Extracting String from another string in shell

Question

I have string this:

release/3.0.2.344

And I want to extract this:

release/3.0.2

pattern is like:

release/<number>.<number>.<number>.<number>

pmf · Accepted Answer · 2022-02-22 03:09:44Z

2

Use parameter expansion in bash:

$ v="release/3.0.2.344"

$ echo "${v%.*}"
release/3.0.2

% cuts off of the end of the variable, and the search pattern is a dot . followed by any characters *.

answered Feb 22, 2022 at 3:09

pmf

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1 Comment

David C. Rankin Over a year ago

May be worth mentioning to limit trimming from the right to '.' followed by digits only, you can use ${v%.[[:digit:]]*}. What you have is fine in this case.

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