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 1  ~ tldp.org
Introduction to ifAt times you need to specify different courses of action to be taken in a shell script , depending on the success or failure of a command. The if construction allows ...
 2  ~ linuxacademy.com
Conditions in bash scripting ( if statements) | Linux Academy BlogIf you use bash for scripting you will undoubtedly have to use conditions a lot, for example for an if … then construct or a while loop. The syntax ...
 3  ~ thegeekstuff.com
4 Bash If Statement Examples - The Geek Stuff4 Bash If Statement Examples ( If then fi, If then else fi, If elif else fi, Nested if ) ... when I started working on Linux as system administrator, I pretty ...
 4  +1 stackoverflow.com
How do I tell if a file does not exist in bash ? - Stack Overflowbin/ bash FILE=$1 if [ $FILE does not exist ]; then echo "File $FILE does not exist. ..... GNU bash , version 4.2.37(1)-release (i486-pc- linux -gnu).
 5  +3 cyberciti.biz
If ..else..fi - Bash Shell Scripting Directory For Linux / UNIX - nixCraftif ..else..fi allows to make choice based on the success or failure of a command. For example, find out if file exists (true condition) or not (false condition) and take  ...
 6  -2 linuxconfig.org
Bash scripting Tutorial - Linuxconfig .orgHowever, if you do not find an answer to your questions by reading this bash tutorial or you need extra help, feel free to ask us on our new Linux Forum. We will ...
 7  ~ about.com
Bash If Statement (Conditionals) - Linux - About.comInstructions and examples for writing IF -statements in a Bash shell script.
 8  +61 die.net
bash (1): GNU Bourne-Again SHell - Linux man pageIf the -i option is present, the shell is interactive. -l. Make bash act as if it had been invoked as a login shell (see INVOCATION below). -r. If the -r option is present, ...
 9  -3 bash-hackers.org
The classic test command [ Bash Hackers Wiki]Using this exit code, it's possible to let Bash react on the result of such a test, here by using the command in an if -statement: #!/bin/ bash # test if /etc/passwd ...
 10  ~ codewiki.wikidot.com
If / Else Statements (Shell Scripting) - Code WikiShell scripts use fairly standard syntax for if statements. ... bin/ bash if [ "$#" -gt 0 ] then echo "There's Beans" fi if [ "$1" = "cool" ] then echo "Cool ...
 11  +7 shellhacks.com
HowTo : Check If a File Exists | Linux BASH Scripting - ShellHacksWhile creating BASH Scripts, it is commonly helpful to check if a file exists before attempting to perform some action. This is a job for test command (the same as ...
 12  +3 linuxcommand.org
Stay Out Of Trouble - LinuxCommand .orgLearn the Linux command line. ... bin/ bash number=1 if [ $number = "1" ]; then echo "Number equals 1" else echo "Number does not equal 1" fi. When you run ...
 13  -1 steve-parker.org
15) Quick Reference - Unix / Linux Bourne / Bash Shell Scripting Command, Description, Example. &, Run the previous command in the background, ls &. &&, Logical AND, if [ "$foo" -ge "0" ] && [ "$foo" -le "9"]. ||, Logical OR, if  ...
 14  +2 stackexchange.com
bash : test if $WORD is in set - Unix & Linux - Stack ExchangeI am looking for a construct in bash , to decide if a variable $WORD is one of defined words. I need something like this: if "$WORD" in dog cat horse ; then echo ...
 15  +9 wooledge.org
BashGuide - Greg's WikiIt aspires to teach good practice techniques for using BASH , and writing simple ... It will help if you know how to use a text editor; we will not be ...
 16  +7 archlinux.org
Bash - ArchWiki... Bourne shell. Bash can be run on most UNIX-like operating systems, including GNU/ Linux . ... If Bash is spawned by login in a tty, by an SSH daemon, or similar means, it is considered a login shell. This mode can also be ...
