tee command
Split program output to console and to a file Basic usage $ command | tee out_file.txt Appending to the output file using -a $ command | tee -a out_file.txt Redirecting stderr and stdout $ command |& tee -a out_file.txt Example...
adhocshare Blog
Apache Ranger tips and tid bits
1. Error syncing users Observation: org/apache/commons/httpclient/URIException in ranger log ERROR UserGroupSync [UnixUserSyncThread] – Failed to synchronize UserGroup information. Error details: java.lang.NoClassDefFoundError: org/apache/commons/httpclient/URIException at org.apache.ranger.unixusersync.process.PolicyMgrUserGroupBuilder.delXUserGroupInfo(PolicyMgrUserGroupBuilder.java:615) at org.apache.ranger.unixusersync.process.PolicyMgrUserGroupBuilder.delXUserGroupInfo(PolicyMgrUserGroupBuilder.java:600) at org.apache.ranger.unixusersync.process.PolicyMgrUserGroupBuilder.addOrUpdateUser(PolicyMgrUserGroupBuilder.java:326) at org.apache.ranger.unixusersync.process.FileSourceUserGroupBuilder.updateSink(FileSourceUserGroupBuilder.java:97) at org.apache.ranger.usergroupsync.UserGroupSync.syncUserGroup(UserGroupSync.java:113) at org.apache.ranger.usergroupsync.UserGroupSync.run(UserGroupSync.java:87) at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.ClassNotFoundException: org.apache.commons.httpclient.URIException at...
Mac OS tips
Change hostname Change hostname $ sudo scutil –-set HostName <new hostname> Related posts: Super charge bash with these bash_profile tips SSH Auto completion on OSX Can’t connect Excel to Hive using ODBC driver on MAC brew packages and...
Setup common git location and work on any project from any location (Everything local)
Objective Have a common place on local system to store all repositories. Work on any project from anywhere on local system and keep the updates (repo push) synced to common place. We can then make google drive to backup the common repository...
Git .gitignore file sample
Source: https://github.com/github/gitignore/blob/master/Global/JetBrains.gitignore Use the following .gitignore from Jetbrains. # Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm # Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839 # User-specific stuff: .idea/workspace.xml .idea/tasks.xml # Sensitive or high-churn files: .idea/dataSources/ .idea/dataSources.ids .idea/dataSources.xml .idea/dataSources.local.xml .idea/sqlDataSources.xml .idea/dynamic.xml .idea/uiDesigner.xml...
git scm references
References https://www.garron.me/en/articles/git-linux-mac-private-server.html https://coderwall.com/p/9lzkww/setting-up-a-git-daemon-on-mac-os-x Simple Git server – https://itunes.apple.com/us/app/simple-git-server/id1040403936?mt=12 https://github.com/bard/sameplace/wiki/Getting-started-with-git Related posts: A nice .vimrc A Secure HDFS Client Example Hadoop Hive UDTF Tutorial – Extending Apache Hive with Table Functions Parsing XML using JAXB in Java
Parsing XML using JAXB in Java
Process Objective is to create Java class files that represent schema from the XML data. Create XSD from XML Generators: http://www.freeformatter.com/xsd-generator.html, http://xmlgrid.net/xml2xsd.html, https://devutilsonline.com/xsd-xml/generate-xsd-from-xml Use xjc on XSD to create JAXB Java classes $xjc sample.xsd Creates a generated/ folder in the same...
SAX v/s DOM. How to choose between DOM and SAX?
Source: http://geekexplains.blogspot.com/2009/04/sax-vs-dom-differences-between-dom-and.html Differences between DOM and SAX. When to use what? Before going through the differences, if you need a refresh of what SAX and DOM are, please refer to this article – SAX, DOM, JAXP, & JDOM >>. While comparing...
AWK Syntax
AWK syntax: awk [-Fs] “program” [file1 file2…] # commands come from DOS cmdline awk ‘program{print “foo”}’ file1 # single quotes around double quotes # NB: Don’t use single quotes alone if the embedded info will contain the # vertical bar...
Chart of similar operations with sed and awk
Chart of similar operations with sed and awk ——————————————– string ====== sed “s/from/to/” awk ‘{sub(“from”,”to”); print}’ sed “s/from/to/g” awk ‘{gsub(“from”,”to”); print}’ sed “s/from/to/3” awk ‘{$0=gensub(“from”,”to”,3); print}’ regex ===== sed “s/reg.*$/_&_/” awk ‘{sub(/reg.*$/, “_&_”); print}’ sed “s/reg[ex]/YY/g” awk ‘{gsub(/reg[ex]/, “YY”); print}’...
