bash vs zsh

The above article may contain affiliate links, which help support How-To Geek. Join 350,000 subscribers and get a daily digest of news, comics, trivia, reviews, and more. Specifically to put he info you’d like – /w gives the path. The original Bourne Shell (sh) is not the same as BASH. You’ll be using Bash instead of Zsh. wake me up when there’s a real replacement for bash. How-To Geek is where you turn when you want experts to explain technology. The post has been updated to reflect your comment. Once you open up a new terminal window, it should load sh with Oh My Bash's configuration. They aren’t, and many people like the zsh variants better. Haha just having a good time reading the comments… As all unix tools around for nearly 40 years, each one is a lifestyle rather than a simple tool. Another practical aspect of both shells is their tab auto-complete functions. You might need to modify your PATH in ~/.bashrc if you're not able to find some commands after switching to oh-my-bash. It was initially written as a replacement for the Bourne shell. To set up powerlevel9k (if you installed Oh-My-Zsh) just clone the repository into the .oh-my-zsh custom themes folder: After that, source your .zshrc, and you should see the changes applied. And the standout feature of zsh seems to be its builtin level of customizability. In iTerm2 I can do COMMAND+CLICK on a URL and launch a browser. I’m not saying these things are equivalent to their zsh counterparts. This way you never have to git branch to know the current branch. In 1971, the very first version of the Unix operating system came with the Thompson shell as its default shell. All Rights Reserved. Similar to the above, Oh My ZSH also adds a plugin that will display the current branch you are on in a. project. Bash was certainly not released in 1977. Here’s mine, with a minimal prompt: You can find the full documentation for powerlevel9k on the repo. , zsh uses a dot file to store user configuration settings. Maybe you could have run this past a fan of bash before printing it so that they could have helped you root out the misleading bits. Bash is a GNU project and was first released in 1989. Pro. This will load a new random theme each time you open up a new session in the shell. I am sure you can even port DOOM to bash or ZSH or SendMail or Vi. I program in C and C++, apart from hello-world types, never done any major scripting. As mentioned above, zsh comes with hundreds of different themes to choose from. I have a perl script that starts at startup that does this , but that seems like using a sledge hammer to kill a fly. Before we talk about the differences let’s just say that bash is still here and if your script is called as bash then it will still work just fine. Spelling correction and approximate completion installed, all you have to do to set it as your default shell is run the following command: If for some reason you’d like to return to, as your default shell, first find out where. Even in terms of visual appeal and organization, both shells accomplish the task fairly well. Put the name of the name you want to use (inside of quotes), then save the file. Crystal hopes to continue her studies in computing and technology in her post-secondary education. The default zsh completion is much more convenient for me that bash's, at least on arch linux. Although many other shells exist for the terminal, one of the most popular shells is zsh, or the “Z shell”. This is a nice article. For the most part, bash can support the majority of Bourne and C shell’s features in addition to its own unique additions including command-line editing and integer calculations. However, they both possess some distinctions that can create a preference for one over the other among developers. That click and open thing is a function of your terminal emulator, not zsh. Here you’ll find how to set up your prompts (PS1 is the primary and there are others for different uses PS2..4). For one, zsh has the leverage of a powerful online community called Oh My Zsh. Knowledge and familiarity with one shell can easily be translated into the other without tackling a steep learning curve. If you’re on Windows, you may not even have Bash in the first place. He's written hundreds of articles for How-To Geek and CloudSavvy IT that have been read millions of times. Since it’s based on the same shell as Bash, ZSH has many of the same features, and switching over is a breeze. The post has been updated to present bash and zsh more accurately based on your comment. Well, that an ksh. The invocation features in Bash is better when comparing with Zsh. This action will then immediately display all of the available options for that command. zsh will differentiate the two by adding color highlighting to directories. except for the “z filepath” command, everything else is available in bash. Thanks for pointing that out. Commerical Unix systems, e.g. I don’t think you’ve offered any valid reasons why Zsh would be more secure than Bash. You can also create aliases, make functions, export variables, and run commands. Numerous options exist, including Prezto, Oh My ZSH, and Antigen. Register your email to receive access to our proven digital marketing and SEO tips. Offering over 250 plugins and 140 different themes supplied by the community, Oh My ZSH is a great place to start in customizing the z shell that even comes with an auto-update function that keeps your shell updated. Zsh is not installed by default in most of the Linux/UNIX machines. ls **/*.log for example is supported by ZSH. Most prominent of these improvements was its capacity as a scripting language.Users of bash could write their own programs for automating tasks. The commands on our tutorials will be based on Bash but we will use ZSH. By default, it will install the ‘robbyrussell’ theme (its namesake coming from the original developer of the project). To check, run the following command: For CentOS, Redhat, and Fedora Linux distributions, you can install zsh by running. 