CODEWITHSUNDEEP
shell
Alex
Alex

Reputation: 11

How to retain numbers in string in shell?

I'm trying below

a = device.1.2

echo $a should print 1.2

Tried with sed 's/[a-z]//g' a

Upvotes: 1

Views: 95

Answers (1)

RavinderSingh13
RavinderSingh13

Reputation: 133538

First thing first please make sure your shell variable doesn't have space while assigning value to it, so have it like this: a="device.1.2". With your shown samples, could you please try following once.

Have it with parameter substitution way: Where we need not to use an external program to get the value.

echo "${a#*.}"

OR with sed: Since OP was trying sed so adding one sed solution here, this nice command was given by Benjamin see comments for same.

echo "$a" | sed 's/^[^.]*\.//'

Upvotes: 4

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