Book Image

Red Hat Enterprise Linux 8 Essentials

By : Neil Smyth
1 (1)
Book Image

Red Hat Enterprise Linux 8 Essentials

1 (1)
By: Neil Smyth

Overview of this book

Red Hat Enterprise Linux 8 is one of the most secure and dependable operating systems available. For this reason, the ambitious system or network engineer will find a working knowledge of Red Hat Enterprise 8 to be an invaluable advantage in their respective fields. This book, now updated for RHEL 8.1, begins with a history of Red Enterprise Linux and its installation. You will be virtually perform remote system administration tasks with cockpit web interface and write shell scripts to maintain server-based systems without desktop installation. Then, you will set up a firewall system using a secure shell and enable remote access to Gnome desktop environment with virtual network computing (VNC). You’ll share files between the Red Hat Enterprise Linux 8 (RHEL 8) and Windows System using Samba client and NFS. You will also run multiple guest operating systems using virtualization and Linux containers, and host websites using RHEL 8 by installing an Apache web server. Finally, you will create logical disks using logical volume management and implement swap space to maintain the performance of a RHEL 8 system. By the end of this book, you will be armed with the skills and knowledge to install the RHEL 8 operating system and use it expertly.
Table of Contents (32 chapters)
32
Index

13.2 Checking firewalld Status

The firewalld service is installed and enabled by default on all RHEL 8 installations. The status of the service can be checked via the following command:

# systemctl status firewalld

 firewalld.service - firewalld - dynamic firewall daemon

   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)

   Active: active (running) since Thu 2019-02-14 14:24:31 EST; 3 days ago

     Docs: man:firewalld(1)

 Main PID: 816 (firewalld)

    Tasks: 2 (limit: 25026)

   Memory: 30.6M

   CGroup: /system.slice/firewalld.service

           816 /usr/libexec/platform-python -s /usr/sbin/firewalld --nofork --nopid

If necessary, the firewalld service may be installed as follows:

# dnf install firewalld

The firewalld service is enabled...