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This is the code:

while test 1 -eq 1
do
read a
$a
if test $a = stop
then
break
fi
done

I read a command on every loop an execute it.
I check if the string equals the word stop to...

Thank you all,but I don't understand 'NR=='

Should I put there $3(the argument I want to compare every line)?

awk '$3=='$i temp.txt
awk '$3'$i temp.txt
Both doesn't work.

Is there a way to grep only one line from a file listing name of files?
If I use head -1 it's ok(the first line only)
If I use head -2 it's not good because I have already checked the first line.
...

My script(3 arguments $1 = folder,$2 extension,$3 string) should do the following things:
-Enter in the folder of $1(if exists).
-Put ls *.$2 > temp.txt ( I use a temp file to store the result of...

I donwloaded notepad and save the .txt file in unix format instead of pc format and now it works.

Yes you are right,but it doesn't work anyway.
Maybe I should save in linux format?

I'm using cygwin to make some scripts,but I have the following problem.
If I create a simple script like this one:

if [ $# -ne 2 ]
echo "Error"
exit 1
fi
echo "`expr $1 + $2`"

I obtain...

What does awk actually do?
I read that combines grep and sed commands but I don't understand this '$1=" "'.
It works only if I don't create a script.
What should I do to make a working script of...

Thank you.
But I don't know how write the command.
grep "ls" history doesn't work.

I'd like to create a script that keeps track of the commands used.
For example:

count ls ps

and from now on whenever I use ls or ps a counter is increased.
I want that after the command...