Mi blog lah!

Have been trying to down­load Ubuntu 7.04 DVD edi­tion for the last few days. I use the amaz­ing wget pro­gram with the com­mand line look­ing like

wget -c http://​www.​mir​rorser​vice.​org/​s​i​t​e​s​/​c​d​i​m​a​g​e​.​u​b​u​n​t​u​.​c​o​m​/​c​d​i​m​a​g​e​/​r​e​l​e​a​s​e​s​/​7​.​0​4​/​r​e​l​e​a​s​e​/​u​b​u​n​t​u​-​7​.​0​4​-​d​v​d​-​i​3​8​6.iso

I star­ted off the down­load in Win­dows, and over the course of the days I would inter­rupt and restart the down­load depend­ing on what I was doing (the -c para­meter lets you do that). To make it easier, I wrote a batch file with the com­mand. I named the batch file CMD.BAT and I placed it in my home folder. All nice and well.

While the down­load was run­ning, I wanted to open a new com­mand prompt window, so I clicked on Start/Run…
Instead of get­ting a blank com­mand prompt window, I get another instance of a wget down­load, for the same file. What does that mean? Well, YOU CAN BYPASS Start/Run… BY SIMPLY ADDING CMD.BAT IN YOUR HOME FOLFER.

Sadly, wget does not do any file lock­ing, so I was expect­ing the worse. I let the down­load con­tinue anyway and then I would check the checksum.

Down­load fin­ishes, the check­sum is wrong :(.

What to do now?

I kept a note on the file size when both wget com­mands where run­ning on the same file. So, I should simply cut off the bad part and con­tinue the down­load from there. Booted in Linux and I did a

split -b 3750000000 ubuntu-7.04-dvd-i386.iso

Two file were cre­ated, xaa and xab. I throw away xab and I rename xaa into ubuntu-7.04-dvd-i386.iso.
Now, ubuntu-7.04-dvd-i386.iso con­tains the cor­rect con­tent but is not the full size. So, I con­tinue with

wget -c http://​www.​mir​rorser​vice.​org/​s​i​t​e​s​/​c​d​i​m​a​g​e​.​u​b​u​n​t​u​.​c​o​m​/​c​d​i​m​a​g​e​/​r​e​l​e​a​s​e​s​/​7​.​0​4​/​r​e​l​e​a​s​e​/​u​b​u​n​t​u​-​7​.​0​4​-​d​v​d​-​i​3​8​6.iso

Once completed,

$ md5sum ubuntu-7.04-dvd-i386.iso
ca609edf086eea0c821ba34a5c0a709d ubuntu-7.04-dvd-i386.iso
 $

which is the same check­sum repor­ted at
http://​www.​mir​rorser​vice.​org/​s​i​t​e​s​/​c​d​i​m​a​g​e​.​u​b​u​n​t​u​.​c​o​m​/​c​d​i​m​a​g​e​/​r​e​l​e​a​s​e​s​/​7​.​0​4​/​r​e​l​e​a​s​e​/​M​D​5SUMS

Suc­cess!

Tags: Linux, planetellak, ubuntu //