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Tecmint

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Tecmint - Linux Howtos, Tutorials, Guides, News, Tips and Tricks.
Updated: 7 hours 58 min ago

How to Install Apache ActiveMQ on CentOS/RHEL 8

Wednesday 9th of October 2019 06:56:10 AM
ActiveMQ is a popular, open-source, multi-protocol implementation of message-oriented middleware (MOM) with enterprise features written in Java, used to send messages between two applications, or two components inside an application. It supports a wide...

How to Install Fail2Ban to Protect SSH on CentOS/RHEL 8

Tuesday 8th of October 2019 06:54:58 AM
Fail2ban is a free, open-source and widely used intrusion prevention tool that scans log files for IP addresses that show malicious signs such as too many password failures, and much more, and it bans...

Understand Core Components of Ansible – Part 1

Monday 7th of October 2019 07:34:36 AM
The Red Hat Certified Specialist in Ansible Automation exam (EX407) is a new certification program by Red Hat that tests your skills to use Ansible to automate the configuration of systems and applications. The...

How to Install Java 13 on CentOS/RHEL 7/8 & Fedora 30/31

Friday 4th of October 2019 08:05:25 AM
Java is a secure, stable, and well known, general-purpose programming language and computing technology platform with many interconnected capabilities. To run Java-based applications, you must have Java installed on your server. You mostly need...

Setup a Centralized Log Server with Rsyslog in CentOS/RHEL 8

Thursday 3rd of October 2019 08:12:03 AM
In order for a system administrators to recognize or analyze problems on a CentOS 8 or RHEL 8 server, it is important to know and view the events that occurred on the server in...

Linux ‘tree Command’ Usage Examples for Beginners

Wednesday 2nd of October 2019 09:55:41 AM
The tree is a tiny, cross-platform command-line program used to recursively list or display the content of a directory in a tree-like format. It outputs the directory paths and files in each sub-directory and...

How to Install MongoDB 4 on Debian 10

Tuesday 1st of October 2019 07:33:37 AM
MongoDB is an opensource, cross-platform NoSQL database server that developed by MongoDB Inc. It uses JSON to store its data and is popular for handling large amounts of data due to its scalability, high...

How to Install Ansible Automation Tool on CentOS/RHEL 8

Monday 30th of September 2019 07:18:08 AM
Ansible is a free and opensource automation tool that allows system administrators to configure and control hundreds of nodes from a central server without the need of installing any agents on the nodes. It...

Installation of “CentOS 8.0″ with Screenshots

Friday 27th of September 2019 07:38:22 AM
CentOS 8 has finally been released! The new version, which is a community version of RHEL 8, ships with new and exciting features which promise an enhanced user experience. Installing CentOS 8 is pretty...

Initial Server Setup with CentOS/RHEL 8

Thursday 26th of September 2019 10:39:10 AM
In this article, we will walk you through the first basic steps that you need to apply after installing a minimal CentOS/RHEL 8 server with no graphical environment in order to retrieve the information...

CentOS 8 Released – Download DVD ISO Images

Wednesday 25th of September 2019 09:57:51 AM
CentOS is a free and open-source, community-driven Linux distribution based on the popular security-focused Red Hat Enterprise Linux. It was designed to be consistent rolling-release distro joined with Red Hat but still independent from...

How to Set Filesystem (Disk) Quotas on Ubuntu

Monday 23rd of September 2019 07:36:08 AM
Filesystem quota is a standard built-in feature found in Linux Kernel. Quotas determine the amount of space a file should have to support user activities. The disk quotas also limit the number of files...

How to Install the Latest MySQL 8 on Debian 10

Friday 20th of September 2019 08:08:50 AM
MySQL is the most widely used open-source database management system used to keep and retrieve data for a broad variety of famous applications. In Debian 10, MariaDB comes with by default as a drop-in...

12 ss Command Examples to Monitor Network Connections

Thursday 19th of September 2019 05:45:19 AM
ss command is a tool that is used for displaying network socket related information on a Linux system. The tool displays more detailed information that the netstat command which is used for displaying active...

