Utility
Verifying listening ports
nmap -sT -O localhost
Add user to sudoer list
sudo bash
adduser stack
Password : stack
echo "stack ALL=(ALL) NOPASSWD: ALL" » /etc/sudoers
exit
Change interface to onboot ip dhcp
Change ONBOOT=yes at /etc/sysconfig/network-scripts/ifcfg-enp0s3
Get ip address via script
echo `ifconfig eth0 2>/dev/null|awk '/inet addr:/ {print $2}'|sed 's/addr://'`
This will give you the IP address of eth0.