Shell Programming and Scripting

Dear Rudic,
Many thanks but it gives in reverse order. Maybe there could be another option to list in reverse with one liner.

Expected order:

Code:

Eliot
Borges
Aragon

Your output:

Code:

Aragon
Borges
Eliot

Thanks for You All

Kind regards
Boris

It's the order of your file2. Howsoever, try

Code:

grep -B1 -ffile1 file2 | tac
T S Eliot
+440011223344
J L Borges
+330022110033
--
L Aragon
+2828288889999

Thanks Rudic,
tac and cat gives different order. Interesting command



Many thanks
Boris

Getting no output just means that your pattern doesn't match the content of any line in fileB, or that count is greater than 6. You did not write how you set the variables COL1, COL2 etc. The easiest way to do this is to turn on tracing using

Code:

set -x

. My guess is that fileB simply doesn't have any line matching the pattern.

Another point - which is just a matter of style: You don't need deeply nested if here. instead of

Code:

if CONDITION1; then
  foo
else
  if CONDITION2; then
    bar
  fi
fi

it is much more readable to write

Code:

if CONDITION1; then
  foo
elif CONDITION2; then
  bar
fi