How to Install Apache Tomcat in RHEL 8

Wednesday 18th of September 2019 08:18:12 AM
Apache Tomcat is an open-source, lightweight, powerful and widely-used web server developed and maintained by Apache Foundation. It is an implementation of the Java Servlet, JavaServer Pages (JSP), Java Expression Language (EL) and Java...

How to Setup MySQL Master-Slave Replication on RHEL 8

Tuesday 17th of September 2019 06:17:31 AM
MySQL Replication is a process where data from one server is automatically copied or replicated onto another backup server in real time. Replication provides redundancy and fault tolerance and gives the user peace of...

How to Recover Deleted Files Using TestDisk in Linux

Friday 13th of September 2019 05:46:17 AM
We all know the feeling of looking for a file and not finding it, even in the trash. The trauma that comes with file and data loss should end thanks to the TestDisk –...

How to Install Zabbix on Debian 10

Thursday 12th of September 2019 06:14:00 AM
Zabbix is a free, open-source, popular and feature-rich IT infrastructure monitoring software developed using PHP language. It is used to monitor networks, servers, applications, services as well as cloud resources. It also supports monitoring...

How to Install Java on RHEL 8

Wednesday 11th of September 2019 05:39:16 AM
Java is a fast, secure, reliable, and popular, general-purpose programming language and computing platform. Java is more than just a language, it is a technology platform with many interconnected capabilities. To run Java-based applications...

How to Install and Use TestDisk Data Recovery Tool in Linux

Tuesday 10th of September 2019 06:01:44 AM
TestDisk is a free and opensource, command-line data recovery tool that is used to recover data from deleted or lost partitions. Further, you can use it to revive non-bootable partitions which can be caused...

More in Tux Machines

FOSS in SaaS/Back End/Databases

  • What to expect from Scylla Summit 2019

    Scylla (the company) takes its name directly from Scylla [pronounced: sill-la], a Greek god sea monster whose mission was to haunt and torment the rocks of a narrow strait of water opposite the Charybdis whirlpool. Outside of Greek history, Scylla is an open source essentially distributed NoSQL data store that uses a sharded design on each node, meaning each CPU core handles a different subset of data.

  • Licence to grill: A year on, MongoDB's Eliot Horowitz talks to The Reg about SSPL

    A year after its controversial switch to the Server Side Public License (SSPL), and with new products livening up the summer, MongoDB remains unrepentant. The change was aimed at making vendors selling a service using the company's code share the source of applications used to run the service as well as any tweaks. The move appeared to be aimed squarely at cloud vendors, content to "capture all the value and give nothing back to the community," as Dev Ittycheria, CEO of MongoDB, told us at the time. Elements of the open source community were less than impressed. The Open Source Initiative (OSI) rejected the company's attempts to get the licence approved and eventually MongoDB withdrew the thing from the process, although the company continued to use it for its own products. Indeed, at MongoDB's London .Local event, where we met co-founder and CTO Eliot Horowitz, the company was trumpeting the opening up of its Compass GUI for MongoDB under the SSPL.

  • From Russia with OLAP: Percona uses ClickHouse analytics

    At Percona Live Europe last week, one such example came up around the open source scene that is developing in Russia and how one of the projects that is now starting to open up to international use.

  • The love and the lament: Percona CEO details state of open source data

    Open source has changed, obviously it has. Starting from its origins among the hobbyist programmers and hackers who dared to defy the proprietary Silicon Valley behemoths, the open community-centric model for software development has now been widely adopted by the commercial software sector. In many cases, open source has become the norm for modern platforms, tools and applications. But how has this affected the nature of open development and what impact has this shift left in its wake on the data landscape that we view today?

  • GraphDB 9.0 Open Sources Its Front End and Engine Plugins to Support Knowledge Graph Solutions

    Ontotext has announced GraphDB 9.0, which is aimed at lowering the effort required for development and continuous operation of knowledge graphs by opening multiple integration extension points for its users and developers. GraphDB is a database for managing semantic information with more than 30 large production installations in big enterprises. With the growing complexity of enterprise data integration, many organizations are starting the journey of building knowledge graphs.

