30 Sep 2007 Text to image using imagemagick
convert -size 200x30 xc:transparent -font /usr/share/fonts/dejavu/DejaVuSansMono.ttf -fill black -pointsize 12 -draw "text 5,15 'this is just a test'" test.png
Tags: convert, imagemagick, PNG
Posted by Hans-Henry Jakobsen
28 Sep 2007 Ubuntu Linux 7.10 Beta on HP Compaq 8510p (laptop)
I experienced problems booting the install-CD for both Ubuntu 7.04 and Fedora Core 7 on my HP Compaq 8510p laptop because the kernel didn’t have the correct SATA driver, so I decided to try the beta of Ubuntu 7.10.
The booting problem was fixed on 7.10 Beta and the installation process halted at 88% “importing documents and settings”.
The solution I came up with was to disable the migration tool and then run the installer from a terminal window with the following option:
ubiquity --no-migration-assistant
Tags: 8510p, Compaq, Debian, Fedora, HP, SATA, ubiquity, Ubuntu
Posted by Hans-Henry Jakobsen
28 Sep 2007 sudo a command as another user than root
sudo -u username command
Posted by Hans-Henry Jakobsen
27 Sep 2007 Install Geo::IP Perl Module on Debian Etch
This post describes how to install MaxMind Geo::IP perl module on Debian Etch.
You need the GeoIP C library (that includes also the free GeoLite Country database). This is fortunately available in the Debian repositories.
apt-get install libgeoip1 libgeoip-dev
To install the GeoIP perl module, we need to download the perl module locally from MaxMind or from CPAN. Uncompress the file and compile.
perl Makefile.PL make make test make install
Tags: apt-get, Debian, geoip, perl
Posted by Hans-Henry Jakobsen
26 Sep 2007 Advanced APT user tricks
Debian/Ubuntu apt-get tricks.
Basics
Install software
apt-get install foobar
Search software
apt-cache search foobar
You can query files to see which packages own them, or query packages to see which files own them.
Installing apt-file
apt-get install apt-file
Build apt-get file information cache
apt-file update
Query through the packages to determine which package contains the file
apt-file search mysqld
Query the other way around, you know the package name and would like info about all the files which are provided by a given pacage:
apt-file list mysqld
List all installed software/packages
dpkg --get-selections > software.txt
That will save your installed list to a file called software.txt. That list is every piece of software required to reproduce the state your PC is currently in.
Another way to get a full list of installed software is to run the command
dpkg --list
To restore a PC the list above
# dpkg --set-selections < software.txt # apt-get dselect-upgrade
Clearing up space
Delete archived packages that are considered old.
# apt-get autoclean
Delete all archieved packages
# apt-get clean
Remove every file from a package
apt-get remove foobar --purge
Tags: apt-cache, apt-file, apt-get, Debian, dpkg, Ubuntu
Posted by Hans-Henry Jakobsen
