How to check if a Bash variable is empty

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if [ -z "$VARIABLE" ]

If $VARIABLE is not set or empty the if statement above will return true, the -z option tests for a zero-length string, so whether $VARIABLE is not set or empty the ifstatement will return true

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Ian Carnaghan

I am a software developer and online educator who likes to keep up with all the latest in technology. I also manage cloud infrastructure, continuous monitoring, DevOps processes, security, and continuous integration and deployment.

About Author

Ian Carnaghan

I am a software developer and online educator who likes to keep up with all the latest in technology. I also manage cloud infrastructure, continuous monitoring, DevOps processes, security, and continuous integration and deployment.

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