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Thank you very much both of you for the help!

I want to display the login and the name of the user with UID from 10-15.
I put this code but i can't see any result!
cat /etc/passwd|awk '{if($3>=10 && $3<=15) {print $1,$6}}'

As far as i know he will teach us the awk command on the next lesson!I may not know how to use the awk but as i see now this command seems a lot helpful!

Yes...

Nice command but i have to do it only as my code above :D

I want to print on the screen the names of files in the HOME of the user that the size is greater than or equal the second argument and less than or equal to the third argument. Eventually it will be...

I get this error on these lines when i run this script:"[: `)' expected,found 20
What am i doing wrong?

for i in /home;do

file2=`ls -s $i`

if [ \( $file2 -ge $2 \) -a \( $file2 -le $3 \)...

Thank you very much for your help!I will try to learn it now!And you are right!The person who wrote this is completely insane:D!In three hours he taught us the grep,sort,tr and sed command(not...

I need someone to tell me how exactly works the following code αfter /etc/passwd :eek::
cat /etc/passwd|grep "^[^:][^:][^:][^:]:"|sed '1,$s/^\([^:]*\):[^:]*:\([^:]*\):.*$/ \1 \2 /'|sort -nrk3 -t:I...

Thank you very much for the help!

I want to know what's the meaning of the following commands

first eg
^[^aeiou]*a[^aeiou]*e[^aeiou]*i[^aeiou]*o[^aeiou]*u[^aeiou]*$What does exactly the *a,*e,*i ...*$ means in this command?
I...

Thank you!It worked now!You saved my day!

The $1 and $2 are integers!

And i get this
http://i41.tinypic.com/nvwjk4.jpg

When i run the following code i get an error that says Integer expression expected!
How do i fix this?

#!/bin/bash

if [ $1 -gt $2 ];then
echo "wrong"
exit 1

fi

if [ $1...

It's on the above picture!

I want to make the following script:

Write script, which can accept two arguments from the command line. The arguments will be
integers and the first argument is smaller than the second. If the...

Ok!Thanks for the help!Problem fixed!

Every time i run this script i get an error that says ":[too many arguments"
Why is this happening?

http://i43.tinypic.com/20tngpt.jpg