Novell LINUX ENTERPRISE SERVER 11 - ADMINISTRATION Administration Manual

Also see for LINUX ENTERPRISE DESKTOP 11: Installation Manual

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Novell LINUX ENTERPRISE SERVER 11 - ADMINISTRATION Administration Manual Manual pdf 65 page image

which prints:Hello Tux5.7 Working with Common FlowConstructsTo control the flow of your script, a shell has while, if, for and case constructs.5.7.1 The if Control CommandThe if is used to check expressions. For example, the following code tests whetherthe current user is Tux:if test $USER = "tux" thenecho "Hello Tux."elseecho "You are not Tux."fiThe test expression can be as complex or simple as possible. The following expressionchecks if the file foo.txt exists:if test -e /tmp/foo.txtthenecho "Found foo.txt"fiFind more useful expressions at http://www.cyberciti.biz/nixcraft/linux/docs/uniqlinuxfeatures/lsst/ch03sec02.html.5.7.2 Creating Loops With The ForCommandThe for loop allows you to execute commands to a list of entries. For example, thefollowing code prints some information about PNG files in the current directory:for i in *.png; dols -l $idoneBash and Bash Scripts 51