I have this file named korad and I need to print all lines of this file that start with "d" and end with number, This is what I tried:

grep "^d*[0-9]$" korad

CodePudding user response：

grep -E '^d(?:.*)\d$' korad

To get all lines starting with d and ending with a digit

Regex101 Demo

CodePudding user response：

What about this:

grep "^d" korad | grep "[0-9]$"

This first filters the lines, starting with letter "d" and afterwards filters those results with the lines, ending with a number. Like that, you don't need to worry about anything being present between the first and the last character.

In case you don't understand the vertical bar, it's called a pipe, which is (amongst others) explained here.

CodePudding user response：

Suggesting:

 grep "^d.*[[:digit:]]$" korad