Change default ash to bash shell - nutthawit/alpine-dotfile GitHub Wiki
By default Alpine Linux uses Busybox Ash shell for its default shell. It is a standard POSIX shell derived from Debian Ash variant.
But I will use bash shell for smooth integration in future
doas apk add bash bash-completion
For who want to use other shell Read more
sss
Read more on https://unix.stackexchange.com
Change default shell by edit /etc/passwd manually using an editor of your choice. An example line for a user named tie is:
user:x:1000:1000:tie:/home/user:/bin/bash
Logout and login again