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I have tried that method you proposed ...
but ... you only delete one specific pattern in each iteration and left the others which you will be retained when you delete another pattern.
In the end...

Hi, I used to use sed to delete pattern from file using:

sed '/PATTERN/d' myfile

but how if I have 100 pattern to delete which is listed separated by new line in file called mypattern

sed -e...

The condition guarantee to be satisfied after about 10 loops

I actually want to use those random number on the fly such :
#! /bin/bash
while (condition)
do
number=$RANDOM
do some work here using random number until condition satisfied
done

the...

Thanks, great code !!! but I need some clarifications.

when you compare the generated number to previous one, using :
if (!(numb in prev))
isn't comparing only the last generated random number...

Is anyone know some scripts to generate random number without repetition using bash; for example generate 10 different random numbers.

Thanks

Thanks, it really works. but when I want to put in standard output it takes a very slow processing.

Do u know other way using sed or awk ?
since I want to print other thing after the file name...

Hai I just want to find a file *.txt in particular direcotry and display the file name puls the content. Do someone know hot to do this, thanks.

I try :
find test/ -name '*.txt' | xargs cat
...

Say I have string=test99
I would like to extact the number 99 and put it in different variable using shell script including awk as well.

I know it will be easy in Perl :
$_=test99;
/.*(\d+)/;...