 cd /proc
  805  less meminfo
  806  less cpuinfo
  807  top
  808  free
  809  free -h
  810  df
  811  df -ht
  812  df -ht ext4
  813  apt update
  814  sudo apt update
  815  sudo apt install iftop
  816  ip addr
  817  iftop -i enp0s3
  818  sudo iftop -i enp0s3
