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Member since: June 2008
Sandra Henry-Stocker has been administering Unix systems for more than 25 years. She describes herself as "USL" (Unix as a second language) but remembers enough English to write books and buy groceries. She currently works for TeleCommunication Systems -- a company that builds innovative technologies to make critical connections happen -- where no one else necessarily shares any of her opinions. Send comments and suggestions to email@example.com.
- One of the best ways to write scripts quickly and effectively is to never start from scratch.
2 days 20 hours ago
- When building scripts, a little consistency and care can pay off in the long run.
1 week 2 days ago
- Traceroute is still a great tool, but mtr ("my traceroute") provides even more insights when you're looking into network routing problems.
2 weeks 2 days ago
- If you'd like to know a lot more about your ethernet interfaces than ifconfig will ever tell you, it's time you take a look at ethtool.
3 weeks 3 days ago
- The /proc file system brings the processes on your Unix systems into view in some very useful ways, but only if you take the time to cd over to /proc and see all it can tell you.
4 weeks 2 days ago
- Think you know what's happening on your network? Pull out tcpdump and you might be surprised how much it can tell you.
5 weeks 1 day ago
- If you find your thrill delving into the networking side of Unix, you'll find that there are lots of commands to give you all the insights you might want.
6 weeks 1 day ago
- One of the most important things you can do for security on a Unix system is restrict root access. But the issue is more complicated than who knows root's password.
7 weeks 1 day ago
- Don't forget that tomorrow is Sysadmins Day -- a good day to show love to the folks who save your butt again and again when you mess up your computer. Here are some poems, tailored just for them.
7 weeks 6 days ago
- Memory is one of the most important parts of your Unix system for performance. Let's look at some commands that will tell you what you need to know about the memory on the systems you manage is being used.
8 weeks 2 days ago
- It's no longer just a matter of "Can you remember them?". Your passwords can serve as a form of catharsis or a way to remind yourself of where you want to be in life.
9 weeks 3 days ago
- The top command is one of the most commonly used tools for getting a quick glimpse at performance, but it's rarely used to capture performance in the middle of the night. With just a little effort, however, it could become one of your favorite tools for off-hours capture of performance data.
10 weeks 1 day ago
- The diff command can be your best friend when you’re troubleshooting problems on a Unix system, but are you using it effectively as you could?
11 weeks 3 days ago
- Sandra Henry-Stocker wrote Unix: Penetration Testing: A Hands-On Introduction to Hacking by Georgia Weidman, no starch press, 2014Most everything you need to know to get started as a penetration tester in less than 500 pages? This book provides a very practical hands-on introduction to the art of hacking. But you will need to sit yourself down and let your fingers get a lot of exercise before you put yourself on the market as a pro.
12 weeks 2 days ago
- If you're going to be shooting out email messages as part of your job, you really ought to think about your recipients' reactions. Here are some of the least reader-friendly subject lines and why they likely won't work.
13 weeks 1 day ago
- History repeats itself and so will system problems if you don't get to the root of what is causing them.
14 weeks 2 days ago
- Discovering hosts and services isn't just something that hackers do. A good sysadmin needs to work with an up-to-date view of the systems they manage or those they want to keep an eye on.
14 weeks 6 days ago
- Long before the Internet, the web, flat screen monitors, Google, Facebook, languages like Python and Ruby, interactive games, and wireless just about anything, some of us were fascinated by what we could do with large, clunky systems that today look more like dinosaurs to us than computers.
16 weeks 1 day ago
- Before you try to try to get your Unix system collecting data from a database that someone else manages, you might want to run some simple tests from a Windows desktop. Yes, I said "Windows".
17 weeks 2 days ago
- Keeping an up-to-date inventory of your Unix servers can be less painful if you throw a bunch of helpful Linux commands into a script that you run periodically.
18 weeks 1 day ago
- If you've been managing Unix systems for any length of time, you've undoubtedly noticed that the systems you manage develop personalities and start to feel like family.
19 weeks 2 days ago
- Get yourself a $35 computer, a copy of this book, and you will likely discover a side of computing that expands your view of what computing is all about.
20 weeks 3 days ago
- Unix tools make it easy to find strings in files, but what if you want to find specific whole words, more complex text patterns, or every instance of a word or pattern?
21 weeks 2 days ago
- The top command is one of the most useful commands for getting a quick glimpse into how your Unix server is performing, but stopping there might mean that you're missing out on a lot of interesting options.
22 weeks 2 days ago
- You can spend 50-60 hours a week managing your Unix servers and responding to your users' problems and still feel as if you're not getting much done or you can adopt some good work habits that will both make you more successful and prepare you for the next round of problems.
23 weeks 3 days ago
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