Knowledge is Power
Crontab generators http://www.crontab-generator.org/ http://www.openjs.com/scripts/jslibrary/demos/crontab.php http://corntab.com/ Source: http://www.adminschoice.com/crontab-quick-reference Setting up cron jobs in Unix and Solaris cron is a unix, solaris utility that allows tasks to be automatically run in the background at regular intervals by the cron daemon. These...
Source: https://developer.xamarin.com/guides/cross-platform/getting_started/installation/uninstalling_xamarin/#Uninstall_Xamarin.Mac Uninstall script – xamarin_uninstall.sh #!/bin/bash # This is a simple script to uninstall Xamarin from your machine. # Uninstall Xamarin Studio rm -rf “/Applications/Xamarin Studio.app” rm -rf ~/Library/Caches/XamarinStudio-* rm -rf ~/Library/Logs/XamarinStudio-* rm -rf ~/Library/Preferences/XamarinStudio-* rm -rf ~/Library/XamarinStudio-* # Uninstall...
Extract text from ORC files (source) Hive (0.11 and up) comes with ORC file dump utility. dump can be invoked by following command, $ hive –orcfiledump <location-of-orc-file> Create hive table definition using ORC files on HDFS $ hive –orcfiledump hdfs:///data/location/of/the/ORC/file.orc...
Functions Beeline Usage: Beeline username [queuename] export beeline_jdbc=”jdbc:hive2://servername.fqdn:10000″ Beeline(){ if [ -z “$beeline_jdbc” ]; then echo “Error: beeline_jdbc var not available” fi if [ -z “$1” ]; then echo -e “No user specified.\nUsage: Beeline <user> [<queue>]” return 1 fi queue=”default”...
Once you sync users in Apache Ranger they will stay in the database even if we sync ranger users from a different source. All those users will clutter up the Ranger user interface. Following two scripts will help in deleting...
Tested on CentOS 6.8 Minimal ISO install with Hue 3.11 Downloads Hue 3.11 Steps Download Hue tarball Install dependencies yum install python-devel libffi-devel gcc openldap-devel openssl-devel libxml2-devel libxslt-devel mysql-devel gmp-devel sqlite-devel openldap-devel gcc-c++ rsync Compile You can either compile...
Source: http://stackoverflow.com/questions/32373460/parquet-vs-orc-vs-orc-with-snappy Datasets Table A – Text File Format- 2.5GB Table B – ORC – 652MB Table C – ORC with Snappy – 802MB Table D – Parquet – 1.9 GB Parquet was worst as far as compression for my table...
less packs more power than “more” or “tail” commands tail -f like functionality Usage: $ less +F file.log If only $ less file.log is invoked pressing F will switch back to mode similar to tail -f Enable row number -NR inside less enables...
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References http://hortonworks.com/hadoop-tutorial/manage-security-policy-hive-hbase-knox-ranger/ http://hortonworks.com/blog/best-practices-in-hdfs-authorization-with-apache-ranger/ http://hortonworks.com/blog/best-practices-for-hive-authorization-using-apache-ranger-in-hdp-2-2/ http://hortonworks.com/blog/author/balajiganesan03/ http://www.slideshare.net/hortonworks/ops-workshop-asrunon20150112 Related posts: Deleting users from Ranger database (mysql) Apache Ranger tips and tid bits Remotely debug hadoop Good looking .hiverc file
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