By Michael W. Lucas
The definitive consultant to OpenBSD
Foreword by means of Henning Brauer, OpenBSD PF Developer
OpenBSD, the stylish, hugely safe Unix-like working method, is known because the foundation for serious DNS servers, routers, firewalls, and extra. This long-awaited moment variation of Absolute OpenBSD continues writer Michael Lucas's trademark uncomplicated and useful process that readers have loved for years. You'll examine the intricacies of the platform, the technical info in the back of convinced layout judgements, and top practices, with bits of humor sprinkled all through. This variation has been thoroughly up-to-date for OpenBSD 5.3, together with new assurance of OpenBSD's boot method, security measures like W^X and ProPolice, and complicated networking techniques.
You'll find out how to:
* deal with community site visitors with VLANs, trunks, IPv6, and the PF packet filter
* Make software program administration speedy and potent utilizing the ports and applications system
* provide clients merely the entry they wish with teams, sudo, and chroots
* Configure OpenBSD's safe implementations of SNMP, DHCP, NTP, sensors, and more
* customise the install and improve methods on your community and undefined, or construct a customized OpenBSD release
Whether you're a brand new person searching for an entire creation to OpenBSD or an skilled sysadmin trying to find a refresher, Absolute OpenBSD, second Edition provide you with every little thing you must grasp the intricacies of the world's safest working system.
"The definitive ebook on OpenBSD will get a long-overdue refresh."
-Theo de Raadt, OpenBSD Founder
Read or Download Absolute OpenBSD: UNIX for the Practical Paranoid (2nd Edition) PDF
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Extra resources for Absolute OpenBSD: UNIX for the Practical Paranoid (2nd Edition)
Here are some examples: # cd /usr/ports/ports-mgmt/portmanager # make install clean # portmanager -u # portmanager math/gnumeric 28 Compile and install portmanager. qxd:Toolbox 3/29/08 10:41 AM Page 29 Chapter 2: Installing FreeBSD and Adding Software Auditing Installed Packages The portaudit command (pkg_add -r portaudit) lets you check your installed packages for known security vulnerabilities. Regardless of whether or not your FreeBSD system is using the latest ports collection, you can use portaudit to check your installed packages against a database of security advisories.
Adding, Deleting, and Managing Software After installing FreeBSD, you can install additional software using either Ports or Packages. The FreeBSD ports collection approach lets you install software from source code. The Packages approach lets you install applications that are pre-built into binaries. Experts tend to use the ports system to get the latest software. New users might be more comfortable with Packages provided that bugs have been worked out in the build process. For installing binaries, the sysinstall utility lets you select where to install from (CD, DVD, FTP, and so on), then choose which packages to install.
When you switch to virtual terminal one through six, you see a login prompt similar to the following: FreeBSD/i386 (localhost) (ttyv1) login: Separate getty processes manage each virtual terminal. 02 -sh (sh) Virtual consoles are configured in the /etc/ttys file. You can have fewer or more virtual terminals by adding or deleting getty lines from that file. ) Type the following to see which ttys are configured: # grep ttyv /etc/ttys ttyv0 “/usr/libexec/getty Pc” ... cons25 on secure Using the Shell After you open a shell (whether from a text-based login or Terminal window), the shell environment is set up based on the user who started the shell.