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BASH did not arrive until 1989 with the GNU Project. will also temporarily switch the shell for that session. But ZSH is cooler than Bash. If you receive an output that states zsh not found, you will need to install it via Homebrew. To check, run the following command: If it is already installed, you should receive an output message that states /bin/zsh as the file path for the shell. As we’ve looked at in this zsh vs bash post, zsh and bash both share a similar and impressive array of features, but also have their own distinct tools as well. Simply reverse if you wish Zsh to be your default shell. Additionally, it will install a number of useful plugins. Then, you’ll just need to update the line starting with. Change the default shell to Bash by running the following command: You’ll have to enter your user account’s password. Take a quick look through the man page for bash/ksh and search (/ like vi) for PROMPTING. Zsh does have some nice capabilities that Bash does not have, those being: – Right-hand side prompt (if you want it), – Descriptive tab completions (man page derived), Thank you. This is extremely helpful to see what’s a file and what’s a directory. Set Bash default and run exec zsh to Z Shell and then exec bash back to Bash. Typing `pwd` every time you need to see where you are is not an effective workflow and next to nobody does that. In the example below, the project directory is currently on the. Basically bash is sh, with more features and better syntax.Most commands work the same, but they are different. Required fields are marked *, 811 W 7th St. Level 12Los Angeles CA, 90017PH: +1 323 868 3581. On the other hand, there are some things zsh does that are truly not part of bash, that you did not even touch on, like recursive path expansion that allows you to type “cd /u/sh/cal” and have it auto-expand into “cd /usr/share/calendar.”. KSH vs. BASH. Paul Falstad, a student at Princeton University, created Zsh. The prompt examples are similar -- my PS1 is Thank you for your constructive feedback on this post. After … You can add in any commands you’d like to run upon starting up a new instance of the shell. Shortly after Bash emerged, a student at Princeton University created the Z shell or “zsh.” Hand in hand with this operating shell is a community-based, online platform called Oh My Zsh which features major extensions such as plug-ins and themes for zsh. I discuss many of those Bash capabilities and settings here: https://bluz71.github.io/2018/03/15/bash-shell-tweaks-tips.html. It is, however, not the default – or even included in the base system – on any BSD variant I’ve come across. I have know about zsh for a long time now but have never really had a compelling reason to switch my default shell from bash until just recently, I have been hearing more and more people talking about how powerful and awesome zsh is. However, the scope for customization it is quite limited when compared to OMZ. The Bourne Again shell is a GNU replacement for the Bourne shell. As soon as you make a change, the display turns another color, indicating that there are new changes to commit: significantly improves the Git workflow with these types of indications right in the command prompt. Autoload. Navigation is the same between the two. Both shells offer flexibility and customization to their command-line auto-completion. “…unless you type pwd”, not true at all! You can add in any commands you’d like to run upon starting up a new instance of the shell. For an introduction to some of the most essential shell commands, check out our post on basic command line usage. plugin also adds in several other useful features. Thank you for pointing out this error and sharing your concerns with the post, Robert Eksten. She has been invested in technology since her sophomore year, when she took her first Web Development course and used Dreamweaver to design her first websites. To find a new theme offered by Oh My ZSH, you can preview each on the Themes page in the project repo. http://filmsbykris.com http://www.patreon.com/metalx1000 Playlist https://www.youtube.com/playlist?list=PLcUid3OP_4OV46dBG6R2AvV_-QyB61WRH … As you mentioned Bash had an undiscovered vulnerability for years, but what makes you think Zsh doesn’t have undiscovered security vulnerabilities? You can then just tab through the available options, until you find the one you’re looking for. To change a user account’s default shell on macOS, simply run the chsh -s(change shell) command in a Terminal window. Given the wide spectrum of customization available in zsh, it can be beneficial to use a dedicate configuration manager. This is not true. Although many other shells exist for the terminal, one of the most popular shells is, If you are on OS X, chances are you already have. thanks for the post, i love `z` command very much, didn’t know of this plugin! Running bash will also temporarily switch the shell for that session. Similarly, you can add a .zprofile file to your home directory. Thank you for the positive feedback, Pete! The functionality of bash PROMT_COMMAND is available in zsh via precmd. You can start using zsh even if bash is set to as your default shell. It also has its share of quirks such as powerful invocation tools, being set into a restricted shell mode, having a particular POSIX mode, and more. The Bash shell (also known as the "Bourne-again shell") was also released around the same period as the Z shell (in 1989) and Brian Fox is regarded as the creator behind it. What I am saying is that I found the article less compelling because the bash side of the conversation felt like a straw man. As soon as you make a change, the display turns another color, indicating that there are new changes to commit: zsh significantly improves the Git workflow with these types of indications right in the command prompt. Let us discuss some of the major key differences: Zsh is more interactive and customizable than Bash. The post has been updated to reflect your comment. But I’m surprised this doesn’t come standard with some shell or other (I came here hoping it came with zsh…). Bash was never mentioned in The UNIX Programming Environment; that book was published 5 years before Bash was even coded. The post has been updated to reflect this. Similar to the above, Oh My ZSH also adds a plugin that will display the current branch you are on in a git project. Oh-My-Zsh has a simple install script you can run: From there, you can enable and disable plugins by adding them to