How to flush your DNS cache on Linux?
To flush your DNS cache on Linux, use the following command in a terminal: /etc/rc.d/init.d/nscd restart That’s all!
Curl commands for Solr
One of the strength of Solr is the ability to communicate with the index trough HTTP, with a client like Curl for example. Here is a collection of useful commands using Curl to manipulate Solr: Force your index optimization: curl … Continue reading
How to flush DNS cache on Mac OSX?
To flush your DNS cache using Mac OSX, launch a terminal and run this command: dscacheutil -flushcache Afterwards, your DNS cache will be flushed. Works on Leorpard, Snow Leopard and Lion.
How to get the size of a directory in Mo on Linux?
It’s sometimes usefull to get the size of a directory in Mo without using ls. Use this command to get it: du -h directory/ The -h argument displays a human readable size of your directory.
How to get syntax highlighting with Vi/Vim on Ubuntu/Debian
To get syntax highlighting with Vi/Vim on Ubuntu/Debian, uncomment these lines in your vimrc file: vi /etc/vim/vimrc ” Vim5 and later versions support syntax highlighting. Uncommenting the next ” line enables syntax highlighting by default. syntax on ” If using … Continue reading
Tutorial MongoDB: Installing MongoDB on Debian or Ubuntu from repository
10gen, the company behind MongoDB, provides up to date repositories for Debian oriented distributions such as Ubuntu. It’s an easy way to install MongoDB on a server. To add the right repository, first accept the 10gen the public key by … Continue reading
Tutorial MongoDB: Setting up a 3 hosts cluster
Overview This tutorial describes how to set up a three hosts cluster with replicas sets and sharding without geographical considerations. It’s a good stating point for training on MongoDB administration and its architecture understanding. Prerequisites You need MongoDB to be … Continue reading
Tutorial Cassandra: Installing and running a single node Cassandra cluster
Installing and running a single node Cassandra cluster is very fast and easy. It could a good first approach for beginners. Here is the steps to run your single node Cassandra cluster. Prerequisites Cassandra need Java to be installed to … Continue reading
Using Nginx as a SSL reverse proxy
Install Nginx You can install a pre-packaged version of Nginx using aptitude apt-get install nginx Setting up your key and certificates Nginx needs two file to manage your sever certificates: one containing your private key and the other containing your … Continue reading
Setting up a standalone HBase instance
Requirements HBase require Java to start. Download and install Download the latest version of HBase in the Apache repository. You cane use these commands for example: wget http://www.apache.org/dist/hbase/stable/hbase-0.90.3.tar.gz tar -xzf hbase-0.90.3.tar.gz cd hbase-0.90.3 You can add HBase binary directory to … Continue reading