Duplicating WordPress Installation
Whenever you upgrade your WordPress installation or do development work, it is always a good idea to be working on a copy of your main site and not on the real thing. Copying WordPress installation is not exactly difficult, but it is a bit tedious, which is the reason why many Webmasters apply changes directly [...]
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21. December 2008
Linux and High I/O Wait
When you look at the CPU activity of your computer, one of the parameters is the iowait. This value shows how much time your CPU wastes while it is waiting for I/O operations for complete. These include disk read/write operations, network, IPC, etc. Is this behavior a problem and, if so, what causes it and [...]
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9. June 2008
Data Security and Online Privacy
You have information on your computer that you don't want others to see. Sometimes you want to share information with someone, but you don't want anyone to know that you are the one sharing it. Let's say that you came across some information suggesting that your employer may be breaking law. You want to make this information public, but you can't do it openly becausloe you will be fired. Another example: you are at work and you need to send a personal, confidential email...
Continue reading...29. June 2009
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. One issue with Wget is that some sites block it from accessing their content. This is usually done by adding [...]
Continue reading...27. June 2009
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 to something like 644, but this may cause unexpected problems. You only need to change those files and directories that [...]
Continue reading...25. June 2009
Restart Apache, MySQL When Low on Memory
Heavy traffic, hungry SQL queries, leaky applications will eventually leave your server low on memory. Apache will go on a hunt for swap space and MySQL will start freezing in thoughtful contemplation. Your hard drives will start scratching like a pack of homeless dogs and suddenly everything will become very very s l o [...]
Continue reading...25. June 2009
MySQL Global Search and Replace Script
A day will eventually come when your need to find and replace a string of text in your database. You don’t know which row, or which column, or which table. Heck, you may not even know which database. Your options are: spend the rest of the summer hunting down the elusive table cells, or use [...]
Continue reading...25. June 2009
Passing MySQL Commands from Shell Script
Running MySQL commands from a shell script is a relatively simple task that has a lot of people baffled. Some say its too complicated and suggest using PHP or Perl, others claim doing so is a security risk (a favorite excuse of the ignorant), and some resort to using a shell script to writing SQL [...]
Continue reading...11. June 2009
WordPress Directory Listing Risk
A large number of WordPress directories do not have an index file. This is particularly dangerous in case of the plugins directory. If your server allows directory listings, a potential attacker may see which plugins you have installed. Most plugins have security vulnerabilities. One way of fixing this is by adding the following line to [...]
Continue reading...18. May 2009
DownThemAll! “No free space” error
DownThemAll! is a popular download manager for Firefox Web browser supporting multi-part downloading with ability to pause and restart downloads without losing data. A common problem encountered while using DownThemAll! is the dreaded “no free space” error. Before initiating a download, DownThemAll! makes sure you have enough disk space. Let’s say you want to download a [...]
Continue reading...9. March 2009
Controlling Process CPU Utilization
Let’s say there is a process on your Unix/Linux system that sometimes tends to consume all CPU resources and become unresponsive. At the same time, you do not want to terminate the process at the first sign of trouble, because momentary high CPU utilization may be legitimate. The solution is to continuously calculate the running [...]
Continue reading...1. January 2009
Encoding Videos for XBox 360 and PS3
Both Xbox 360 and PS3 support a variety of video codecs and are capable of playing high-definition video files. One of the most popular formats for HD video files is Matroska (MKV), which provides excellent video quality, relatively small size, multiple audio tracks and many other cool features. Unfortunately, neither Xbox 360 nor PS3 currently [...]
Continue reading...19. December 2008
Sharing Videos from Linux to Xbox 360
Xbox 360 uses UPnP protocol to stream multimedia files from computers on your home network. Normally, you would have a Windows PC running WMP and sharing files. But what if you have a Linux box instead? There are several applications capable of sharing videos and music from your Linux computer to Xbox 360, as well [...]
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Linux Today
- Apple Wary of Ogg Theora: No Agreement Yet on HTML5 Video StandardLinux Magazine: "Apple refuses to implement Ogg Theora in QuickTime by default in Safari, complaining of lack of hardware support and patent issues." […]
- Freedom is not Free for Countries nor Computer UsersThe ERACC Web Log: "Is it correct to compare the freedom of Free Open Source Software (FOSS) to the freedom gained from the Revolution of the States?" […]
- Eyecandy Themes For Ubuntu - Download directly from Synaptic - No More HasslesUbuntu Manual: "But there is an option to download it from PPA launchpad repo itself, which is always the safer bet. Special thanks to the Zgegblog guys for contributing these out of the world themes for Ubuntu users." […]
Slashdot
- Good PDF Reader Device With Internet Browsing?ranjix writes "I need a handheld device which would allow me to read ebooks and/or browse the internet while actively and intensely laying in the hammock (and Yes, I do have a hammock in my mom's basement). I'll try to sum up the basic requirements: (good) PDF reader (and ebooks of whatever sort), WiFi connectivity and Internet browser, screen […]
- Nokia's Maemo Switching To Qtsuka writes "During a keynote at the Gran Canaria Desktop Summit, Nokia's Quim Gil announced that a future release of Maemo is going to be built around Qt. Maemo Harmattan is going to switch away from GTK+ / Hildon, derStandard.at reports from the conference." Michael Pyne also writes with a post describing day one of the conference from a KDE […]
- Planck Telescope Is Coolest Spacecraft EverHugh Pickens writes "Launched in May, BBC reports that Europe's Planck observatory has reached its operating temperature, a staggering minus 273.05C just a tenth of a degree above what scientists term "absolute zero." and although laboratory set-ups have got closer to absolute zero than Planck, researchers say it is unlikely there is an […]
- Best of Web Design
- Google Tips and Tricks
- Convert Images to PDF
- What's the Best CMS
- Partitioning System Disk
- Random Filename Chooser
- Linux and High I/O Wait
- Tips on dealing with the Bagle rootkit
- Sharing Videos from Linux to Xbox 360
- Encoding Videos for XBox 360 and PS3
- Tips on dealing with the Bagle rootkit (6)
- Log Monitoring (2)
- CUPS printing on Solaris 10 (2)
- Creating table indexes in MySQL (2)
- Find largest files (1)
- Solaris boot disk copy (1)
- NetBackup statistics, Part I (1)
- Wget examples and scripts (1)
- The correct MySQL GRANT syntax (1)
- Installing and Configuring Ganglia (1)
- Duplicating WordPress Installation
- Linux and High I/O Wait
- Data Security and Online Privacy
- Effective Virus Protection
- Highly redundant array configuration
- AI Research: Playing Mind Games
- Your unsecured Wi-Fi network
25. June 2009
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