By Arnon Weinberg, on July 8th, 2013 A newer version of this script is now available.
This script is used to save and restore a desktop session.
Why this script?
Some desktop managers do offer some session management features. Under GNOME it may be possible to run gnome-session-properties manually and turn on “Automatically remember running applications when logging out”. However, some GNOME . . . → Read More: GNOME session save and restore
By Arnon Weinberg, on March 31st, 2013 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
By Arnon Weinberg, on November 23rd, 2012 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
By Arnon Weinberg, on October 8th, 2012 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
By Arnon Weinberg, on June 20th, 2012 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
By Arnon Weinberg, on June 19th, 2012 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
By Arnon Weinberg, on May 26th, 2011 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
By Arnon Weinberg, on March 15th, 2011 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
By Arnon Weinberg, on February 7th, 2011 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
By Arnon Weinberg, on December 25th, 2010 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
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