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Blog / Linux/Shell

How to Keep Docker Containers Running

Docker containers, when run in detached mode (the most common -d option), are designed to shut down immediately after the initial entrypoint command (program that should be run when container…

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January 25, 2021
Blog / Linux/Shell / Programming

How to Change Hadoop Output Delimiter

Hadoop’s default output delimiter (character separating the output key and value) is a tab ("\t"). This post explains how to change the default Hadoop output delimiter. Output Delimiter Configuration Property…

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January 25, 2021
Blog / Linux/Shell

How to Uppercase/Lowercase Text in Unix/Linux

Uppercasing and lowercasing is a common task when working with text. Below are examples of doing this with standard Linux/Unix utilities. Lowercasing text with tr tr 'A-Z' 'a-z' Uppercasing text…

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January 25, 2021
Blog / Linux/Shell

How to Uppercase/Lowercase text with sed

sed is a common Linux/Unix utility used to parse and transform text. Below are examples of uppercasing and lowercasing text with sed: Uppercasing Text with sed sed 's/[a-z]/\U&/g' [a-z] is…

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January 25, 2021
Blog / Linux/Shell

Convert JSON to TSV with jq

jq is a lightweight JSON command line processor that makes many JSON processing tasks very easy. A common task when working with JSON is to convert records into a TSV…

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January 25, 2021
Blog / Linux/Shell

Convert JSON to CSV with jq

jq is a lightweight JSON command line processor that makes many JSON processing tasks very easy. A common task when working with JSON is to convert records into a CSV…

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January 25, 2021
Blog / Linux/Shell

How to checkout git tags

Tags in Git are a way to bookmark specific commits. This is often done to indicate different versions or releases of a project. There is no straight forward way to…

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January 25, 2021
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