I finally have found the command to show a fancy system/hardware report, it uses the screenfetch utility

This is my output from the hypnotoad, my Thinkpad x230

         _,met$$$$$gg.           edoput@hypnotoad
      ,g$$$$$$$$$$$$$$$P.        OS: Debian 9.0 stretch
    ,g$$P""       """Y$$.".      Kernel: x86_64 Linux 4.9.0-3-amd64
   ,$$P'              `$$$.      Uptime: 11h 6m
  ',$$P       ,ggs.     `$$b:    Packages: 2693
  `d$$'     ,$P"'   .    $$$     Shell: bash 4.4.12
   $$P      d$'     ,    $$P     Resolution: 1366x768
   $$:      $$.   -    ,d$$'     DE: Gnome 
   $$\;      Y$b._   _,d$P'      WM: GNOME Shell
   Y$$.    `.`"Y$$$$P"'          WM Theme: Adwaita
   `$$b      "-.__               GTK Theme: Adwaita [GTK2/3]
    `Y$$                         Icon Theme: gnome
     `Y$$.                       Font: Cantarell 11
       `$$b.                     CPU: Intel Core i5-3320M CPU @ 3.3GHz
         `Y$$b.                  GPU: Mesa DRI Intel(R) Ivybridge Mobile 
            `"Y$b._              RAM: 2134MiB / 7687MiB
                `""""

And this is from bender my custom built

         _,met$$$$$gg.           edoput@bender
      ,g$$$$$$$$$$$$$$$P.        OS: Debian 9.0 stretch
    ,g$$P""       """Y$$.".      Kernel: x86_64 Linux 4.9.0-3-amd64
   ,$$P'              `$$$.      Uptime: 1h 30m
  ',$$P       ,ggs.     `$$b:    Packages: 2671
  `d$$'     ,$P"'   .    $$$     Shell: bash 4.4.12
   $$P      d$'     ,    $$P     Resolution: 1920x1080
   $$:      $$.   -    ,d$$'     DE: Gnome 
   $$\;      Y$b._   _,d$P'      WM: GNOME Shell
   Y$$.    `.`"Y$$$$P"'          WM Theme: Adwaita
   `$$b      "-.__               GTK Theme: Adwaita [GTK2/3]
    `Y$$                         Icon Theme: Adwaita
     `Y$$.                       Font: Cantarell 11
       `$$b.                     CPU: Intel Core i5-3470 CPU @ 3.6GHz
         `Y$$b.                  GPU: GeForce GTX 660/PCIe/SSE2
            `"Y$b._              RAM: 1937MiB / 7928MiB
                `""""

I have always seend this kind of output in screenshots about linux desktops and I got curious because it wouldn’t be mentioned how to make them