My Jolla phone arrived last week and this is my firt experience with Sailfish OS and Linux on mobile in general. I am currently getting used to the gestures and setting everything up. I managed to activate the terminal by enabling dev mode (I think).
i noticed that rpm is installed but not dnf or yum so i was wondering how do you install CLI tools like htop or similar?
(i typed this on my jolla in the Voyager client from fdroid)

You should have pkcon and zypper: https://docs.sailfishos.org/Reference/Sailfish_OS_Cheat_Sheet/#package-handling
devel-su pkcon install htopdevel-su zypper in htopAlthough htop may not be in the default repos.