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Linux Basics: How to Create an Apache SSL Certificate on Ubuntu

Linux Basics: How to Create an Apache SSL Certificate on Ubuntu

The following steps outline the process of creating an Apache SSL certificate on Ubuntu. Important to Note: 1. Users must note that it is essential to have access to root privileges on the VPS before executing the task (as explained in steps 3 and 4).

How to Add a Swap File On Ubuntu

How to Add a Swap File On Ubuntu Linux

A swap file enables an operating system (OS) to utilize hard disk space to simulate additional memory. Effectively, as the system goes on the low-memory mode, it swaps a certain section of the RAM that an idle program may be using onto the hard disk to release memory capacity for other vital programs. Subsequently, when the user returns to the swapped out program, it swaps places with another program in RAM. This intelligent mix of RAM and swap files is commonly referred to as virtual memory, and its use allows the system to run a far greater number of programs than possible using only the built-in RAM.

Linux Basics: How To Create and Install SSH Keys on the Shell

Linux Basics: How To Create and Install SSH Keys on the Shell

SSH keys offer a highly secure manner of logging into a server with SSH as against mere dependence on a password. While a password stands the risk of being finally cracked, SSH keys are rather impossible to decipher using brute force. As a matter of fact, generating a key pair offers users two lengthy strings of characters corresponding to a public as well as a private key. Users can, thus, place the public key on any server, and subsequently unlock the same by connecting to it with a client that already possesses the private key. Upon matching up of the two keys, the system unlocks without any irksome dependence on a password. The security may be further smartly firewalled by guarding the private key with a passphrase.

How To Install The Latest Git On Ubuntu 14.04

How To Install The Latest Git On Ubuntu 14.04

This tutorial explains the process of installing Git on Ubuntu 14.04. For the uninitiated, Git, the client for the immensely popular GitHub, is a commonly used open source distributed version control system that was originally developed by Linus Torvalds with the objective of supporting Linux Kernel development.

PHP number_format() and a problem with negative values rounded to zero

PHP number_format() and a problem with negative values rounded to Zero

As is known, the PHP function number_format() rounds the given value to the needed amount of decimal places.

Securing SSH On Redhat/Centos With WiKID Two-Factor Authentication

Securing SSH On Ubuntu With WiKID Two-Factor Authentication

SSH offers a highly secure channel for remote administration of servers. However, if you face an audit for regulatory or business requirements, such as Visa/Mastercard PCI, you need to be aware of some potential authentication related short-comings that may cause headaches in an audit.

How to find outdated joomla versions on your server to reduce the risk of being hacked

Today I want to focus on a topic that can lead to huge problems of hacked accounts, spam mailings etc.: Outdated Joomla installations on your server.

Of course, this is valid for other software, too. The mentioned method should work in a similar way for other software. Since Joomla is widely spread throughout the internet, especially on shared hosting systems CMS (Content Management System), this howto will only cover Joomla so far.

How To Set Up Multi-Master Replication Using Tungsten And MySQL-Proxy For MySQL High Availability On Ubuntu 10.04.3 LTS

How To Set Up Multi-Master Replication Using Tungsten And MySQL-Proxy For MySQL High Availability On Ubuntu 10.04.3 LTS

This tutorial is based on my experience setting up Tungsten Replicator and MySQL-Proxy for a client's production setup.

Ubuntu 11.10 + saslauthd: SASL PLAIN authentication failed: no mechanism available

Error: Ubuntu 11.10 + saslauthd: SASL PLAIN authentication failed: no mechanism available

You have installed Postfix with saslauthd on Ubuntu 11.10 and get the following error in /var/log/mail.log when you try to send an email:

server1 postfix/smtpd[7868]: warning: unknown[1.2.3.4]: SASL PLAIN authentication failed: no mechanism available

Fedora 15 - Error: Package: glibc-2.14-5.i686 (updates) Requires: glibc-common = 2.14-5

Error: Fedora 15 - Error: Package: glibc-2.14-5.i686 (updates) Requires: glibc-common = 2.14-5

You get an error like the following one on Fedora 15:

Error: Package: glibc-2.14-5.i686 (updates)
Requires: glibc-common = 2.14-5
Installed: glibc-common-2.14-7.x86_64 (@updates-testing)
glibc-common = 2.14-7
Available: glibc-common-2.13.90-9.x86_64 (fedora)
glibc-common = 2.13.90-9
Available: glibc-common-2.14-5.x86_64 (updates)
glibc-common = 2.14-5
You could try using --skip-broken to work around the problem
** Found 2 pre-existing rpmdb problem(s), 'yum check' output follows:
nss_db-2.2.3-0.5.pre1.fc15.x86_64 has missing requires of libc.so.6(GLIBC_PRIVATE)(64bit)
nss_db-2.2.3-0.5.pre1.fc15.x86_64 has missing requires of libnss_files.so.2(GLIBC_PRIVATE)(64bit)

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