Check cpu info
adb shell cat /proc/cpuinfo
adb root
adb shell
Pm is package manager
pm -l | grep "app that you're looking for"
PS is process status, it is similar to task manager in window:
ps -A | grep "something"
Another way to find an app is to look at logcat To clear logcat
logcat -c
https://developer.android.com/studio/command-line/logcat logcat
Personally, I prefer the logcat method although it takes more time.
AM is Activity manager
am start package/.something