December 2000
Intermediate to advanced
800 pages
22h 41m
English
Content preview from Special Edition Using Linux®, Sixth Edition
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Case Study: Site Construction
Putting together all you've learned, you can now construct a good /etc/hosts.allow for your site. Here, you'll do just that.
First, see what is enabled. Use the following command to get your listing (it might be different from the text):
grep -v ^# /etc/inetd.conf | grep -v ^$| grep -v internal
The preceding command line searches (grep) inetd.conf and excludes lines (-v) that begin with #. The results are piped to another grep, which excludes blank lines (show as the regular expression ^$), and then excludes lines with the word internal:
ftp stream tcp nowait root /usr/sbin/tcpd in.ftpd −;l -a telnet stream tcp nowait root /usr/sbin/tcpd in.telnetd pop3 stream tcp nowait root /usr/sbin/tcpd ipop3d imap stream tcp ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.