Search for content in files in linux (recursively and case-independent)

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Problem

You would like to find the files that contain some specific text, and would like to do it recursively (ie in a project folder), using something simpler than the find command.

Solution

You can use the following in your current top folder to search recursively, case-independent and by displaying the file number that the searched text appears, with the following:

Getting the slug name for Digital Ocean’s images with doctl

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Problem

You would like to get a list of the available images in Digital Ocean, in order to be able to use them in creating your Terraform IAC script.

Solution

By installing the command line tool doctl, (instructions here), according to the documentation (after authenticating) you can run:

But the available images are not listed. In order to be list all the images you have to add the –public option (as described here) :

Errors were encountered while processing: linux-image-3.13.0-128-generic

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Problem

You are trying to install/remove a package but you always get an error message about linux message as above:

Solution

Try the following:

Use tee command to send output to a file and email

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Problem

You would like to send the error output from a command or a script to both an error file and an email.

Solution

By using tee, you could do the following:

Bash script using default value for empty parameter

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Problem

You have a bash script that accepts parameter(s) but you want to give a default value for a missing parameter.

Solution

For example you have a script that accepts a parameter with the year and month (ie 201703), but you want to give it a default of two months ago if the parameter is missing.

Bash script to add environment and date in Symfony appversion.yml file

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Problem

You are using CI/CD to deploy a Symfony application that has the appversion.yml configuration file, and you want to add the environment and a timestamp to it after deployment.

Solution

You can achieve this by creating and running a bash script like the following and passing the environment as a variable (ie script_name env) :