bash: /usr/local/bin/aarch64-none-elf-gdb: cannot execute binary file: Exec format error

This error message means that the binary file `/usr/local/bin/aarch64-none-elf-gdb` cannot be executed because it is in the wrong format. This may happen if you are trying to execute a binary file that was compiled for a different architecture or operating system than the one you are currently using.

To resolve this issue, you can try recompiling the binary file for your current architecture or downloading a version of the binary file that is compatible with your system. You can also check that you are using the correct command to execute the binary file, as some commands may be specific to certain architectures or operating systems.