Problem using MacPorts bash in MacOS Terminal

[Bjarne D Mathiesen]

What I'm doing -when installing MacPorts- is the following:

declare prefix='/opt/local'

# setup the system paths
mkdir -p  /etc/paths.d
cp    -np /etc/paths /etc/paths.orig
mv    -n  /etc/paths /etc/paths.d/999macosx
touch     /etc/paths
echo "${prefix}/bin"   >  /etc/paths
echo "${prefix}/sbin"  >> /etc/paths

# let's get MacPorts bash & zsh
${prefix}/bin/port -N install bash  \
&& echo "${prefix}/bin/bash" >> /etc/shells
${prefix}/bin/port -N install zsh   \
&& echo "${prefix}/bin/zsh"  >> /etc/shells

Regarding setting MacPorts bash as the default shell for a user, I'm
doing it in System Settings -> Users & Groups
When you [ctrl][click] on a user name, you get an "Advanced settings"
pop-up. In there, you can set the default shell for Terminal.
I'm !not! doing this for admin accounts - only "normal" users.
For admin accounts, I'm either doing "bash" -or- "sudo bash" in a
Terminal window

-- 
Bjarne D Mathiesen
Slagelse ; Danmark ; Europa
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denne besked er skrevet i et totalt M$-frit miljø
MacPro 2010 ; OpenCore + macOS 14.7 Sonoma
2 x 3,46 GHz 6-Core Intel Xeon ; 192 GB 1333 MHz DDR3 ECC RDIMM
ATI Radeon RX 590 8 GB