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Web notebook about thoughts and discoveries in DevOps, SRE, Software Engineering….

Posted on 23 October 2017 by kosmas

Problem

You would like to run a migration in a symfony 2x project either up or down.

Solution

You can run the following for getting a migration up or down:

php app/console doctrine:migrations:execute 20171020125225 --up

php app/console doctrine:migrations:execute 20171020125225 --down

Posted on 10 October 2017 by kosmas

Problem

You have a text file that has empty lines, and you would like to remove them.

Solution

You can use awk in linux like the following to create a new file with the empty lines removed:

awk 'NF' file_with_blank_lines > file_without_blank_lines