shell scripting

How do I install the Z shell ( zsh ) shell under FreeBSD 9 operating systems?

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How do I assign the output of a shell command to a shell variable under Unix like operating system? For example, I want to store the date command output to a variable called $now. How do you do that?

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How do I run a Linux shell script? How can I run a script in Linux operating system using command line options?

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I need to call the function called foo() using echo command in the same statement. How do I all or invoke the function using the echo statement?

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How do I join two strings under BASH? I have two strings stored in two different variables (_p=/delta and _u=aqua) and how do I join this and assign it to another variable in bash?

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How do delete multiple files in bulk (say all *.bak file stored in /netapp/ and its subdirectory) under Linux / UNIX operating systems?

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What is the use of UNIX source command under bash or any other shell? How do I use source command under UNIX / OS X / Linux operating systems?

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