this post was submitted on 26 Mar 2026
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Regardless of what the app does and whether the thing that does is particularly useful, powerful or important for what you need to do (or even well implemented), what is a command-line interface that you had a particularly good experience both learning and working with?

In other words, I'm thinking about command line interface design patterns that tend to correlate with good user experience.

"Good user experience" being vague, what I mean is, including (but not limited to)

  • discoverability--learning what features are available),
  • usability--those features actually being useful,
  • and expressiveness--being able to do more with less words without losing clarity,

but if there's a CLI that has none of those but you still like it, I'd be happy to hear about it.

Edit: Trying to stress more that this post is not about the functionality behind the tool. Looks like most of first responders missed the nuance: whether app x is better than app y because it does x1 ad x2 differently or better does not matter; I'm purely interested in how the command line interface is designed (short/long flags, sub-commands, verbs, nouns, output behaviors)..

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[–] CodenameDarlen@lemmy.world 14 points 23 hours ago* (last edited 23 hours ago) (2 children)

I like CLI tools that everything I need can be found in a short command --help call, if I don't need to use man command it's even better.

I've used poor CLI tools for example adb you type this and you get almost a scientific article with more than 100 flags to use. No I don't want to need to use grep.

A good one would be pacman it separates clearly what it does instead of shoving it all in a single command.

[–] Aatube@thriv.social 9 points 23 hours ago (3 children)

Personally I dislike pacman as it uses capital-letter flags as subcommands while I'm used to actual subcommands

[–] CodenameDarlen@lemmy.world 2 points 22 hours ago (1 children)

But you can find a good short description about each option with -hS. It's well designed in my opinion because of that, no need to go far to understand it.

[–] Aatube@thriv.social 1 points 21 hours ago* (last edited 20 hours ago)

That's good documentation, not good interface

Edit: For example you could've had pacman sync -h instead

[–] thingsiplay@lemmy.ml 1 points 21 hours ago (1 children)

You can use long option names instead too, as each capital letter mode has a long option name, such as -R --remove and -S --sync.

[–] Aatube@thriv.social 4 points 21 hours ago (1 children)

My problem is that it's a flag and not like # pacman remove

[–] thingsiplay@lemmy.ml 1 points 21 hours ago (1 children)

I don't get why that is a problem. It's just an option name with 2 dashes in front. In fact, that is the "correct" way of handling options, as in standard option processing in GNU / Linux. I personally dislike options without dash, but on the other hand it does not bother me enough to be bothered by it. pacman --remove is almost identical to pacman remove, so I don't know why that is a "problem".

[–] Aatube@thriv.social 2 points 20 hours ago (1 children)

Because it's not an option but a subcommand.

as in standard option processing in GNU / Linux

Guix and standard tooling like perf also use subcommands. I'm used to flags/options modifying the way the same inputs are processed, not completely changing what you give as $1.

[–] thingsiplay@lemmy.ml 0 points 20 hours ago (1 children)

But its just a matter of 2 dashes. It shouldn't be a problem.

[–] Aatube@thriv.social 2 points 20 hours ago* (last edited 20 hours ago) (1 children)

You misunderstand me. It's not about typing it. It's not conforming to prevalent Linux paradigms which creates artificial confusion and learning difficulties. There's a reason it's git pull and not git -L, perf annotate and not perf -A . It's a great semantic difference like <b> vs <h3>. I'm saying this as an Arch user.

[–] thingsiplay@lemmy.ml 1 points 20 hours ago (1 children)

I don't think it would make ANY difference if the option was named git --pull instead git pull (you don't have to use the single uppercase). That is NOT the same semantic difference between and , because it (the pull example) operates the same as before. The only difference are the two dashes. I don't see how this creates confusion or learning difficulties.

[–] Aatube@thriv.social 1 points 20 hours ago (1 children)

The prevalent way (except for ancient tools like tar), and thus the norm, is that options are meant to be optional and subcommands are like old "do one thing" Unix commands (do completely different things, can have completely different set of arguments) but you prepend the name of the software in front of them. You can see the impact of this reflected in documentation for argument parsers: https://docs.python.org/3.14/library/argparse.html#%3A%7E%3Atext=Required+options+are+generally+considered+bad+form+because+users+expect+options+to+be+optional https://gobyexample.com/command-line-subcommands#%3A%7E%3Atext=Command-Line+Subcommands-%2CGo+by+Example%3A+Command-Line+Subcommands%2Cthat+have+their+own+flags.

[–] thingsiplay@lemmy.ml 1 points 20 hours ago (1 children)

I know how subcommands work. But that is not the point I am making. Having two dashes in front of it or not like pacman remove or pacman --remove does not change how the command operates. It is literally having two dashes or not and therefore is not an issue.

[–] Ephera@lemmy.ml 3 points 10 hours ago

Hmm, I don't know about Pacman, but for example openSUSE's zypper remove has a --clean-deps flag, which doesn't exist on the other subcommands. So, it wouldn't make sense to have it be zypper --remove --clean-deps...

[–] bradboimler@lemmy.world 0 points 22 hours ago (1 children)

Why in the world is -S used for install?

[–] thingsiplay@lemmy.ml 2 points 21 hours ago

-S stands for "sync". You are syncing to the online database.

[–] carmo55@lemmy.zip 4 points 21 hours ago (1 children)

Pacman flags not being idempotent (-SS, yy, uu and such existing) is so unbelievably horrible that I can't use arch just because of it.

[–] jonathan@piefed.social 0 points 13 hours ago (1 children)

I've never used Arch, can you explain how it behaves?

[–] carmo55@lemmy.zip 1 points 5 hours ago (1 children)

The flag -y refreshes the package list (like apt update). For some reason, you use the flag -yy to force it to clear the whole package list and redownload everything.

To allow package downgrades when upgrading you use -uu.

These are very commonly suggested fixes to arch package management problems, for example when you leave your arch install to suit for too long, it will be impossible to update it because of dependency problems. So you google it and people are saying to run "pacman -SSyyuu" or other such commands.

Those additional options should be their own flags, command line flags should be idempotent (it should flip a switch on, doing it multiple times shouldn't change anything).

[–] jonathan@piefed.social 1 points 4 hours ago

Okay yeah that's terrible