Exit status of Wget Validation of links inside File

while read file; do
  wget -q "$file"
  if [ $? -ne 0 ]; then
    echo "Link not up"
  else
    echo "OK"
  fi
done < url

VI Editor Quick Reference :

VI Editor Quick Reference :
===================

1) Comment Line from 3 to Line 5

:3,5 s/^/##/g


2) Remove ## from line 3 to Line 5

:3,5 s/##//g


3) To remove sentence from current point

Shift + d (In Escape Mode)


4) To Ignore case in VI editor:

:set ignorecase : you nearly always want this


5) Delete Line 15 till 22

:15,22d

6) Re-edit a messed-up file.

:e!

7) Undo last changes in vi editor

<esc> u or :undo

8) Setting Numbers in Line :

:set nu

9) How to redo something you undid:

:redo

10) Go to start of File :

Shift + (

11) Go to end of File :

Shift + )

12) Go to start of current Line :

0

13) Go to end of Current Line :

$