 17  +12 superuser.com
bash - Find out if user name exists - Super UserConsider OS X's Directory Services, or Linux with Likewise Active ... bin/ bash if id -u $1 >/dev/null 2>&1; then echo "user exists" else echo "user ...
 18  +14 viewsby.wordpress.com
Bash string ends with | Sany's Linux and Open Source BlogWe can check if a string ends with specific word/string. Lets try to validate with an example. Here I am trying to check if a string ends with def ...
 19  +8 ibm.com
Linux tip: Bash test and comparison functions - IBMThe Bash shell is available on many Linux ® and UNIX® systems today, ... The result is True if the file tested is a file that exists and that has the ...
 20  +13 serverfault.com
linux - Bash script to check if a public HTTPS site is up - Server FaultI'm trying to setup another block of code to a bash script to check if a public website on HTTPS is up or not. Can we do this using CURL?
 21  +4 linuxquestions.org
Bash tips - LQWiki - LinuxQuestions .org WikiAND: if ((a==1 && b==2)). OR: if (( a!=1 || b>10 ))
 22  +8 linux.org
BASH Decision Constructs | Linux .orgLoops are also like decision constructs; loops perform a task if and while the statement is true. The constructs that BASH supports are if , while, ...
 23  -2 gnu.org
Bash Reference Manual: Bash Conditional Expressions - GNUIf the file argument to one of the primaries is of the form /dev/fd/ N , then file descriptor N is checked. If the file argument to one of the primaries is one of /dev/ stdin ...
 24  +15 digitalocean.com
How To Use Bash History Commands and Expansions on a Linux VPSBy default, bash writes its history at the end of each session, overwriting the existing file with an updated version. This means that if you are ...
 25  +76 freeos.com
Linux Shell Scripting Tutorial - A Beginner's handbook - FreeOS.comLinux Command(s) Related with Process; Chapter 3: Shells ( bash ) structured Language Constructs · Decision making in shell script ( i.e. if command)
 26  +9 codecoffee.com
Tips For Linux - A Quick Introduction to Bash Programming - Part 2This time he explains how to perform arithmetic operations in your bash scripts. ... If you do not know what modulus is, it is the value of the remainder when two ...
 27  +9 computerhope.com
Linux and Unix bash command help and examples - Computer HopeHelping you with questions you may have about the Unix and Linux bash command, including ... -l, Make bash act as if it had been invoked as a login shell.
 28  +3 man7.org
bash (1) - Linux manual page - man7.org-i If the -i option is present, the shell is interactive. -l Make bash act as if it had been invoked as a login shell (see INVOCATION below). -r If the -r option is present ...
 29  +71 alvinalexander.com
A Linux Bash if /or example | alvinalexander.comHere's a quick Linux Bash if /else example featuring an or clause: #!/bin/bash day_of_week=`date +"%a"` if [ "$day_of_week" == "Sat" ] ...
 31  -9 tutorialspoint.com
bash - Unix, Linux Command - TutorialspointIf bash is invoked in this fashion, $0 is set to the name of the file, and the positional parameters are set to the remaining arguments. Bash reads and executes ...
 32  +23 linuxfromscratch.org
The Bash Shell Startup Files - Linux From Scratch!The shell program /bin/ bash (hereafter referred to as just "the shell") uses ... If an equivalent file exists in your home directory it may override the ...
 33  +68 faqs.org
BASH Programming - Introduction HOW-TO - FAQs.org6.1 Dry Theory; 6.2 Sample: Basic conditional example if .. then; 6.3 Sample: Basic conditional ...
 34  +41 aplawrence.com
Bash in-process regular expressions - APLawrence.comBash acquired in-process regular expressions in version 3.0, but I never noticed
 35  +12 forbes.com
[Updated] How They Popped The Penguin: One Bash Tactic - ForbesAs a former Linux admin, if someone came and asked to run scripts as root, I would be less than accommodating. Keeping it as simple as ...