  • Ververica Announces Open Source Framework to Enable Lightweight, Stateful Applications at Scale

    Ververica, the original creators of Apache Flink, today announced at Flink Forward Europe the launch of Stateful Functions (statefun.io), an open source framework that reduces the complexity of building and orchestrating stateful applications at scale. Stateful Functions enables users to define loosely coupled, independent functions with a low footprint that can interact consistently and reliably in a shared pool of resources. Ververica will propose the project, licensed under Apache 2.0, to the Apache Flink community as an open source contribution.

  • DataStax offers bidirectional data dexterity for Apache Kafka

    DataStax has opened up ‘early access’ to its DataStax Change Data Capture (CDC) Connector for Apache Kafka, the open source stream-processing (where applications can use multiple computational units, similar to parallel processing) software platform. As a company, DataStax offers a commercially supported ‘enterprise-robust’ database built on open source Apache Cassandra. Stream processing is all about speed and cadence, so, the DataStax CDC Connector for Apache Kafka gives developers ‘bidirectional data movement’ between DataStax, Cassandra and Kafka clusters.

Security: WireGuard, SafeBreach and More

  • WireGuard Snapshot `0.0.20191012` Available
    -----BEGIN PGP SIGNED MESSAGE-----
    Hash: SHA256
    
    Hello,
    
    A new snapshot, `0.0.20191012`, has been tagged in the git repository.
    
    Please note that this snapshot is a snapshot rather than a final
    release that is considered secure and bug-free. WireGuard is generally
    thought to be fairly stable, and most likely will not crash your
    computer (though it may).  However, as this is a snapshot, it comes
    with no guarantees; it is not applicable for CVEs.
    
    With all that said, if you'd like to test this snapshot out, there are a
    few relevant changes.
    
    == Changes ==
    
      * qemu: bump default version
      * netns: add test for failing 5.3 FIB changes
      
      Kernels 5.3.0 - 5.3.3 crash (and are probably exploitable) via this one liner:
      
      unshare -rUn sh -c 'ip link add dummy1 type dummy && ip link set dummy1 up && ip -6 route add default dev dummy1 && ip -6 rule add table main suppress_prefixlength 0 && ping -f 1234::1'
      
      We fixed this upstream here:
      
      https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=ca7a03c4175366a92cee0ccc4fec0038c3266e26
      
      This is relevant to WireGuard because a very similar sequence of commands is
      used by wg-quick(8).
      
      So, we've now added some tests to catch this code path in the future. While
      the bug here was a random old use-after-free, the test checks the general
      policy routing setup used by wg-quick(8), so that we make sure this continues
      to work with future kernels.
      
      * noise: recompare stamps after taking write lock
      
      We now recompare counters while holding a write lock.
      
      * netlink: allow preventing creation of new peers when updating
      
      This is a small enhancement for wg-dynamic, so that we can update peers
      without readding them if they've already been removed.
      
      * wg-quick: android: use Binder for setting DNS on Android 10
      
      wg-quick(8) for Android now supports Android 10 (Q). We'll be releasing a new
      version of the app for this later today.
    
    This snapshot contains commits from: Jason A. Donenfeld and Nicolas Douma.
    
    As always, the source is available at https://git.zx2c4.com/WireGuard/ and
    information about the project is available at https://www.wireguard.com/ .
    
    This snapshot is available in compressed tarball form here:
      https://git.zx2c4.com/WireGuard/snapshot/WireGuard-0.0.20191012.tar.xz
      SHA2-256: 93573193c9c1c22fde31eb1729ad428ca39da77a603a3d81561a9816ccecfa8e
      BLAKE2b-256: d7979c453201b9fb6b1ad12092515b27ea6899397637a34f46e74b52b36ddf56
    
    A PGP signature of that file decompressed is available here:
      https://git.zx2c4.com/WireGuard/snapshot/WireGuard-0.0.20191012.tar.asc
      Signing key: AB9942E6D4A4CFC3412620A749FC7012A5DE03AE
    
    If you're a snapshot package maintainer, please bump your package version. If
    you're a user, the WireGuard team welcomes any and all feedback on this latest
    snapshot.
    
