grep command line - some confusion - Webmaster Forums - Webmaster forum for HTML, PHP, ASP, CSS and more

Leofeo · 02-05-2007, 12:12 PM

I am learning to use the grep command, so far so good but it is a little confusing... specially since I don't have a book and my only resouse is some websites. Any one has recommendations for books?

I am trying to search for 'aaa' or 'aaaa' or 'aaaaa', something with those characteristics... from lets say the /etc directory. I also want to add two lines of context before and after each keyword found.

I started doing this

Quote

Code:

[root@localhost ~]# grep  x\{3,5\} /var

But I don't know where to put the spaces and if I am using the right character, I did this with no errors but I am not sure if I am doing it right.
Quote

Code:

[root@localhost ~]# grep  x**\{3,5\**} /var

Now... what if I want to find multiple words, which is the AND command?

I learned the OR command [
Code:

Code:

root@localhost ~]# grep -nr 'gold\|silver'

What if I want to search for lets say : gold and silver and copper and diamonds and sand
Is this accepted?
Code:

Code:

grep -w '\<gold\ silver\copper\ diamonds\>'

Any clarification will help alot.
Thank you!