Update notes in Ubuntu installation instructions

[Benluv]

Clarify note about binary download options and asset names.

Please change the assets in https://github.com/ros2/ros2/releases instead

Description

Added a note detailing that the amd64 and arm64 binary assets for the linux noble ros2 jazzy are switched

Fixes (issue #1779 in the ros2/ros2 repo)

Did you use Generative AI?

No

Additional Information

Please change the assets in https://github.com/ros2/ros2/releases instead

[fujitatomoya]

@Benluv thanks for pointing this out. this is true, something went wrong for release process, the released binaries are switched in different platform architecture.

# amd64 released binaries are actually aarch64 architecture
tomoyafujita@~/DVT/work/amd64 >curl -LO https://github.com/ros2/ros2/releases/download/release-jazzy-20250820/ros2-jazzy-20250820-linux-noble-amd64.tar.bz2
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100  723M  100  723M    0     0  45.1M      0  0:00:16  0:00:16 --:--:-- 32.6M

tomoyafujita@~/DVT/work/amd64 >tar -xjf ros2-jazzy-20250820-linux-noble-amd64.tar.bz2

tomoyafujita@~/DVT/work/amd64 >cd ros2-linux/lib/demo_nodes_cpp

tomoyafujita@~/DVT/work/amd64/ros2-linux/lib/demo_nodes_cpp >file talker
talker: ELF 64-bit LSB pie executable, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-aarch64.so.1, BuildID[sha1]=3bb68bb186d4ecb2e5a1609f104652f6d5f5590e, for GNU/Linux 3.7.0, with debug_info, not stripped

# aarch64 released binaries are amd64 actually architecture
tomoyafujita@~/DVT/work/arm64 >curl -LO https://github.com/ros2/ros2/releases/download/release-jazzy-20250820/ros2-jazzy-20250820-linux-noble-arm64.tar.bz2
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100  742M  100  742M    0     0  11.3M      0  0:01:05  0:01:05 --:--:-- 10.1M

tomoyafujita@~/DVT/work/arm64 >tar -xjf ros2-jazzy-20250820-linux-noble-arm64.tar.bz2

tomoyafujita@~/DVT/work/arm64 >cd ros2-linux/lib/demo_nodes_cpp

tomoyafujita@~/DVT/work/arm64/ros2-linux/lib/demo_nodes_cpp >file talker
talker: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=04b7b81d56786b3769cd7c22923662cc4e351ed6, for GNU/Linux 3.2.0, with debug_info, not stripped

[fujitatomoya]

Please change the assets in https://github.com/ros2/ros2/releases instead

i think this is the way to fix this.

[mjcarroll]

Yes, we have already pinged @marcoag to switch the binaries. Thanks for reporting!