Category Archives: Uncategorized

Setting up Galera notification command on on Ubuntu

Galera Cluster: Galera Cluster is a synchronous multi-master database cluster, based on synchronous replication and Oracle’s MySQL/InnoDB. When Galera Cluster is in use, you can direct reads and writes to any node, and you can lose any individual node without … Continue reading

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Best Java tools for profiling

Best Java tools : Recently, I was building real-time, high performance back-end Java application which computes 16K ratios per company for around 70K companies (~1.1bn total) by pulling data from different data sources like, Mongodb, Cassandra, Mysql and Redis. It … Continue reading

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How to setup cassandra on Ubuntu 14.04

What is Cassandra? The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance. Linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure make it the perfect platform for mission-critical data.Cassandra’s … Continue reading

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How to setup a virtual machine

How to setup a virtual machine ? This post covers how to setup VirtualBox , VMware Workstation, VMware Player and Vagrant applications and how to setup guest operating system. Here, I’ve selected Windows 10 Home as Host OS and Ubunbu … Continue reading

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Setup solr using zookeeper ensemble on ubnutu

Setup Oracle Java: Follow quick step given below to setup java latest version on your system, java -version tar -zxvf jdk-8u45-linux-x64.tar.gz sudo mkdir -p /usr/lib/jvm/jdk1.8.0_45 sudo mv jdk1.8.0_45/* /usr/lib/jvm/jdk1.8.0_45/ sudo update-alternatives –install “/usr/bin/java” “java” “/usr/lib/jvm/jdk1.8.0_45/bin/java” 1 sudo update-alternatives –install “/usr/bin/javac” … Continue reading

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Setup zabbix on ubuntu

Setup zabbix on ubuntu: Zabbix is the ultimate open source enterprise-level software designed for monitoring availability and performance of IT infrastructure components. For more details visit following links, www.zabbix.com www.zabbix.org Install Zabbix: # wget http://repo.zabbix.com/zabbix/2.2/ubuntu/pool/main/z/zabbix-release/zabbix-release_2.2-1+precise_all.deb # sudo dpkg -i zabbix-release_2.2-1+precise_all.deb … Continue reading

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Ubuntu fix Shellshock bug

Ubuntu fix Shellshock Bug : Test if your system is vulnerable, $ env X=”() { :;}; echo shellshock” `which bash` -c “echo completed” shellshock completed If you got “shellshock” in output then it is vulnerable. Bash has functions, though in … Continue reading

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Install HP printer driver on Ubuntu

Install HP printer driver on Ubuntu: Install using repository driver: # sudo aptitude install hplip Install using new updated driver: Follow step on link given below, HP driver Installation Wizard if you got following error , error: A required dependency … Continue reading

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