Here's my take on a 'install.sh' for fresh Raspberry Pi OS installations.

This comes with handy bash_aliases and a lightweight dynamic $PS1 bash prompt.

Known 'kind-of' Issue: Splash screen only shows a Raspberry on 32-bit Raspberry Pi OS

See also:

• .bash_aliases
• .bash_prompt

and

• update.sh
• rpi_backup.sh

• Copy install.sh to Raspberry Pi, log in and run ./install.sh