Freek.dev

Here are some Bash tips that are relatively obscure, or rarely seen, but still worth knowing about.

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Liam Hammett explains how you can use the trap command to stop multiple bash process in one go.

Sometimes when working on a project, I’ll always want to run a handful of commands at the same time, some of which may return when they’re done, others might be long-running, like watchers or services actively exposing ports. This is something that might seem simple to do with a basic Bash script at first, but what if your script has multiple processes running side-by-side and you want to be able to stop them all at once too?

Read more [liamhammett.com]

I wrote 5 lines of bash code to quickly run #Laravel's scheduler, without having to set up CRON jobs on your dev machine ⏳ Copy-paste the snippet here: https://t.co/PQzn6vd3SF pic.twitter.com/HzOLSqMGvc

— Alex (@AlexVanderbist) June 10, 2019

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Bram Van Damme explains how you can get autocompletion for most composer commands.

Read more [www.bram.us]

TIL: $PIPESTATUS lets you access the exit code of a command used in a series of pipes in Bash pic.twitter.com/eRVrPQwnve

— Mattias Geniar (@mattiasgeniar) January 2, 2019

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Last week I stumbled upon this little search utility called Spot, by Guillermo Rauch of Zeit.

• Short & written in Bash: you can edit it easily to suit your liking.
• Fast. Just find + grep + awk.
• Searches most things by default instead of some known predefined extensions.
• Ignores .git, .hg, .svn, devices and binary files.

Read more [github.com]

At Spatie we use GitHub for both our client projects as our open source code. So in our day to day work we often have to open the browser to view issues of a repo or review pull requests.

Paul Irish, a well known developer and part of the Google Chrome team at Google, made a nice bash script to quickly open up a GitHub page from your terminal. If you're on a path inside a git repo and type "git open" that'll open up the corresponding page on GitHub.

The command also supports, amongst others, repos hosted on GitLab.com and Bitbucket.

https://github.com/paulirish/git-open

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If you want to learn some neat bash tricks, read this excellent read by Sam Rowe.

If you’ve ever used GNU/Linux, chances are good that you’ve used bash. Some people hold the belief that using a GUI is faster than using a CLI. These people have obviously never seen someone who uses a shell proficiently. In this tutorial, I hope to show you just a few of the amazing features bash provides that will increase your productivity in the shell.

http://samrowe.com/wordpress/advancing-in-the-bash-shell/

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In a post on his site Mattias Geniar shares how to write for loops in Bash.

Let me first start by saying something embarrassing. For the first 4 or 5 years of my Linux career -- which is nearing 10 years of professional experience -- I never used loops in Bash scripts. Or at the command line.

The thing is, I was a very fast mouse-clicker. And a very fast copy/paster. And a good search & replacer in vim and other text editors. Quite often, that got me to a working solution faster than working out the quirky syntax, testing, bugfixing, ... of loops in Bash.

And, to be completely honest, if you're managing just a couple of servers, I think you can get away with not using loops in Bash. But, once you master it, you'll wonder why you haven't learned Bash for-loops sooner.

https://ma.ttias.be/bash-loop-first-step-automation-linux/

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Apart from simplicity, another advantage of using process substitution is Bash will automatically parallelize your tasks. Returning to our first example…

$ diff <(curl http://somesite/file1) <(curl http://somesite/file2)

… Bash will run both those curl commands in parallel. Sweet huh?

https://medium.com/@joewalnes/handy-bash-feature-process-substitution-8eb6dce68133#.bsbczvvc9

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I run a small hosting provider with more or less 1535 customers and I use Ansible to automate some operations to be run on all servers. Last night I accidentally ran, on all servers, a Bash script with a `rm -rf {foo}/{bar}` with those variables undefined due to a bug in the code above this line.

All servers got deleted and the offsite backups too because the remote storage was mounted just before by the same script (that is a backup maintenance script).

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Transfer.sh is a free service by Dutchcoders that allows you to easily share files from the command line. Here's an example of how you can use it:

transfer my-favorite-file.txt

The given file will be uploaded to the transfer.sh-servers and the command will respond with a short url linking to that file. Pretty neat!

The only thing you need to do is set up a bash function called "transfer" (you can name it anything you want really).

Don't trust the transfer.sh with your supersecret files? Then you can set up your own server to transfer the files to.

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This command will open your working directory in PhpStorm: open -a /Applications/PhpStorm.app "pwd"

For easy usage you can alias the command to "phpstorm".

Update: as mentioned by Nicolas Widart on Twitter and rok in the comments below, you can also use PhpStorm's built in launcher.

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