The tutorial is about how we can protect ssh with Google Authenticator on Ubuntu 14.04 LTS server . Google authenticator is a security application which implements time based one time password (TOTP) security tokens. It is often also called as “Two steps verification” . The server in which Google Authenticator has been setup , to…
This is a quick post to completely remove package on Ubuntu by apt-get command.Apt-get (Advanced Packaging Tool ) is a command line tool to manage the packages on Ubuntu / Debian system. Remove the package on Ubuntu/Debian Generally remove is the option used with apt-get command. But it do not remove the config files associated…
In this tutorial we will learn, how to prevent starting service after package installation on Ubuntu / Debian . In simple way, we will use the policy.rc.d to control the behavior of invoke-rc.d for every initscript id and action . We will create a executable script called policy.rc.d and write the exit code 101 in…
Nginx, it is one of the awesome open source package which is used for webserver, loadbalancer, reverse proxy server for HTTP, HTTPS, SMTP, POP3, IMAP and HTTP cache server . It is best known for handling the C10K problem . In this post we are writing on , how to install Nginx from source code…
While mounting the Gluster Volume into Ubuntu 14.04 client, recently met with warning that is “WARNING: getfattr not found, certain checks will be skipped..” . We are writing this quick solution for this warning. As the WARNING itself speaks about getfattr not found. So we will work on to get this command on our system….
In this tutorial we will create rpm package of OpenSSH version 6.7 stable version and will do OpenSSH upgrade. You may be wondering why it is required to create rpm package of OpenSSH version. The answer is because of CVE-2014-2532 . We recently notified with the CVE-2014-2532 , which is a openssh AcceptEnv environment restriction…
Recently while upgrading the OpenSSH server, we faced some issue. This time, the issue was related to ssh key and we got number of lines in message log file with information – “error: Could not load host key” . Here are some brief detail taken from our system. Jan 17 11:14:10 localhost sshd[6294]: error: Could…
In this tutorial we will learn, how to upgrade Mariadb 5.5 to Mariadb 10.0 on CentOS 7 / RHEL 7 . We will use yum command in this practical. We will also include preliminary exercises should be done while upgrading MariaDB 5.5 to MariaDB 10.0 . MariaDB is a fork of MySQL Database. And now…
Introduction In this tutorial we will learn, how to install bugzilla with MySQL 5.6 on Ubuntu 14.04 LTS server. Bugzilla famously known as bug tracking tool and it is a Mozilla project. Details of practical environment Server : AWS Ubuntu 14.04 LTS Server InstanceBugzilla Version : bugzilla-4.4.6Web Server : Apache 2.4Database Server : MySQL 5.6…
This is a quick post on how to disable user self registration in Bugzilla. It is very important to disable user self registration otherwise in publicly faced bugzilla anyone can register for new user and will login into bugzilla. Bugzilla is one of the famous web based bug tracking tool. Note: Practical Applied on bugzilla-4.4.6…
Introduction The post will explain , how to change the tmpdir in MySQL Server on Ubuntu. In the temporary directory for MySQL, generally temporary tables are stored. We generally change its path to make our mysql server performance better. Practical Tested On : It will works for other MySQL and Ubuntu version also.Our testing inventory…
The tutorial will explain, how to install the Revive Adserver on Ubuntu. Revive adserver is free Open Source Ad Server formerly known as OpenX Source . Generally the servers are used by many website and blogs.
In this tutorial we will learn, how to install Varnish 4 version on CentOS 7 / RHEL 7 . Varnish is populalry known for Frontend Web Cacheing software. Whereas it can also be used as loadbalancer. Recently , the Varnish version 4 is released, which comes up with new features and also new syntaxes/parameters. The…
In this post we will know about how to find date of expiry and issue of SSL certificate with command line. As a system administrator it is good to know how can we get the ssl certificate information with command line. It helps you to make script and run from terminal/cron job etc. We have…
In this post we will quickly share the commands, which will help to find linux operating system architecture installed on system. Most of the time system admin or linux user requires to know which Linux OS architecture is installed. Mostly , while installing or developing the package or software we need this information. Whereas it…