lsb_release

Imprime información especifica de la distribución

$ lsb_release -a
No LSB modules are available.
Distributor ID:	Debian
Description:	Debian GNU/Linux 9.6 (stretch)
Release:	9.6
Codename:	stretch

dmidecode

Imprime información de hardware

$ sudo dmidecode
 dmidecode 3.0
 Getting SMBIOS data from sysfs.
 SMBIOS 2.7 present.
 27 structures occupying 1263 bytes.
 Table at 0x000EBD50.
 Handle 0x0000, DMI type 0, 24 bytes
 ...
$ sudo dmidecode -t memory
dmidecode 3.0
 Getting SMBIOS data from sysfs.
 SMBIOS 2.7 present.
 Handle 0x000F, DMI type 16, 23 bytes
 Physical Memory Array
     Location: System Board Or Motherboard
     Use: System Memory
     Error Correction Type: None
     Maximum Capacity: 16 GB
     Error Information Handle: Not Provided
     Number Of Devices: 2
 ...

Tamañas de directorios

$ du --max-depth=1 -h | sort -h