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 Access denied: uid 818, target uid 663 in /var/log/messages lines

These messages mean that someone is using symlink owned by user UID 818 trying to access file...

 Applying Machine Learning to DevOps

There is powerful synergy between DevOps and Machine Learning (ML) — and related capabilities,...

 Commands to check whether a Disk is SSD or HDD in Linux

Method 1: Check if the disk is rotational Since kernel version 2.6.29, Linux systems can...

 Common SSH Commands - Linux Shell Commands

Navigating in UNIX pwd Shows the full path of the current directoryls Lists all the files in the...

 Configuration management for distributed systems

Configuration ManagementWhen working with large-scale software systems, configuration management...

 Creating a Welcome message for SSH logins

Login to your server as "root". Then type in the following: pico /etc/motd Now type in the...

 Difference between HDD and SSD?

HDD:Traditionally hard drives are spinning device that is non-volatile storage, which means the...

 Different PHP versions per directories using SuPHP

We had few requests to support different PHP versions per directory . While this is not...

 Fabric8 and it's important in Integration

Fabric8 is easy to install on your laptop, on an existing Kubernetes or OpenShift cluster or the...

 Facts on Bandwidth

How much is 1 meg? Every time someone views your web page all of the data (html code, text,...

 How do I track how many hits my website gets?

There are a few things that need to be cleared in terms of terminology: 1. Hits - this simply...

 How to Install GMP Math library?

wget http://ftp.sunet.se/pub/gnu/gmp/gmp-4.2.2.tar.bz2 tar -xjvf gmp-4.2.2.tar.bz2 cd gmp-4.2.2...

 How to Install LAME?

wget http://oratoronline.com/how2/video_share_modules/source_directory/lame/lame-3.96.1.tar.gz...

 How to Upgrade perl?

Run the following command: cd /usr/local/src ; wget...

 How to add cron job on Asuswrt Merlin Wifi Router?

Asuswrt-Merlin is an improved version of Asuswrt, the firmware adopted by Asus’s modern wifi...

 How to add encrypted ZFS pool on FreeBSD server?

Type any one of the following commands: # camcontrol devlist OR # geom disk list List...

 How to install Crypt-DSA?

Crypt:: DSA is an implementation of the DSA (Digital Signature Algorithm) signature verification...

 How to install ImageMagic?

cd /usr/local/src wget http://oratoronline.com/how2/ImageMagick/ImageMagick-6.4.2-3.tar.gz (NOTE:...

 How to install Ioncube?

cd /usr/local/ wget http://oratoronline.com/how2/Ioncube/ioncube_loaders_lin_x86.tar.gz tar -xvzf...

 How to install RAR?

cd /tmp wget http://oratoronline.com/how2/RAR/rarlinux-3.6.0.tar.gz tar -zxvf...

 How to install RVskin?

mkdir /root/rvadmin cd /root/rvadmin wget http://oratoronline.com/how2/RVskin/rvauto.tar.bz2...

 How to install RkHunter>?

wget http://oratoronline.com/how2/Rkhunter/rkhunter-1.3.2.tar.gz tar -zxvf rkhunter-1.3.0.tar.gz...

 How to install SIM?

Installation steps: 1. Login to your server via SSH as root. 2. Download the most current...

 How to install Subversion/SVN?

wget ftp://oratoronline.com/how2/subversion/perl-URI-1.35-3.noarch.rpm rpm -i...

 How to install Zend Optimizer?

Zend Optimizer is a PHP addon which offers caching to improve speed when loading sites, it can...

 How to install and configure OpenVPN client on OpenBSD?

OpenBSD is a free and open source operating system with a strong focus on security. OpenVPN is a...

 How to install chkrootkit?

cd /usr/src wget http://oratoronline.com/how2/chkrootkit/chkrootkit.tar.gz tar zxvf...

 How to install eAccelerator?

Installing Eaccelerator 1. Using SSH, log in as the root user. you should be in the default...

 How to install ffmpeg?

Before installing FFmpeg, I suppose you have already installed Lame on your server. FFMPEG:...

 How to prepare FreeBSD server to be managed by Ansible tool?

Ansible is easy to use IT automation and DevOps tool. One can use it for automation tasks. You...

 How to upgrade cPanel?

Login to your WHM and do the following:WHM> cPanel/WHM Updates Automatic (STABLE tree) cPanel...

 Howto Install FLv2Tool?

yum install ruby* wget...

 I am running CloudLinux in a Xen VM, and getting "4gb seg fixup"

There is an information that XEN memory management could break TLS in glibc. Try to switch to...

 ImageMagick is slow

ImageMagick tries to use all available cores. This causes a significant waste of resources due to...

 Introduction to the Red Hat SELinux

Security-Enhanced Linux (SELinux) is a security architecture integrated into the 2.6.x kernel...

 Managing mysql packages on cPanel server if mysql-governor installed

If you have mysql-governor installed, all mysql upgrades and version changes should be...

 MySQL/MariaDB crashes and restarts often on cPanel server

LFD kills MySQL every hour because the binary from CloudLinux is not installed in the same path...

 Plesk backup: Apache keeps restarting while backup

Symptoms:  The customer creates a backup, but it does not contain the site's content upon...

 RedHat OpenShift

Red Hat OpenShift is a multifaceted, open source container application platform from Red Hat Inc....

 SNMP is not working properly

If you are having issues with SNMP info being incorrect, try adding the following into snmpd.conf...

 Segmentation Fault in different places (yum - clnreg_ks - cldeploy)

When you see Segmentation Fault in different random places it could be caused by bad/broken libz*...

 Setup Let’s Encrypt With Nginx on Ubuntu 18.04 & 16.04 / CentOS 7 / Debian 9

Let’s Encrypt is a widely known certificate authority that provides free X.509 SSL certificates...

 Site is not working with opcache PHP extension enabled

The symptoms: your site throws error 503, or just a blank page with opcache extension enabled....

 SystemTap

SystemTap can monitor multiple system-wide synchronous and asynchronous events at the same time....

 WHM Cpanel on Amazon EC2 Servers + FTP TLS Dreamweaver Issue

Note: If you are forcing TLS, then make sure that you have already configured your...

 What is the Difference Between the macOS and Linux Kernels?

Features of the macOS Kernel  The macOS kernel is officially known as XNU. XNU is “a hybrid...

 Why CageFS installation changes jailshell to regular bash on cPanel?

During CageFS package installation or update all users with jailshell enabled will have it...

 Why in lveinfo I see zero aCPU value?

aCPU stands for Average CPU. In the shared hosting majority of customers have their sites hit...

 grub appends garbage characters

If you use "e" to edit currently selected command in the grub menu at boot time, you can face an...

 lve_zombi kernel threads appear. What are they?

lve_zombi kernel threads appear after lvectl destroy (or cagefs --remount) to clean up...