Works for me. Logs demonstrating download, extraction and examination of
the current bullseye version of 0ad-data are attached. Here is an
excerpt.
$ ls -l /var/cache/apt/archives/0ad-data_0.0.23.1-1.1_all.deb
-rw-r--r-- 1 root root 701833824 Jan 1 2021
/var/cache/apt/archives/0ad-data_0.0.23.1-1.1_all.deb
$ md5sum /var/cache/apt/archives/0ad-data_0.0.23.1-1.1_all.deb
b2b6e5510898abf0eee79da48995f92f
/var/cache/apt/archives/0ad-data_0.0.23.1-1.1_all.deb
$ apt-cache show 0ad-data/bullseye | grep MD5sum
MD5sum: b2b6e5510898abf0eee79da48995f92f
According to your first message, the MD5sum of your copy is
"2688ba115bc50916975827a9f57052bd". There is an MD5 mismatch on the copy
of 0ad-data_0.0.23.1-1.1_all.deb that you have obtained. This can be
caused by hardware or software malfunction or incompatibility on your
computer. It could also be caused by data corruption or tampering on the
mirror from which you obtained the file.
Try downloading the file from a different Debian mirror. Also test
downloading and installing 0ad-data version 0.0.23 on a different
computer.
Please check the system that has the MD5sum mismatch for bad RAM (run
memtest86+), a failing hard drive (use smartmontools/smartctl) or other
hardware problems.
I once had a problem with single-bit errors in files stored on an old
computer. I later discovered that the there were distended (bulging and
failed) capacitors in the power supply and motherboard. If you want to
know what failing capacitors look like, go to https://badcaps.net/ and
click "How to Identify" at the left. Note that capacitors might fail
without visible signs.
Another time that I observed apparent data corruption was during testing
of new RAM. Kernel compilation failed intermittently with segfaults.
This turned out to be caused by a bug in the Linux kernel.
Thanks.
root@five-o:~# apt-get install --download-only 0ad-data/bullseye
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Selected version '0.0.23.1-1.1' (Debian:11.0/stable [all]) for '0ad-data'
Suggested packages:
0ad
The following NEW packages will be installed:
0ad-data
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 702 MB of archives.
After this operation, 2,093 MB of additional disk space will be used.
Get:1 https://mirrors.wikimedia.org/debian bullseye/main amd64 0ad-data all
0.0.23.1-1.1 [702 MB]
Fetched 621 MB in 1min 29s (7,006 kB/s)
Download complete and in download only mode
$ dpkg-deb --raw-extract ./0ad-data_0.0.23.1-1.1_all.deb /tmp/0ad-data-0.0.23
$ cd /tmp/0ad-data-0.0.23/
$ ls
DEBIAN usr
$ find
.
./DEBIAN
./DEBIAN/md5sums
./DEBIAN/control
./usr
./usr/share
./usr/share/doc
./usr/share/doc/0ad-data
./usr/share/doc/0ad-data/changelog.Debian.gz
./usr/share/doc/0ad-data/copyright
./usr/share/games
./usr/share/games/0ad
./usr/share/games/0ad/mods
./usr/share/games/0ad/mods/mod
./usr/share/games/0ad/mods/mod/mod.zip
./usr/share/games/0ad/mods/public
./usr/share/games/0ad/mods/public/public.zip
$ ls -l usr/share/games/0ad/mods/public/public.zip
-rw-r--r-- 1 dave dave 2057825096 Jan 1 2021
usr/share/games/0ad/mods/public/public.zip
$ ls -l /var/cache/apt/archives/0ad-data_0.0.23.1-1.1_all.deb
-rw-r--r-- 1 root root 701833824 Jan 1 2021
/var/cache/apt/archives/0ad-data_0.0.23.1-1.1_all.deb
$ md5sum /var/cache/apt/archives/0ad-data_0.0.23.1-1.1_all.deb
b2b6e5510898abf0eee79da48995f92f
/var/cache/apt/archives/0ad-data_0.0.23.1-1.1_all.deb
$ apt-cache show 0ad-data/bullseye | grep -i md5sum
MD5sum: b2b6e5510898abf0eee79da48995f92f
