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Back to Basics Unix Utilities Variances
One thing is for certain: Unix is complicated. Linux does it one way, Solaris another, and all the BSDs, yet another. Fortunately there is some logic behind the differences. Some differences have to do with where the OS came from, and some were deign choices, intended to improve usability. In this article we’ll talk about a few major differences between the Unix variants, and tell you what you need to know about various differences in command-line utilities. |
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Five Things You Didn’t Know About Disaster Recovery
Disaster recovery plans are useful for more than just audit compliance; if carefully constructed, they can actually work. Purchasing a newfangled Oracle database replication license, for example, is a very small, almost irrelevant part of the overall disaster recovery plan. Let’s talk about some of the things disaster planners frequently overlook. |
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Back to Basics: Unix File Permissions
The most basic, yet important part of mastering Unix is to fully understand the nuances of file permissions. Tools exist to manage permissions easily, but true enlightenment and quick troubleshooting skills come to those who wholly master the concept. Remember, 80% of Unix problems are permissions issues. |
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D: The DTrace Scripting Language To get the most out of DTrace, you’ll need to dive into the D scripting language a bit. The ability to ask an arbitrary question of a system—DTrace’s claim to fame—is fully realized when you venture outside of others’ pre-programmed scripts. To add to last week’s DTrace introduction, we’ll now cover how the D language works. |
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Password Security Myths If you haven't already heard, you should be writing down your passwords. Good password security practices don't dictate that you must remember everything. Why would you want to, and what is the best way to do this securely? These, and other important questions will be answered in this article. People have a tendency to pick horrible passwords. After all, it's something they know, and if they don't tell anyone, it's secure. Long, long ago passwords based on names or dictionary words were ousted as trivial to guess. Automated password guessing attempts run all the time. |
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DTrace
Now that DTrace is available in OS X 10.5 (Leopard), I won’t be called a Solaris bigot for praising it. Thank you, Apple. DTrace is the most innovative software released for any Unix flavor this century. It allows a never-before-imagined level of system visibility, enabling sysadmins, developers, and even users to get answers to previously impossible questions. This week we’ll talk about DTrace and how to use it, then next week we’ll dive into a D scripting tutorial. |
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