PROBLEM
On Linux, you receive this error when trying to open up links from inside Thunderbird emails:
Error showing url: Failed to execute child process "/usr/lib/firefox-3.0.5/firefox" (No such file or directory)
SOLUTION
PROBLEM
Just today an issue came up for me installing the google toolbar. (This Google toolbar has been in Beta for a while now, which caught my attention and may or should catch yours: Beta releases are buggy. That may be beside the point though since I don’t care as long as it does it’s job well since some company’s betas are better then other companies official releases. :) )
I got this cryptic error:
Firefox could not install the file at
http://dl.google.com/firefox/google-toolbar-beta-linux.xpi
because: Signing could not be verified
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Hashes are a certainly very important part of any language. If you’re not used to hashes, you may not see their potential at first. However, having used them in several languages now, hashes always ended up reducing my code significantly especially when only complex solutions would only do otherwise. However, bash or ksh for that matter, don’t really come with such a construct. Reading up on how to do such a thing really didn’t provide any elegant solutions that I wanted for most scenarios. What I really wanted is something that had these features: Read the rest of this entry »
INTRODUCTION
Most people today know or have some idea what a firewall is. For those not too familiar with it, it’s essentially a piece of software or hardware that sits between your computer and the internet (outside world) helping to prevent unauthorized access to your computer / workstation. The firewall does this by blocking certain ports on your workstation that applications normally use to communicate with over networks. It does this to hide vulnerable applications from being exposed to potentially malicious break in attempts. The firewall’s granularity typically reaches and is limited to filtering the type of protocols allowed on as little as a single IP, the direction (IN / OUT = TO / FROM your computer) of the traffic and as broad as blocking entire sets of IP’s (For example 50.N.N.N - 150.N.N.N). This is really the broad range of what a typical firewall can do. Read the rest of this entry »
Apache HTTPD is the most popular web server to date. It’s extensible and configurable to meet various needs both small and big. Here we’ll focus on extending it’s reporting functionality by enabling full status capability to see more granularity in status reports. As you probably know, the service on Red Hat Linux systems can be controlled with the service command like this: Read the rest of this entry »
It’s still a surprise to most just how much scanning and probing by either hackers or malicious software is going on on the web when they do find out. I mean, do you really know how many times your workstation or home network get’s hit by attempted intrusions and invasions? I was never able to find this sort thing out or to see it until I ran Linux. This, imho, makes the Linux OS a bit more open to reporting such things, which is one of the things I like about it.
Just recently looking over my logs I see there is a large 0-Day scan hitting boxes around the web with regards to the roundcube webmail application. The scan has been spreading over the web and has now been hitting my box since yesterday. Initially I responded with an ad-hoc solution to this and I’ve blocked some IP’s namely the ones below: Read the rest of this entry »
PROBLEM
One of the first things that went wrong after upgrading to Fedora 10 was the UI screen was unreadable / undescernable. The screen was entirely messed up and though the keyboard worked fine, it wasn’t easy to discern the UI windows from the shades of red, yellow, blue, green etc grany dots that showed up. In my case, I’ve solved this by lowering the video resolution in the below manner. I have the ATI Radeo 9600 card.
SOLUTION
PROBLEM
In Fedora 10, the root login was disabled into the GUI, giving you a unable to authenticate user message. You may have noticed that you got a warning about this in Fedora 9 but it wasn’t yet disabled then. Not so in Fedora 10 so this might be something you would want to do prior to rebooting after upgrading to Fedora 10. I’m not all too surprised this eventually happened. It’s not uncommon to hear of logging in as root in the GUI being discouraged whereever you happen to ask. So essentially the pot finally boiled over and we no longer have this option standard at least on the latest Fedora releases. This effects Gnome, KDE and the whole lot.
Essentially the problem relies in the GDM file and here is how to bring this back:
SOLUTION
Well folks, it’s upgrade time again. It’s been raining releases from Fedora lately, each one coming out almost every 6 months so here we are. My own installation is over 4 years old and I took it from Fedora 1 to Fedora 10 in that time. (You can search here for the older upgrade procedures) So the process RedHat has put together for upgrades is fairly robust. The Fedora 9 to Fedora 10 upgrade follows the general procedure outlined on the first Fedora Core upgrade page (Hasn’t changed in years, which is good):
DCOP server is essentially communication software used by various Linux systems to allow applications to talk to each other. For example, copying and pasting from kword to say firefox would occur through klipper (KDE clipboard) currently and the way the copied data moves between these applications is DCOP. More recently, DCOP has been started to be phased out in favour of DBUS, a new messaging system implemented in KDE 4.X (Recently 4.0, 4.1, 4.2). (While digging for a solution here, I had a stab at using DBUS however according to this article, konsole hasn’t yet been updated to use DBUS) This particular change occurred more recently and prominantly between Fedora 8 to Fedora 9 upgrade discussed in another article here. One of the issues to this problem is that in the process of moving from KDE 3.X to KDE 4.X is that the dcopserver is no longer turned on by default. Unfortunately, applications such as konsole have not yet been udpated to use DBUS and so scripting these applications as one would normally do using DCOP, no longer work and functionality like renaming tabs in konsole dynamically therefore no longer work either using traditional methods. Below is how to go about resolving a part if not all of the issues related to it and how we can reenable it to reduce errors between old applications on a distribution.
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