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| − | This is a tutorial for [[bash]] [[shell]] [[scripting]].
| + | #REDIRECT [[Piping]] |
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| − | = Hello world =
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| − | echo "hello world"
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| − | #!/bin/bash
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| − | echo "hello world"
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| − | | |
| − | = input =
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| − | echo "what is your name? "
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| − | read name
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| − | echo "hello $name"
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| − | Note that the variable is called $name, however the correct statement to read it is
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| − | read name
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| − | It is a common mistake to write
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| − | read $name
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| − | which means "read a string and store it into the variable whose name is stored in $name"
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| − | | |
| − | = conditions =
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| − | echo "what is your name? "
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| − | read name
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| − | if [ $name = "Thorsten" ]; then echo "I know you"
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| − | | |
| − | = line feeds =
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| − | Let's look at the following script:
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| − | read name
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| − | if [ $name = "Thorsten" ]; then echo "I know you"
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| − | Instead of a semicolon you can write a line feed like this:
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| − | read name
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| − | if [ $name = "Thorsten" ]
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| − | then echo "I know you"
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| − | And instead of a line feed you can use a semicolon:
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| − | read name; if [ $name = "Thorsten" ]; then echo "I know you"
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| − | If you want to insert a line feed where you do not need one, e.g. to make the code better readable, you must prepend it with a backslash:
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| − | read \
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| − | name
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| − | if [ $name = "Thorsten" ]
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| − | then \
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| − | echo "I know you"
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| − | = See also =
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| − | * [[bash]]
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| − | * [[shell]]
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| − | * [[scripting]]
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| − | * [[bash operators]]
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| − | * http://en.wikibooks.org/wiki/Bash_Shell_Scripting
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| − | * http://wiki.linuxquestions.org/wiki/Bash_tips
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| − | * http://wiki.linuxquestions.org/wiki/Bash
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Latest revision as of 09:14, 10 January 2013
