As you can read in this article , I recently had some trouble with my email server and decided to outsource email administration to Amazon's Simple Email Service SES. So I decided to write a Bash script to automate the process of downloading, properly storing, and viewing new messages.
Here's the complete script all in one piece. After you take a few moments to look it over, I'll walk you through it one step at a time.
We'll begin with the single command to download any messages currently residing in my S3 bucket by the way, I've changed the names of the bucket and other filesystem and authentication details to protect my privacy.
Now's the time to do that if you haven't already. The next section sets two variables that will make it much easier for me to specify filesystem locations through the rest of the script. That's because I want to refer to the files within that directory, rather than the directory itself.
I'll create a new permanent directory within the Best Gaming Keyboards. Best Drones. Best 4K TVs. Best iPhone 13 Cases. Best Tech Gifts for Kids Aged Awesome PC Accessories. Best Linux Laptops. Best Bluetooth Trackers. Best eReaders. Best Gaming Monitors. Best Android Phones. Browse All News Articles. Xbox Series X Bundle. Windows Zero Day. Xbox Virtual Museum. Windows 11 Emoji. GoDaddy Breach. TikTok Samsung TV. It only takes a minute to sign up. Connect and share knowledge within a single location that is structured and easy to search.
I have a folder with a bunch of subfolders, these folders have asciidoctor formated filed with. I am trying to automate the process. I have tried this variation, but it doesn't work:. Linux provides a nice interface for monitoring all file system events like creating, modifying, removing files. The interface is inotify family of system calls, the userspace utilities leveraging these calls are provided by the inotify-tools package in Ubuntu available on the universe repository.
If you don't have it already, install by:. Other possible values include open , close etc. Now the above will show you the filename whenever any is modified, now to run the command on the filename assuming the command takes arguments via STDIN :. You can also setup a recursive watch on the directory, you will then need to use grep to filter the desired files only. Also, you can replace asciidoctor with any other command of your choice, if you want. And from these three, the direvent is the best with no doubt.
It is so useful and reliable to use that I have used it for a simple pipeline with my microservices I have. This is just one of the config files I have in which whenever there is a change for write then this command is executed - which could be a bash script as well. Developed by Sergey Poznyakoff. But installing it using its source code is pretty easy and straightforward which gives you the last version right now is: 5. Using inotifywait is the typical approach, but there's also a separate utility called inotify-hookable that just lets you run a command when a file or directory changes:.
A developer and advocate of shell scripting and vim. His works include automation tools, static site generators, and web crawlers written in bash. For work he tools with cloud computing, app development, and chatbots. He codes in bash, python, or php, but is open to offers. You are going to be killing it with export in bash in no time. Here you will learn how to use export in and outside of bash scripts.
Before you go off and kill any zombies in bash, it always helps if you know where to get help if in trouble. Here is what the help section for export looks like. Copy and paste. Command line help export. Marks each NAME for automatic export to the environment of subsequently executed commands. Nicholas Shellabarger A developer and advocate of shell scripting and vim.
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