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Archive for the 'NIX Posts' Category

Creating associative or hash arrays in bash using sed and strings without the use of arrays, looping and conditionals.

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 […]

Apache: Configuring mod_security (modsecurity) for Apache on Fedora.

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 […]

Linux: Enable extended httpd status reports in Apache through service: fullstatus

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 […]

Web and Networking: Securing the Apache HTTPD (port 80) configuration from malicious scans.

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 […]

Fedora 10+: UI video / graphics problems upon reboot to Fedora 10+. Graphics are unreadable.

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 […]

Fedora 10: unable to authenticate user and reenabling the root login access.

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 […]

RedHat Linux Fedora: Fedora 9 to Fedora 10 upgrade.

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)  […]

Fedora & KDE: ERROR: Couldn’t attach to DCOP server!

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 […]

Linux: cups giving 404 Not Found when trying to access http://localhost:631/

PROBLEM When trying to access http://localhost:631/ for the cupsd / cups configuration, you receive: 404 Not Found SOLUTION

Terminal Emulators: Dynamically changing the tab title text in Konsole and alternative emulators.

Some time back I was introduced to konsole and never went back to terminal emulators like xterm, however a list of good tabbed linux terminal emulator alternatives is provided below in case konsole isn't available to all.  There are ones such as putty however this is an Windows ssh client.   Just the fact that […]


     
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