How to extract a number from a string using Bash example - Linux Tutorials - Learn Linux Configuration

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Here a listed few of many ways how to extract number from a string. For all the examples below we will use sentence I am 999 years old. where the aim is to exctract nunber 999.

This is a companion discussion topic for the original entry at https://linuxconfig.org/how-to-extract-number-from-a-string-using-bash-example/
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Thank you so much. Helped me a lot