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How do I use shell variables in an awk script?
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Shell, Concatenating 2 strings to reference a 3rd variable
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How to export variables from a file?
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Reading a specific line from a text file in Java
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Read Numeric Data from a Text File in C++
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How do I set a variable to the output of a command in Bash?
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How to print only defined variables (shell and/or environment variables) in bash
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What's an easy way to read random line from a file in Unix command line?
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Pass shell variable as a /pattern/ to awk
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Parsing variables from config file in Bash
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How do I assign the output of a command to a variable?
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Replace a string in a text file using a shell script not working properly
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Shell variables in sed script
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Extract two values from the output of a command