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Enable core dump files on Linux

Here's how to enable core dump files to write for analysis on application crashes: # cat  /etc/sysctl.conf|grep core # Controls whether core dumps will append the PID to the core filename. kernel.core_uses_pid = 1 # Core patterns, if you want to write to directories other then where the process is currently running from (which could […]

Linux Networking: Persistent naming rules based on MAC for eth0 and wlan0

PROBLEM You've got a set of devices but their names, such as NIC / Network card names keep changing on each reboot or reconnect.  This is a continuation of Linux Networking: device eth0 does not seem to be present, delaying initialization.  where we resolved a similar issue due to naming but here we'll make it […]

Fedora Linux: Enabling the KDM login prompt instead of GDM desktop manager.

Since around Fedora 8 and KDE 4.0, the default DESKTOPMANAGER that greets you before you login to your GUI  is  set to GNOME (Even now with Fedora 13 out, the same is still true).  Now I was an avid KDE user and though I started on Gnome, KDE just grew on me up until about Fedora 12.  After […]

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 […]

MySQL DB backup.

One of the things you definitely want to take a backup of on a regular basis, especially if you are a WebAdmin/WebMaster is that of your MySQL database for things such as a forum, blog or anything else you have that may use MySQL on your site. For this you'll need telnet/ssh login to allow […]


     
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