 36  +2 linuxsig.org
bash Scripting - Linux SIGThe general Linux philosophy for providing functionality is to link several small, ... This line ensures that even if the user isn't running a bash shell, the script will ...
 37  +50 learncodethehardway.org
Linux Bash Shell Cheat Sheet - Learn Code The Hard WayLinux Bash Shell Cheat Sheet. Basic Commands ... if folder name has spaces use “ “ ... date “+%H” --> If it's 9 am, then it will show 09. -r = delete you crontab.
 38  +43 wikipedia.org
Bash (Unix shell) - Wikipedia, the free encyclopediaIf user-defined functions from the ~/.bashrc are desired in the login shell as well, the ... Some versions of Unix and Linux contain Bash system startup scripts, ...
 39  +62 askapache.com
Crazy POWERFUL Bash Prompt - AskApacheSeveral Cut and Paste ready Bash Prompts for use in .bash_profile, .bashrc, or just ... Home » Linux » Crazy POWERFUL Bash Prompt ... If you just learn this one bit of code, you will gain a lot of shell kung fu, at least I have!
 40  -3 softpanorama.org
Arithmetic Expressions in BASH - SoftpanoramaCompound comparisons, if statements in shell, Macro substitutions caveats .... Another example taken from Bash Shell Programming in Linux
 41  +35 yourownlinux.com
A Tiny Bash Script to Check Whether a Host is ... - Your Own Linux ..!bin/ bash target=$1 count=$( ping -c 1 $target | grep icmp* | wc -l ) if [ $count -eq 0 ] then echo "Host is not Alive! Try again later.." else echo "Yes ...
 42  +16 aboutlinux.info
Bash Shell Scripting - 10 Seconds Guide | All about LinuxThis Bash shell scripting guide is not a detailed study but a quick ... if grep " aboutlinux " thisfile.html then echo "Found the word in the file" else ...
 43  ~ ryanstutorials.netLinux Tutorial - Learn the Bash Command Line - Ryan's Tutorials13 part easy to follow tutorial for the Linux / Unix Bash command line. ... In general I recommend you work through them in order but if you've come here just to ...
 44  ~ linux.com
How to Make a Fancy and Useful Bash Prompt in Linux | Linux .comConvert your humble, boring Bash prompt into a creation of informative ... if running bash if [ -n "$ BASH_VERSION " ]; then # include .bashrc if it ...
 45  -34 unix.com
Bash if statements in one line | Unix Linux Forums | Shell I have the following bash code, and wondering if it is possible (and a good idea) to write the if statements in one line. Code: # Run raytrac on ...
 46  +54 nau.edu
Linux Bash Basics - High Performance Computing - Northern Linux / Bash Basics. What follows is a quick primer on the basics of getting around in Linux with the bash shell. If you require a bit more, please have a look at this ...
 47  +7 jonathanhui.com
Unix / Linux - Bash Scripting | Jonathan HuiUnix/ Linux Bash scripting quick start tutorial with examples. ... echo ${user-$v2} # if user is set, it evaluates to $user else default to $v2 echo ${user-`whoami`} # if  ...
 48  +53 timmurphy.org
Checking for empty string in Bash « timmurphy.orgTags: Bash , coding, dash, empty, language, linux , null, ... In Bash you quite often need to check to see if a variable has been set or has a value ...
 49  +19 linux-magazine.com
OpenSSL with Bash » Linux MagazineIn Bash scripts, it is a good idea to run OpenSSL modules with a specified .... If I don't specify the output with the -out parameter, it is written to standard output.
 50  +12 linuxreviews.org
Bourne Shell Reference ( Linux Reviews)LinuxReviws .org --get your your Linux knowledge ... items in this shell. In most cases the information applies to both the Bourne shell (sh) and the newer bash shell. ... -n s1 Check if s2 has nonzero size. s1 Check if s1 is not the empty string.