[sed] sed tip: Remove / Delete All Leading Blank Spaces / Tabs ( whitespace ) From Each Line

[sed]  sed tip: Remove / Delete All Leading/End Blank Spaces / Tabs ( whitespace ) From Each Line

way 1:

sed -e 's/[ \t]*$//' -i  err_msg

way 2:

Find all of the htm file replace it.

find ./ -name '*.htm' -print | xargs sed -i 's/[ \t]*$//'

Where,

• 
  s/ : Substitute command ~ replacement for pattern (^[ \t]*) on each addressed line


• 
  ^[ \t]* : Search pattern ( ^ - start of the line; [ \t]* match one or more blank spaces including tab)


• 
  // : Replace (delete) all matched pattern

sed tip: Remove / Delete All Leading Blank Spaces / Tabs ( whitespace ) From Each Line