Linux

It’s here, it’s there, it’s everywhere. The problem with replacing things that work with something “better” is that “better” is subjective, so you end up with a new “better” way every few years, and maintaining existing systems becomes a god awful slog. See the JavaScript ecosystem.

The bash I wrote 10 years ago still works today, and it will still work in 10 more years. The same bash will very likely work on your computer, on a remote server, etc. This is the power of not chasing “better” all the time.

Try running a Ruby or Node program from 10 years ago today on your computer. Now, try running it on a random Linux server.

Please do not take this as a slight against Ruby or Node, or any other high level programming language. Bash compared to those is simply apples and oranges, they are not the same thing.

By all means, if you have a project that requires a Ruby runtime anyway, write operational scripts with Ruby, run them with Rake, etc.

Want a portable script that doesn’t depend on a complex runtime? Use bash.

If bash is too limiting, use Perl. No, seriously. Perl is fine. It is about as ubiquitously available as bash, and the standard library likely has what you need to get the job done. People blindly dismiss Perl because some blog post told them to, usually in the context of writing application code. You’re not writing application code, you’re writing scripts. Would you write an application with bash? No.

Bash is fine. Now powershell, that's utter garbage.

What features does bash have that make it so suitable for shells?

You mean, except being automatically available in basically every Linux distribution without having to install any additional software?

why are you stuck with bash? just write a shebang and then your interpreter in the first line of your script.

i can use bash, python, lua and al kinds of stuff...

i don't understand the question. if you mean, why does my shell only accept bash syntax, if i set my shell to bash, idk. use another shell?

'sh' is kind of the smallest common thing that's available everywhere. so when you got to script something that needs to run somewhere not under your control, you use 'sh'. and that's kind of it works. you'll find something, that's been around for some time, otherwise it won't have spread everywhere. and now you can't replace it in newer products, because there is so much stuff using it.

if that isn't one of your problems, go with my first suggestions and just use python or something like that as your scripting language.

It seems that you fundamentally misunderstand what bash is supposed to be.

It is not meant to be a complete general purpose programming language, it's a scriptable shell that allows you to automate tasks that you would otherwise accomplish interactively using said shell. Its strength is that it leverages the various powerful command line programs that are installed on a typical Linux system (i.e. grep, cut, awk, sed, ...), so that you don't have to reinvent the wheel and so that any commands you can run interactively in the shell can easily be integrated in a bash script with some basic parameterization and flow logic around it. That's also why it doesn't have built-in libraries for everything under the sun, it expects the available system utilities to do much of the heavy lifting. For example, you want json parsing? Use jq. You want to call a webservice? Use curl. You want string handling? Use grep, sed, cut, awk, ... You want to manipulate system services? Use systemctl, and so on.

If you want to use bash as a general purpose programming language, you're doing it wrong. Look at python if you want a more advanced and self-contained scripting language, and if that doesn't cut it, use one of the compiled languages.

Bash scripts can be slower compared to compiled languages like C or Java. This is because Bash is an interpreted language, and each line of code is interpreted at runtime

No, bash scripts are sometimes slow because it forks a lot of processes. For example, if you have a tight loop that you iterate through 10,000 times and there's a grep inside the loop, it will fork grep 10,000 times.

Bash isn’t the only shell. Most systems can use zsh or fish or tcsh or whatever shell you prefer, if you like that better than bash. You’re gonna have to run a shell if you want to use the terminal, though, you understand that?

Shell scripts are very good for specific tasks. Don’t use them for tasks that are unsuitable. Use python or go or node or c if those are better for your needs. Use the right tool for the job. But also, learn to understand why the industry has been using shell scripts for decades.

Why did you write this post in English instead of Esperanto? English is a pretty shit language, especially as the Lingua Franca...

As for your reasoning, it's obvious you don't know what bash is used for. It's purpose is to get shit done quickly and to make working with cli tools easy. For tasks where you need to write more than a few lines of code, or need a feature like cross platform compilation, you should switch to a proper language.

As for why that's good, try writing something along the lines of "curl | jq | cat >> file" in C. For extra points write it out in a single line, in under a minute, while also keeping it perfectly readable.

POSIX compliance for the most part. Which is meant to give you a consistent API you can write software against that will work on any UNIX system. At least that is the theory behind it. It basically acts as a lowest common denominator for UNIX systems. Want to write a script that will work on all systems - bash or a similar shell will almost certainly be present.

A new system can change this if they wanted to. But then they won't be able to take advantage of all the existing bash scripts out there that everyone is writing. Which adds a lot of friction to adoption.

So in a way we are locked into a bash like shell now. Unless you can get a lot of distros to change this shell it is very hard to change it for a single one. And changing something so fundamental across lots of distros will upset a lot of people that are used to bash.

And shells overall are preferred to general purpose programming languages as their main focus is executing other commands and piping input/output from one to another or to/from files. Something most programming languages make a bit awkward as that is not their focus.

There are a bunch of non-POSIX shells, like fish, nushell, ion etc but these will likely not become the default anytime soon due to the inertia that bash has. But luckjly you can install what ever shell or language you want in addition to bash and switch to that for your interactive shell or even scripting if you want to. They just won't become the defaults for a long time - if ever.

