Best way to find os name and version in Unix/Linux platform

Question

I need to find the OS name and version on Unix/Linux platform. For this I tried following:

1. lsb_release utility

2. /etc/redha

Answer 1

I prepared following commands to find concise information about a Linux system:

clear
echo "\n----------OS Information------------"
hostnamectl | grep "Static hostname:"
hostnamectl | tail -n 3
echo "\n----------Memory Information------------"
cat /proc/meminfo | grep MemTotal
echo "\n----------CPU Information------------"
echo -n "Number of core(s): "
cat /proc/cpuinfo | grep "processor" | wc -l
cat /proc/cpuinfo | grep "model name" | head -n 1
echo "\n----------Disk Information------------"
echo -n "Total Size: "
df -h --total | tail -n 1| awk '{print $2}'
echo -n "Used: "
df -h --total | tail -n 1| awk '{print $3}'
echo -n "Available: "
df -h --total | tail -n 1| awk '{print $4}'
echo "\n-------------------------------------\n"

Copy and paste in an sh file like info.sh and then run it using command sh info.sh