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I don't understand this though. How do I search for patterns in a text file and read the whole line in shell script?

Hi,
I'm using bash and brand new to shell script. I would like to do the following.
I have a string which is "UPDATE=1.0". I would like to read the value "1.0" alone in a variable. i.e the things...

Hi folks,
I'm using bash and would like to do the following. I would like to read some values from the file and store it in the variable and use it.

My file is 1.txt and its contents are
...