Linux Process Is Listening Upon a Port 1) netstat command or ss command – a command-line tool that displays network connections, routing tables, and a number of network interface statistics. 2) fuser command – a command line tool to identify processes using files or sockets. 3) lsof command – a command line tool to list […]

Oracle Linux Virtualization Manager OLVM (Need 2 Server and 1 Manager VM) https://docs.oracle.com/en/virtualization/oracle-linux-virtualization-manager/getstart/preface.html#preface Introduction Virtualization made a significant change in the IT (Information Technology) industry. This technology helped many organizations to use server resources efficiently. Server virtualization revolutionized data center management and helped organizations cut the fat out of the IT infrastructure. This was a […]

1) Basic Setup a) change default root password to hard one #passwd root b) create user # adduser sabin # passwd sabin ip address yum update yum wget http://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm yum install  yum-utils traceroute bind-utils fail2ban net-tools nmap telnet links chrony epel-release-latest-7 -y yum install -y https://yum.oracle.com/repo/OracleLinux/OL7/latest/x86_64/getPackage/oracle-database-preinstall-19c-1.0-1.el7.x86_64.rpm systemctl enable chronyd systemctl disable postfix hwclock date timedatectl […]