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While movie players (such as VLC) prevent the GNOME screensaver from activating during movie playback, playing Flash videos does not affect the screensaver, which means having to move the mouse occasionally, or turning off the screensaver while watching YouTube videos and the like. There is no perfect solution to this, but using a script, it . . . → Read More: Prevent GNOME screensaver during full-screen Flash videos According to the documentation, the utf8::decode() function should generally set/turn on the UTF-8 flag for a string that contains multi-byte characters. However, apparently, there are circumstances under which utf8::decode() may not only not set the flag, but may actually unset/clear/turn off the flag for a string that contains multi-byte characters. The following script contains 4 . . . → Read More: utf8::decode() may actually unset the UTF-8 flag This guide examines setting up chroot’ed SFTP-only user accounts under Virtualmin. The Rationale: SFTP is a secure alternative to FTP and FTPS that uses SSH. With this setup, no FTP server is needed, as the native sshd server is used instead, SSH does not require an SSL certificate (like FTPS), and is usually considered more . . . → Read More: Virtualmin + SFTP + chroot The UTF-8 (Unicode) character encoding system is a well supported alternative to the older ISO-8859-1 (Latin-1) system that can make it easier to work with special characters and multiple languages. Many developers can exercise sufficient control over their system to ensure that: All Perl source code is encoded in UTF-8 All text input files and . . . → Read More: Perl: Default to UTF-8 encoding The W3C CSS validator is an online service for checking a stylesheet for standards compliance. This service can be accessed in Perl via the WebService::Validator::CSS::W3C module, which is handy for automating validation. However, for checking a large number of stylesheets, it is better to run a local install of the validator so as not to . . . → Read More: Perl access to local install of the W3C CSS validator This is a comprehensive jQuery solution to the Scrolling Anchors effect. Typical solutions replace the browser’s native “jump-to” behaviour for local anchors with a smooth scrolling effect, but fail to replace all other functionality related to local anchors. This solution: Adds the link to the history like the browser does natively Respects event bubbling like . . . → Read More: jQuery Scrolling Anchors Tracking down the source of a memory leak in Linux is not always straightforward… Signs of a Memory Leak: Typically, the first sign of a memory leak is the oom-killer. If programs start dying inexplicably, check the system log (usually /var/log/messages) for evidence of the oom-killer in action. This should be accompanied by low memory . . . → Read More: Linux memory leak detection Say you want to install a program in Fedora… Before Compiling: Many programs are available easily in the Fedora repositories via yum. If you don’t already have a graphical package management tool, then install PackageKit or yumex. If you prefer the command-line, then (as root / under sudo) use: >yum search <program> to see if . . . → Read More: Compiling programs in Fedora This is in an Apache::ASP based system, but should theoretically work in any web environment. I wanted to create a global default error handler ($SIG{__DIE__}) that displays the error text on the page. Some notes: It is generally recommended that run-time errors be trapped on a case-by-case basis using try/catch style eval statements. A global . . . → Read More: Perl global error handler In the current GNOME shell, Xinerama, the feature that supports more than 2 adjacent displays, is broken. With my nVidia card, the native Nouveau driver doesn’t even detect the 3rd output. The proprietary nVidia driver detects 3 outputs, but cannot enable all of them simultaneously, even without Xinerama (ie, as separate X displays). 🙁 So . . . → Read More: Dual-monitor + TV |
