test command

How do I check if a directory exists in a shell script under Linux or Unix like operating systems?

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I am new Unix/Linux user. I am learning shell scripting. How can I compare numbers in bash shell?

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How do I test existence of a text file in bash running under Unix like operating systems?

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Can you explains and provide us “Bourne Shell Exit Status Code” examples?

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I see [ command in /usr/bin directory. What is the /usr/bin/[ command used for?

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Q. How can you test if a file is writable under UNIX / Linux bash shell scripting?

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How do I check if a file called /tmp/foo.txt exists or not using a shell script under Linux operating systems?

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