1. Check system version
cat /etc/issue
cat /etc/lsb-release
2. Check cpu
lscpu
3. Check the memory
free -m
4. Check the hard disk size
fdisk -l | grep Disk
5. Check disk usage
df -h
cat /etc/issue
cat /etc/lsb-release
lscpu
free -m
fdisk -l | grep Disk
df -h