RHEL/CentOS is good server OS, but sometimes it's too Enterprise and needs some usability tuning. I wrote instruction for myself and apply it to all stand-alone servers I manage.

Here it is:

Whoami && whereami

# cpu:
cat /proc/cpuinfo
# disks:
df -h
sudo /sbin/fdisk -l
/usr/sbin/vgdisplay
/usr/sbin/lvdisplay
sudo /sbin/hdparm -tT /dev/sda
# devices:
sudo /sbin/lsusb
sudo /sbin/lspci
# memory
vmstat

Creating user

Do not use root account for many reasons.

Login as root: