or doesn't

Bash permits integer operations and comparisons on variables #+ whose value

Jan 18, 2012 . Bash is very flexible, and has many advanced features that you won't see in

Apr 10, 2012 . http://bit.ly/MustacheBashapp To celebrate the release of Mustache Bash, the

Mar 12, 2008 . If you wanted to find out whither a particular file exists you could do the following:

This is an example of a bash script which checks for some running process (

Jun 21, 2010 . Bash conditional statements perform different computations or actions depending

Nov 21, 2006 . You can do boolean OR in BASH by using the -o operator. The following is the

Hi guys I'm having a problem trying to use && clause in the if command. If I use

May 26, 2008 . bin.bash if [[ $# -lt 2 ]]; then echo "Usage: $0 PATTERN STRINGS. " exit 1 fi regex

Jul 27, 2004 . bin/bash variable="This is a fine mess." echo "$variable" # Regex matching with

6.4 Bash Conditional Expressions. Conditional . If the file argument to one of the

If you use bash for scripting you will undoubtedly have to use conditions a lot, for

21 Responses to “Determine if file exists in a Bourne/bash shell script”. October

ok, if the title wasn't descriptive enough, I'll elaborate. I am in need of a kind of if

Feb 3, 2011 . Please find below two UNIX bash scripts to test if the entered input is integer or

You've probably seen this before - even Excel's VBA has if tests! Here's where

Results 1 - 10 of 11 . The content of test.data is -bash-3.2# cat test.data line1 line2 line3 It is important

The following paragraphs describe how bash executes its startup files. If any of

Oct 25, 2011 . If something is unclear to you, you are invited to report this (use

Nov 2, 2011 . Simple Bash if/else statement . However, if you do not find an answer to your

"or" in bash if statements. feel really stoooopid asking this but I've gogled etc to

Our original tutorial needed correcting for the case if $var is null. We have . 17

Mar 5, 2009 . Here is a quick bash tip that might be useful if you need to use inside a bash

I am trying to do a simple condition check, but it doesn't seem to work. . This

Jun 21, 2010 . cat exist.sh #! /bin/bash file=$1 if [ -e $file ] then echo -e "File $file exists" else

Trying to find a better way to check $REMOTE_USER against a list of permiited

Jan 6, 2009 . I really hate from bash novels the abusive use of command listings, you known: a

Sep 21, 2006 . For the bash shell (the default) this is done by two files in your home . Normally

At times you need to specify different courses of action to be taken in a shell script

bash$ PROG="Bash" bash$ echo ${PROG:0} Bash bash$ echo ${PROG:1} ash

Mar 12, 2008 . Explains how to find out if a FILE exists and write permission is granted under

why does: #!/bin/bash wtf=false if [ $wtf ] || [ ! -f filethatexists.whatever ] . The

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