[mdlug] Interview Questions: runlevel and Memory, CPU use

[Gib]

I just had a job interview. A couple of the questions were things I had to
look up after.


Runlevel (I knew I used 1, 3 and 5 but I didn't remember the difference
between 3 and 5 was graphical X support):
https://www.liquidweb.com/kb/linux-runlevels-explained/

How to get memory and CPU information (I use top):
https://alvinalexander.com/linux-unix/linux-processor-cpu-memory-information-commands/

cat /proc/cpuinfo
cat /proc/meminfo