Linux Hardware Info
Some tips on finding out the hardware and OS version
From Linux Commands - A practical reference:

Show kernel version and system architecture

uname -a

Show if it is 64 bit

uname -m

Show name and version of distribution

head -n1 /etc/issue

Show all partitions registered on the system

cat /proc/partitions

Show RAM total seen by the system

grep MemTotal /proc/meminfo

Show CPU(s) info

grep "model name" /proc/cpuinfo

Show info about disk sda

hdparm -i /dev/sda

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