CODEWITHSUNDEEP
linuxbashawksedgrep
Alex
Alex

Reputation: 550

Bash script : select lines starting with number in specific range

I have a file containing lines like:

121<some letters> random text ...
1234<some letters> random numbers etc...

Each line starts with a number followed by some letters.I'm looking for a way to select only the lines which start with a number in a specific interval, for example : [0-9999] . I'm having difficulty in selecting these lines if the number of digits can vary.

Tried using grep but can't seem to find the correct way to write the regex.

Upvotes: 1

Views: 4670

Answers (2)

Avinash Raj
Avinash Raj

Reputation: 174696

Through grep,

grep -E '^([1-9][0-9]?[0-9]?[0-9]|[0-9])\b' file

Upvotes: 1

Ed Morton
Ed Morton

Reputation: 203219

awk '($1+0)>10 && ($1+0)<50' file

would print lines that start with a number from 11 to 49 inclusive.

Upvotes: 5

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