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Search results for Backing Up and Restoring Using the cpio Command in Linux and Unix

FreeBSD

Upgrading FreeBSD

Post date: April 1, 2006, 05:04 Category: System Views: 3524 Comments
Tutorial quote: This document started as a follow up to The Ultimate Multimedia Server Guide and how to go about keeping your server up to date and patched with the latest O/S patches and security patches. The other reason for this document was to try and create an easy to follow update guide for the not so Unix savvy users that visit my website from time to time. My first time trying to upgrade FreeBSD from sources went well but trying to understand and piece together all the other documentation was more of a daunting task than actually upgrading.
Unix+clones

Learn REXX fast

Post date: September 1, 2005, 01:09 Category: Programming Views: 3226 Comments
Tutorial quote: If you’ve programmed under IBM operating systems, you’ve undoubtedly heard of Rexx. Rexx is the scripting and command language IBM bundles with all its mainframe, mid-range, and lower-end operating systems. What you might not be aware of is that Rexx also runs on almost every other operating system in the known universe. You can download Rexx free for all versions of Windows┬«, Linux, UNIX┬«, BSD, Mac OS, and DOS, and many other systems. It even runs on the three major operating systems for handheld devices: Windows CE, Palm OS, and Symbian/EPOC32.

What this means is, if you learn Rexx, you’ll know a scripting language that runs everywhere from mainframes to handhelds—and everything in between. Rexx is a general-purpose language that's powerful enough for mainframes yet flexible enough for other platforms. Best of all, Rexx is easy to learn.
Debian

Splitting updatedb into daily and weekly

Post date: April 21, 2006, 12:04 Category: System Views: 2508 Comments
Tutorial quote: We all appreciate the locate command when we are such in a hurry we cannot afford a full and in-elegant find. What we like a little less, though, is the updatedb script consuming up all our disk bandwidth at each boot, summoned by anacron.

Of course, this is only the case if you are running a "desktop" machine: since you turn it on when you need to do some work, then you long for a way to shorten the period of reduced usability forced by updatedb.

Inversely, if you run a server that never goes down, and you successfully schedule your updatedb tasks late at night, then this article is not for you.
Linux

Delete Qmail Server messages Queue

Post date: January 12, 2007, 18:01 Category: Software Views: 2691 Comments
Tutorial quote: qmail is a mail transfer agent that runs on Unix. It was more secure replacement for the popular Sendmail program. The author offered a $500 prize for the first person to publish a verifiable security hole in the latest version of the software.

This is a useful thing to do in a number of situations. For instance, if you are hit with a spamming attack, you can temporarily instate a second Qmail installation (once the spam run is finished), allow it to take over mail receipt,and then use this tool to clean the offending mails out of the queue before switching over to the main Qmail installation once again.
Unix+clones

Version control for non-programmers with Subversion

Post date: June 9, 2005, 04:06 Category: Software Views: 2921 Comments
Tutorial quote: Imagine a utility that lets you make an annotated backup of any of your project files with the click of a mouse or a single command. It would let you review the history of your backups and recover any version you wished. And it would integrate with your file browser and would keep track of files that have changed since your last backup. The utility exists -- Subversion, and its companion program TortoiseSVN, can help you safely manage your files as you work with them.
Solaris

How to Perform System Boot and Shutdown Procedures for Solaris 10

Post date: February 6, 2006, 07:02 Category: System Views: 10825 Comments
Tutorial quote: System startup requires an understanding of the hardware and the operating system functions that are required to bring the system to a running state. This chapter discusses the operations that the system must perform from the time you power on the system until you receive a system logon prompt. In addition, it covers the steps required to properly shut down a system. After reading this chapter, you’ll understand how to boot the system from the OpenBoot programmable read-only memory (PROM) and what operations must take place to start up the kernel and Unix system processes.
Ubuntu

Stealth Checking Xbox 360 Games With abgx360 and Nautilus

Post date: June 29, 2009, 09:06 Category: Software Views: 10930 Comments
Tutorial quote: If you’re like me, you’ve jumped through a million hoops to get abgx360gui working. But you can only get the command line interface working. No problem, we’ll create a script for Nautilus to easily launch abgx360 to check your Xbox 360 games.

Unix+clones

Chkrootkit Portsentry Howto

Post date: April 15, 2005, 23:04 Category: Security Views: 2777 Comments
Tutorial quote: This document describes how to install chkrootkit and portsentry. It should work (maybe with slight changes concerning paths etc.) on all *nix operating systems.

Chkrootkit "is a tool to locally check for signs of a rootkit" (from http://www.chkrootkit.org).

"The Sentry tools provide host-level security services for the Unix platform. PortSentry, Logcheck/LogSentry, and HostSentry protect against portscans, automate log file auditing, and detect suspicious login activity on a continuous basis" (from http://sourceforge.net/projects/sentrytools/).

This howto is meant as a practical guide.
Unix+clones

Optimizing C/C++ programs using the GProf profiler

Post date: May 24, 2005, 18:05 Category: Optimizing Views: 6544 Comments
Tutorial quote: One of the most important things to keep in mind while optimizing an application is: optimize where it counts. It is no use to spend hours optimizing a piece of code that usually runs for only 0.04 seconds anyway.

GProf provides a surprisingly easy way to profile your C/C++ application and spot the interesting pieces right away. A small case study shows how GProf was used to reduce the running time of a real-world application from over 3 minutes to under 5 seconds, by identifying 2 data structures as important and optimizing those.

Historically, the program goes back as far as 1982, when it was introduced on the the SIGPLAN Symposium on Compiler Construction. It is now a standard tool available on virtually all flavors of UNIX.
Fedora

Watching Your Power Consumption With Powertop On Fedora 7

Post date: October 1, 2007, 10:10 Category: Miscellaneous Views: 2934 Comments
Tutorial quote: Powertop is a command-line tool released by Intel that shows you the power consumption of the applications running on your system. It works best on notebooks with Intel mobile processors and can help you find out the programs that put a strain on your notebook battery. It requires kernel 2.6.21 or newer with tickless idle enabled (CONFIG_NO_HZ) (which is currently available for 32-bit kernels only). Fedora 7 comes with a 2.6.21 kernel by default, so we can use Powertop on it.
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