Operating Systems

[Solved] libxslt is missing. please visit http://nokogiri.org

While installing Nokogiri on Ubuntu, you may get stuck with error libxslt is missing. please visit http://nokogiri.org/ The error occurs due to missing dependencies required for installing Nokogiri on Ubuntu. Install dependencies: sudo apt-get install libxslt-dev libxml2-devsudo apt-get install libxslt-dev libxml2-dev Install Nokigiri: sudo gem install nokogirisudo gem install nokogiri The more information related to Nokogiri installation can be found …

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[How To] Clear bash history in Linux

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Sometimes, sensitive commands are present in your server bash history. Another user logging in the server will be able to access history of your commands as Linux stores command in the .bash_history file of the user. To delete / clear the bash history of a user, execute following command: history -c && history -whistory -c && history -w The above …

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[How to ] Fix OpenSSL for Heartbleed Vulnerability

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As you are all aware of the latest OpenSSL vulnerability termed as "Heartbleed", many blogs are providing information what it is and how does it affects. I am going to focus on fixing the OpenSSL Heartbleed vulnerability in this post. Which OpenSSL versions are affected? The OpenSSL version 1.0.1 is vulnerable except version 1.0.1g. Other versions like 1.0.0, 0.9.x are …

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[How To] Enable NTFS support on Ubuntu/CentOS/RHEL/Fedora

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The Linux operating systems supports NTFS partition format. To enable NTFS partition support, there are some packages required to be installed. To enable NTFS support on Ubuntu: 1 # sudo apt-get install ntfs-3g# sudo apt-get install ntfs-3g CentOS/RHEL: 1 2 # yum install ntfs-3g # yum install ntfsprogs ntfsprogs-gnomevfs# yum install ntfs-3g # yum install ntfsprogs ntfsprogs-gnomevfs Note: Enable rmpforge …

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[How To] Install VirtualBox on RHEL / CentOS

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Oracle's VirtualBox is a cross platform virtualization application. It runs on minimum hardware configuration and very easy to use. To install VirtualBox on RHEL / CentOS using YUM utility: 1) Enable VirtualBox repository: 1 vi /etc/yum.repos.d/virtualbox.repovi /etc/yum.repos.d/virtualbox.repo virtualbox.repo file should contain following details: [virtualbox] name=Oracle Linux / RHEL / CentOS-$releasever / $basearch - VirtualBox baseurl=http://download.virtualbox.org/virtualbox/rpm/el/$releasever/$basearch enabled=1 gpgcheck=1 gpgkey=http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc 2) Install …

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[How To] Install Sendmail on Amazon EC2 BitNami stack server

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The Amazon EC2  BitNami stack servers are used for hosting e-commerce/web applications. BitNami stacks are ready to use virtual machines. Being an e-commerce/Web application, it will require functionality to send email from the server. One may receive below error in the Apache error log if Sendmail service is not present in the server. /usr/bin/sendmail: not found/usr/bin/sendmail: not found Solution 1) Install …

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