Articles tagged with: unix
So you want to be a Unix sysadmin?
April 07, 2013, 10:41 PM — Thinking about becoming a Unix systems administrator?
The good, the bad, and the challenging
After several decades of administering Unix systems, I know more than I’d like to admit about …
Unix commands and tools you just can’t live without
March 31, 2013, 8:42 PM — On Unix systems, there are commands that do what they need to do and then there are commands that knock your socks off day after day, saving you …
Unix: When pipes don’t make sense
March 24, 2013, 5:17 PM — It’s been nearly twenty years since I first came across the Useless Use of Cat (UUOC) awards. Unix notable and Perl disciple Randall Schwartz had begun handing out …
Unix: Rooting out the kits
March 17, 2013, 8:06 PM — Rootkits are both tricky and stealthy, but there are still some things that you can do if you suspect that one of your Linux system has been infected. …
Unix: Rootkit detection and prevention
March 10, 2013, 3:47 PM — Last week’s posting was a reminder of how stealthy and dangerous rootkits can be. They hide in your operating system and compromise your systems and your data as …
Unix: Rootkits — Still scary after all these years
March 03, 2013, 2:50 PM — Don’t think viruses, Trojans and APTs are the only security problems that you need to worry about these days. Rootkits are still one of the most stealthy, potentially …
Unix: Looking at files this way and that
February 10, 2013, 1:46 PM — Unix systems as part of the base OS have a number of commands that can help you characterize files that strike you as suspicious. Even without a …
Server and Network Monitoring with iPhone
What is a Unix sysadmin doing with an iPhone, you ask? It was a birthday present, if that’s all right with you. I know, I should have gotten something odd with a beta version of …
Windows Network Troubleshooting Script
I try my best to stay away from Windows. I wish my clients did the same. The usual difficulty of troubleshooting elusive network performance problems is amplified many-fold when there is a Windows computer at the end of the line. With Unix it’s relatively simple: run tests “a”, “b”, “c”, etc and follow the familiar process of elimination. With Windows in the picture the number of steps uses up all of the English alphabet and spills over well into the Russian one. And when you finally reach step “я”, you have to pull out your Chinese dictionary.
How to Interview a Unix SysAdmin
“You see,” he explained, “I consider that a man’s brain originally is like a little empty attic, and you have to stock it with such furniture as you choose. A fool takes in all the …
Wget and User-Agent Header
As you may already know, Wget is a popular (particularly in the Unix world) command-line downloader and Web crawler application. You can read more about Wget in one of my earlier posts on the subject. …
Numeric File Permissions in Unix
Suppose you are working with a Web server and your task is to make sure that no files or directories have permissions “777″. It would be easy to just recursively change permissions for all files …
Korn Shell Arrays
Here are a few useful examples of how to use data arrays within Korn shell. Arrays are a great tool for storing user input and other data for quick, on-the-fly access. If, for example, you …
Linux performance tuning
Linux Performance Tuning
April | May 2007 | by Jaqui Lynch
Note: This is the second article in a two-part series. The first installment was published in the February/March issue.
In last issue’s article I introduced basic Linux* …
Contacting the sysadmin from command line
If you are a sysadmin, communicating with your users is an important aspect of your job. Phone, e-mail, SMS, and various service request systems are commonly used by most businesses. The problem with all these …
Changing time
Unix systems record several time parameters associated with files. Sometimes you might need to set time parameters on a file to a particular value. Or you might need to modify a file without changing any …
NFS-mount “Permission denied” error
NFS is a relatively uncomplicated functionality of any Unix system. However, from time to time you are bound to run in the “permission denied” error while trying to NFS-mount a filesystem. Everything seems to be …
Wget examples and scripts
Wget is a command-line Web browser for Unix and Windows. Wget can download Web pages and files; it can submit form data and follow links; it can mirror entire Web sites and make local copies. …
Basic Exceed configuration
The following is a list of steps for basic configuration of Exceed to connect to Unix servers.
Unix Files Transferred To CD
In our example we were requested to archive a 741 mb directory to CD. The source data resided on a Unix data server.
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