Writing shell scripts - Lesson 9: Flow Control - Part 1 First form if condition ; then commands fi # Second form if condition ; then commands else commands fi ...
test (Unix) - Wikipedia, the free encyclopedia test is a command-line utility found in Unix-like operating systems that evaluates conditional expressions. ... If the file specified by the first positional parameter to the shell procedure, $1, does not exist or ...
Linux Script Test Conditions There is a function provided by bash called test which returns a true or false value depending on the result of the tested expression.
Conditions in bash scripting (if statements) | Linux Academy Blog 25 Nov 2012 ... A small amount of general shell knowledge is assumed. ... A short explanation of the example: first we check if the file somefile is readable (“if ...
Introduction to if The TEST-COMMAND list is executed, and if its return status is zero, the ... More information about this subject can be found in the Bash documentation. ... valid UNIX command, any executable program, any executable shell script or any shell ...
Beyond Your First Shell Script | Linux Journal As your shell scripts get more complex, you'll need to put a directive at the beginning to tell the operating system what sort of shell script this is. You found yourself repeating the same few commands over and over: print out your weekly report, mail a
Using Bash shell scripts for function testing Function testing is a critical part of software development -- and Bash, which is already loaded in Linux and ready to go, can help you do it quickly and easily. In this article, Angel Rivera explains how to use Bash shell scripts to perform function test
Example of a simple shell script - Seton Hall University Pirate Server Bourne Shell Programming Overview These are the contents of a shell script called display: cat display # This script displays the date, time, username and # current directory. echo "Date and time is:" date echo echo "Your username is: `whoami` \\n
Shell Script Help - www.bigcalm.org if [ ! condition ] If condition is not true if [ -f $FILENAME ] If file exists called $FILENAME if [ -d $DIRNAME ] If directory exists called $DIRNAME if [ -x $FILENAME ] if file $FILENAME is executable if [ -w $FILENAME ] if file $FILENAME is writable if
Unix/Linux shell script reference page | alvinalexander.com Linux shell script math/number equality tests Here's how you perform math/number/arithmetic tests using the Bourne and Bash shells: n1 -eq n2 Test if n1 equals n2 n1 -ne n2 Test if n1 is not equal to n2 n1 -lt n2 Test if n1 is less than n2 n1 -le n2 Test
