Remove first character of a string in Bash

Question

I need to calculate md5sum of one string (pathfile) per line in my ls dump, directory_listing_file:

./r/g4/f1.JPG ./r/g4/f2.JPG ./r/g4/f3.JPG ./r/g4/f4.JPG 

But that md5sum should be calculated without the initial dot. I've written a simple script:

while read line do     echo $line | exec 'md5sum' done  ./g.sh < directory_listnitg.txt 

How do I remove the first dot from each line?

Answer 1

myString="${myString:1}" 

Starting at character number 1 of myString (character 0 being the left-most character) return the remainder of the string. The "s allow for spaces in the string. For more information on that aspect look at $IFS.

Answer 2

You can pipe it to

cut -c2- 

Which gives you

while read line do echo $line | cut -c2- | md5sum done  ./g.sh < directory_listnitg.txt