Mine

# my example /opt/etc/profile

echo
echo Welcome $USER.
echo Your homedir: $HOME.
echo Current shell: $SHELL.
echo

PS1="\u@:\w/> "

if [ "$SHELL" = '/bin/sh' ]
then PS1="$ "
fi

export PS1
export TERM='linux'
export PATH=/opt/sbin:/opt/bin/:$PATH