You need to use the pkg_add command to install BASH package which is available in a binary packages format over the Internet. You can also install bash package using OpenBSD CD.
First, Login as a root user, either use su - or sudo command.
Next setup PKG_PATH using export command. You can make things really easy by using the PKG_PATH environment variable. Just point it to your favorite location, and pkg_add(1) will automatically look there for any package you specify, and also fetch and install the necessary dependencies of this package automatically.
$ export PKG_PATH=ftp://mirror.planetunix.net/pub/OpenBSD/`uname -r`/packages/`machine -a`/
Caution: The PKG_PATH variable MUST end in a slash (/).
OpenBSD Install bash shell binary package
Use pkg_add command as follows:
$ sudo pkg_add -i -v bash
# pkg_add -i -v bash
parsing bash-3.2 Dependencies for bash-3.2 resolve to: gettext-0.14.6, libiconv-1.9.2p3 (todo: libiconv-1.9.2p3,gettext-0.14.6) bash-3.2:parsing libiconv-1.9.2p3 bash-3.2:libiconv-1.9.2p3: complete bash-3.2:parsing gettext-0.14.6 Dependencies for gettext-0.14.6 resolve to: expat-2.0.0, libiconv-1.9.2p3 (todo: expat-2.0.0) bash-3.2:parsing expat-2.0.0 bash-3.2:expat-2.0.0: complete bash-3.2:gettext-0.14.6: complete Shell /usr/local/bin/bash appended to /etc/shells bash-3.2: complete
To use bash shell, just enter bash command:
How do I setup bash as a login and default shell for my account?
Type the following command to change the user's shell to new shell called /usr/local/bin/bash (the following will change root shell to bash):
# chsh -s /usr/local/bin/bash
Set bash shell as a default login shell for user nixcraft:
# chsh -s /usr/local/bin/bash nixcraft