Commands and codesCodePre offers a wide variety of tutorials on the topic Ubuntu.
Firewalld is the default firewall on Centos 7 and Centos 8, as well as RHEL 7 and RHEL 8. To start using iptables on Centos, you need to disable firewalld to avoid conflicts in firewall rules. Stop firewalld and remove it from startup $ sudo systemctl stop firewalld $ sudo systemctl disable firewalld We mask… read more »
netcat – a Unix utility that allows you to establish TCP and UDP connections, receive data from there and transmit them. Despite its usefulness and simplicity, this utility is not included in any standard. To check the availability of TCP / UDP ports on a remote machine, we will use the Netcat utility Installation: ###… read more »
cfdisk – a system utility for managing hard disk partitions in the Linux operating system. Similar to fdisk, but with a friendly user interface Objective: you need to increase the size of the GPT disk / dev / sdb1 (file system type ext4) Turn off the virtual machine, We expand the required disk, Turn on… read more »
An SSH tunnel is a tunnel created over an SSH connection and used to encrypt tunneled data. Used to secure data transmission on the Internet. Tunnel setup Launch Putty / Kitty In the Host Name field, enter the IP address of the server to which we will connect, in the Port field, enter the ssh… read more »
EFI partition – Required for GPT partitioning on UEFI systems. The standard size of an EFI partition is 100MB, but on 4K Native extended format disks (4KB sectors) it is increased to 260MB. The standard “Disk Management” utility in Windows cannot delete EFI-encrypted volumes. But the operating system has a console utility called Diskpart. Run… read more »
[*]Introduction Java and JVM (Java Virtual Machine) are required for many kinds of software, including Tomcat, Jetty, Glassfish, Cassandra, and Jenkins. In this tutorial, you will install various versions of the Java Runtime Environment (JRE) and Java Developer Kit (JDK) using apt. You will also be installing OpenJDK, and the official packages from Oracle. Then… read more »
In this article, we will explain how to install Joomla on Ubuntu 16.04 with MariaDB 10.2, PHP-FPM 7.1 and Nginx. Joomla is an open source content management system (CMS) for publishing web content written in PHP. Joomla is one of the most popular CMS and is used worldwide to power millions of websites of all… read more »
This guide will help you identify the package that owns / provides a particular file on your Ubuntu system. All commands in this article have been tested on Ubuntu 18.04 and Ubuntu 16.04 Desktop and Server edition. Sometimes it is necessary to know the package that adds files to your system, usually this is important… read more »
In this article, we will show you how to install, configure and use OpenSSH on Ubuntu 16.04. SSH (Secure Shell) is a protocol that allows reliable access to a remote machine while OpenSSH is a set of tools based on the SSH protocol. Today we are going to show you how to install and configure… read more »
OwnCloud is a popular web application used for data synchronization and file sharing. It allows users to easily manage their files, contacts, calendars, to-do lists and more, making it a great alternative to the popular Google Drive, Dropbox, iCloud and other cloud platforms. OwnCloud is cross-platform and supports all popular operating systems, but this article… read more »