Split a string in shell to get all fields upto final '.' (Bash)

Question

I\'m looking to get 1.2.3.4 of string 1.2.3.4.5 I know that I can use this code to get the final number, but what can I use to get all numbers previous. (Including \':\')

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Answer 1

Try using:

echo ${foo%.*}

Yielding:

foo="1.2.3.4.5"
echo ${foo%.*}
1.2.3.4

and

foo="1 2 6"
echo ${foo%.*}

yields

1 2 6

If you want to convert the spaces to ., you can use tr:

echo $foo | tr ' ' '.'

Yielding the following for foo="1 2 6"

1.2.6