I’m not actually sure if:
ee stack install --utils
…actually installs phpMyAdmin. I’d have to check into that a little further.
However, I do know that:
ee stack install --admin
…and…
ee stack install --phpmyadmin
…both install the phpMyAdmin packages.
If you haven’t installed phpMyAdmin, using one of the last two commands, then phpMyAdmin, may not be installed.
However, I’m a little curious about the installation process you went through. After you ran:
wget -qO ee rt.cx/ee && sudo bash ee
…and before you ran:
ee site create relaxtime.gr --wp
…did you not run:
ee stack install --all
…or…
ee stack install --web
???