CentOS / RHEL 7 : How to Install GUI

For new installation of RHEL 7 ,GUI doesn’t come with default installation. If you do not click on the “Software Selection” link and pick “server with GUI” then there will be no GUI after reboot, only “Base Environment ” will be installed. To enable GUI after system installation, you can use following method. Installing the […]

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CentOS / RHEL 7 : Beginners guide to systemd service units

Previous versions of Oracle Linux use init scripts located in the /etc/rc.d/init directory to start and stop services. In RHEL 7, these init scripts have been replaced with systemd service units. Service units have a .service extension. Use the systemctl command to list all loaded service units: # systemctl list-units –type service –all UNIT LOAD […]

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CentOS / RHEL 7 : Beginners guide to firewalld

Introduction – A packet filtering firewall reads incoming network packets and filters (allows or denies) each data packet based on the header information in the packet. The Linux kernel has built-in packet filtering functionality called Netfilter. – Two services are available in RHEL 7 to create, maintain, and display the rules stored by Netfilter: 1. […]

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CentOS / RHEL 7 : Configuring an NFS server and NFS client

NFS allows a linux server to share directories with other UNIX clients over network. NFS server exports a directory and NFS client mounts this directory. RHEL 7 supports two version of NFS – NFSv3 and NFSv4. NFS server and RPC processes starting the nfs-server process starts the NFS server and other RPC processes. RPC processes […]

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