    Finally, WireGuard development thrives on donations. By popular demand, we
    have a webpage for this: https://www.wireguard.com/donations/
    
    Thank you,
    Jason Donenfeld
    
  • WireGuard 0.0.20191012 Released With Latest Fixes

    WireGuard is still working on transitioning to the Linux kernel's existing crypto API as a faster approach to finally make it into the mainline kernel, but for those using the out-of-tree WireGuard secure VPN tunnel support, a new development release is available.

  • SafeBreach catches vulnerability in controversial HP Touchpoint Analytics software

    Now the feature is embroiled in another minor controversy after security researchers at SafeBreach said they uncovered a new vulnerability. HP Touchpoint Analytics comes preinstalled on many HP devices that run Windows. Every version below 4.1.4.2827 is affected by what SafeBreach found. In a blog post, SafeBreach Labs security researcher Peleg Hadar said that because the service is executed as "NT AUTHORITY\SYSTEM," it is afforded extremely powerful permissions that give it wide access. "The CVE-2019-6333 vulnerability gives attackers the ability to load and execute malicious payloads using a signed service. This ability might be abused by an attacker for different purposes such as execution and evasion, for example: Application Whitelisting Bypass Signature Validation Bypassing," Hadar wrote. [...] The company has long had to defend HP Touchpoint Analytics against critics who say it gives HP unnecessary access to users' systems. When it first became widely noticed in 2017, dozens of users complained that they had not consented to adding the system.

  • Security Tool Sprawl Reaches Tipping Point
  • How trusted digital certificates complement open source security

    Application developers incorporating open source software into their designs may only discover later that elements of this software have left them (and their customers) exposed to cyber-attacks.

  • Securing the Container Supply Chain

FOSS in Finance/Currency Leftovers

Programming Leftovers

  • Xilinx unveils open source FPGA platform

    The Vitis unified software platform from FPGA vendor Xilinx is the result of five-year project to create software development tools using familiar languages like C++ and Python to develop a wide range of applications for its reprogrammable chip.

  • Listen: How ActiveState is tackling “dependency hell” by providing enterprise-level support for open source programming languages [Podcast]

    “Open source back in the late nineties – and even throughout the 2000s – was really hard to use,” ActiveState CEO Bart Copeland says. “Our job,” he continues, “was to make it much easier for developers to use open source and much easier for enterprises to use open source.”

  • 10 open source projects proving the power of Google Go

    Now 10 years in the wild, Google’s Go programming language has certainly made a name for itself. Lightweight and quick to compile, Go has stirred significant interest due to its generous libraries and abstractions that ease the development of concurrent and distributed (read: cloud) applications. But the true measure of success of any programming language is the projects that developers create with it. Go has proven itself as a first choice for fast development of network services, software infrastructure projects, and compact and powerful tools of all kinds.

  • The Eclipse Foundation Launches The Eclipse Cloud Development Tools Working Group for Cloud Native Software

    The Eclipse Foundation today announced the launch of the Eclipse Cloud Development Tools Working Group (ECD WG), a vendor-neutral open source collaboration that will focus on development tools for and in the cloud. The ECD WG will drive the evolution and broad adoption of emerging standards for cloud-based developer tools, including language support, extensions, marketplaces, and developer workspace definition. Founding members of the ECD WG include Broadcom, EclipseSource, Ericsson, IBM, Intel, Red Hat, SAP, Software AG, and Typefox among many others.

  • You cannot cURL under pressure

    With cURL having this many features (with the general mass of them being totally unknown to me, let alone how you use them) got me thinking… What if you could do a game show style challenge for them?

  • Follow-up on ‘ASCII Transliteration without ICU or iconv’

    By an anonymous commenter, I got pointed to that Unicode (in Qt) is slightly more complicated than I had considered when writing the code: I missed to handle planes beyond the Basic Multilingual Plane (BMP) and the ‘surrogates’ between code points 0xD800 and 0xDFFF. In a series of recently pushed Git commits I addressed problem of surrogates and fixed some more issues. Some preparatory work has been done to support more planes in the future, but as of now, only the BMP is supported. For details, please have a look at the five commits posted on 2019-10-12.