I wouldn't use the word "stuck", Bash is a result of over 50 years of technological advancement and experience. It works on servers, remotely, is lean and powerful. It's not that user friendly, because it doesn't need to be.

ZSH and Fish are available on *nix systems for a little bit more sugar. I personally don't use raw Bash because I just love what ZSH can do, but I love writing Bash scripts.

Let's see here. We're talking about a thirty-plus-year-old language that was deliberately written as a superset of sh from 1979. Its main purpose is to glue together other command-line programs on 'NIXish systems to automate complex procedures for sysadmins. Using it as a general-purpose programming language, while not impossible, is kinda dumb if you have any other options. Within its original niche, it ain't broke, so there's no need to fix it.

It's a contemporary of Tcl and Perl, not of Python and Java (and sh is from the era where microcomputers mostly used BASIC dialects). Unlike Perl, it didn't bolt on object orientation or other more modern features afterwards—and really, Perl was intended as just the kind of "shell script killer" you seem to be thinking of in your introduction. However, it never completely displaced the shell built-in scripting languages even in the days before it fell out of favour itself. Might be that there's a reason for that.

You're not. Your shell is set in /etc/passwd. Set it to iPython if you want.

Everyone talks about the fact that Bash is what it is because it is first and foremost an interactive shell, but nowadays some design decisions are just inexcusable in my opinion, like the awful syntax of common programming constructs, the if in particular, that would only benefit from following how every other language works even if they aren't meant as shells.
Some also argue against the non-modularity with the fact that you should use it for only quick and easy stuff, but that's just an excuse, if the language runtime that comes preinstalled in your system had modern features and sane syntax you would stick to that and save yourself from installing Python/Ruby if they're not needed; and it is clear that there is a need for modularity, otherwise plugin managers wouldn't exist, many swear by downloading the scripts directly and sourcing them in the name of "KISS", but that is just silly when there is a good system set in place that makes it actually easier to manage it all.
Then there's the issue of the holy pipelining, that has more or less been overcome by some languages already, this example in Rust shows that it can be easy, so there's no reason why a terse scripting language couldn't achieve the same.

In the end I don't know what's holding the landscape back, I noticed Xonsh that looks very interesting, but I never tried it, I wonder if it is POSIX compliant and if that aspect even is so fundamental to the success of a shell

I think you just need to use the right tool for the job.

Personally bash scripts are fine for any basic comparison operations or just running stuff together like a windows batch file. Maybe checking result codes, searching for processes, selectively killing etc.

Beyond that, but where I expect it to be still a convenience/automation script I use perl (which is where probably most people would now use python, but I'm old). It can still be run from command line, it can access databases, can be OO if you want it to (but generally if I am going that far I move to a faster language) and in general for moderately complex automation I use perl.

If it gets complicated (250+ lines as a general rule) or needs speed, then I'd move onto a proper programming language because now it has become a project.

But, that's just me.

Check out xonsh.

You aren’t. Even if you want to stick with bash, you can run scripts written in other languages. I have a few Ruby scripts. I can run them just like I do bash scripts.

I know I am reviving an old thread, but my philosophy is that posts are timeless and age should not be a reason not to respond.

Currently I am in the project of learning Rust and Raku, because I am interested in becoming a better systems programmer and I want to be able to do things for my computer without hitting a wall when a solution does not exist, or simply to master my second home.

This is a mindset issue. There is a lot of legacy opinions on how to use your computer, but never forget it is YOUR computer. I say never worry about something being portable to others. What you make will be portable to you, and that is all that matters. Make your computer yours. If someone wants to use your computer but can't, isn't that a win?

Check out xonsh.

Because for what it was made to do and what I want to use it for, it's utterly ideal. It's easy, it's direct, it works seamlessly with any program's command line, and I can run anything network-wide on any linux machine on my network out of box with no fiddling around. No check for version, no missing packages to hunt up, no libraries to download and verify; I type, I save, it runs, I'm done. If I need to integrate command line tools on six separate programs and/or five to eight scripts in two languages to do a stat/resource/network check on my Linux machines, I can do them all from one script and I can do it to six separate machines over ssh in a loop in under 200 lines of code and throw the results up on a webpage in apache with another thirty if I want to make it pretty in html. Then I set it to a cron job to run once an hour and forget it for months; it keeps on keeping on, I just check that webpage to see everything is fine, in separate tabs even. And I can do all that very very very fast and literally out of box; if I add a brand new machine, all I do is copy my base bash library over and set permissions and it's ready to go.

Those scripts will always work, on every linux machine, every time, in the same way; they will run in ubuntu, solus, fedora, arch, debian, raspberry pi, probably slackware I haven't checked, the scripts do not care. Ones I wrote ten years ago are still running just fine.

Bash is kind of like the general of my script and cli army; she does not need to know everything herself, she just needs to organize the troops to do their jobs, and tell me if someone's slacking off because python decided to be a dick about a package or php is being cranky or apache just won't speak to anyone no idea wtf is going on there or otbr vanished into the ether or all my wifi drivers are in revolt after an update. She does not stress me at all; she is the finder of my stresses before the drama hits critical, and this is why she is my favorite.

For the same reason GNU is still using lisp.

Software conservatives and software elitists. They refuse to evolve and for that reason we're stuck with bash.