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September 2014


Basic vi Commands

General Startup To use vi: vi filename To exit vi and save changes: ZZ or :wq or : x To exit vi without saving changes: :q! To enter vi command mode: [esc] Counts A number preceding any vi command tells vi to repeat that command that many times. Cursor Movement …


An introduction to Apache Hadoop for big data

Apache Hadoop is an open source software framework for storage and large scale processing of data-sets on clusters of commodity hardware. Hadoop is an Apache top-level project being built and used by a global community of contributors and users. It is licensed under the Apache License 2.0. Hadoop was created …