The problem
Sometimes software packages require setting some environment variables for its proper execution. When these variables clearly have no effect on any other applications in the system, that’s fine. When they want to manipulate some sensitive variables, which other applications may depend on, that’s a whole different story.
When it’s a single executable, the problem is [...]
This is just things I wrote down while playing with QEMU/KVM virtualization, for my own purposes of packing two existing computers into a third one. There is no point to make here, and neither do I expect anyone to understand this. It’s published because I don’t care to.
Log files
There are definitely two files one wants [...]
What I wanted
All I wanted was a software RAID-5 on three disks with a whole disk encryption on Fedora 12. For some reason, I thought the installation script would do that for me.
The relevant part in the installation procedure was kind enough to allow me to set it up in the GUI, but when I [...]
Introduction
I have an old Mustek 600VA UPS with RS-232 connection. Since I change the battery every couple of years on my own, I find it pretty pointless to throw it away.
And my brand new computer (running Fedora 12) has an RS-232 port if one insists to use a connector on the motherboard. Needless to say, [...]
This is yet another bunch of things I wanted written down, in case I need them one day. No certain order here.
The root mount
Grub gives the following kernel parameter:
root=/dev/mapper/vg_short-lv_root
Meaning, that the kernel has the LVM module in place when starting off (I suppose it’s kicked off in the initrd stage)
Boot image
Open a boot image (note [...]
Copying gigabytes of disk can get the system sluggish. On Linux, the solution is so simple. If process 18898 happens to take control of your disk, just go:
ionice -c 3 -p 18898
And you have your computer back. “-c 3″ means class 3, which is idle class. In other words, take the disk when nobody else [...]
A short note about installing libraries on an Intel 64 bit machine (Fedora 12 in my case).
It all starts with a short conversation like this one:
[root@short Downloads]# rpm -i VirtualBox-3.1-3.1.2_56127_fedora12-1.x86_64.rpm
error: Failed dependencies:
libQtGui.so.4()(64bit) is needed by VirtualBox-3.1-3.1.2_56127_fedora12-1.x86_64
libQtOpenGL.so.4()(64bit) is needed by VirtualBox-3.1-3.1.2_56127_fedora12-1.x86_64
THE WRONG THING TO DO IS:
[root@short Downloads]# yum install libQtGui.so.4
because it will install the [...]