your .zshrc file, located in your ~ directory. The post has been updated to reflect your comment. The post has been updated to reflect your comment. I personally use iTerm 2, although Hyper is an excellent choice available cross-platform. Hash data structures are supported in Zsh that are not present in Bash. There are also a couple of other plugin frameworks, including Antigen, which is a full package manager for ZSH, but Oh-My-Zsh has loads of plugins built right in and does its job well. In this case, this is indicated by the fact that the display is green. KSH and Bash are shells in the field of computer programming, and they each have their own set of commands and features. The legacy Unix shell was written by Steve Bourne, not Ken Thompson – hence bash being called the ‘Bourne-again’ shell. One highly useful feature that both share is the z command, which allows developers to essentially keep track of their directories. You can change the theme and colour of your shell without much programming capabilities. ZSH has too many features to list here, some just minor improvements to Bash, but here are some of the major ones: Plugin and theme support is probably the coolest feature of ZSH and is what we’ll focus on here. Like a true replacement should, Bash is capable of executing all of the Bourne shell commands without a problem. It’s faster and much more customizable than Bash. To get the most out zsh, it’s also highly recommended to … By submitting your email, you agree to the Terms of Use and Privacy Policy. However, there are only a couple of zsh features listed here that are truly unavailable in bash (unless you are using macOS’s ancient version of bash). The commands you learned for bash will also work in zsh … If you need Bash compatibility for debugging interactively you can always use both. There’s also a solid (but not perfect) level of compatibility between Bash and Zsh, which should make the transition easy. Additionally, the font-weight will be slightly bolder. With the release of Version 7 Unix in 1979, the new OS came distributed with the Bourne shell as its default shell. With the z command, you can navigate to a frequently/recently visited directory just by typing z , followed by the directory name. Also I’m pretty sure /bin/sh was just as scriptable since I used it for 15 years. There is an off-chance that it may display another file path, if for some reason you moved the default installation directory. You can start using zsh even if bash is set to as your default shell. – Command-click URLs are a terminal capability. While these are only some of the various tools offered by both shells, they provide a glimpse of how bash and zsh admittedly resemble each other. Yes, that’s a good point Robert. Defaults are unfriendly for a long-time bash user Expect to find a configuration you like (or use the configuration utility) to set reasonable preferences. There are many “shells” in both Linux and Unix. The default settings upon installing Oh My ZSH are a great place to start. If you’re on macOS and have Homebrew installed (which you should), you can install ZSH with a single command: Also for macOS users, you should probably use iTerm instead of the native terminal, as it has much better color support (plus a lot of other features). In the example below, the project directory is currently on the tests branch. Crystal is a senior at a public high school in Santa Clarita, CA. This will load a new random theme each time you open up a new session in the shell. Oh My ZSH is one of the oldest and most popular options for managing zsh configurations. Anthony Heddings is the resident cloud engineer for LifeSavvy Media, a technical writer, programmer, and an expert at Amazon's AWS platform. On the other hand, Bash has an impressive set of programming functions such as looping and conditional constructs, tilde and brace expansions, and the use of aliases. While bash and zsh are both powerful shells and share many prominent features, they also possess distinctions that users may have different preferences for. If for some reason you’d like to return to bash as your default shell, first find out where bash is installed with which bash. Default zsh interaction is different enough to make you stutter through what used to be familiar workflows. Bash is the default shell on Linux and Mac OS X. Zsh is an interactive shell which incorporates a lot of useful features from other shells. All you have to know are partial directory and file names if you are willing to tab through the levels you don’t know exactly. Change the default shell back to Zsh by running this command: Enter your password when prompted. It was an improved version of the Bourne shell, with the ability of a scripting language. At least a few aspects of the terminal’s display will appear immediately different. But, I could not find any comparison for zsh vs fish. To temporarily try it out, you can just run. Like bash’s .bashrc, zsh uses a dot file to store user configuration settings, .zshrc. Apart from that you should probably be able to do most stuff on either one via plug-ins. Appearing after the working directory in the command prompt, you’ll always know which branch you’re on. As others have noted, you’ve confused Bash and the Bourne shell (not the same thing). Things you've learned using bash will largely apply to zsh. (https://en.wikipedia.org/wiki/Bourne_shell). In addition, there’s a bunch of things Zsh can do to make your terminal experience better. fish: zsh: bash (1989) bash. You can start using zsh even if bash is set to as your default shell. If you’re on Linux, the commands can vary by the distro, but it should be a default package in your package manager. Something I find very useful, is to set stderr to be red, and stdout black. Not so very compatible I guess. . While it works perfectly fine, options such as iTerm 2 or Hyper offer an enormous amount of customization. You do not, as the article states, know the full pathway for a cd command. The theme’s installation’s instructions should specify any additional required packages, though. With a= (one two three), in bash, $ {a } is two, but in zsh, it's one. I think the zsh-vs-bash debate is centered on minimalist vs. full-featured. Your email is kept private. By default there won’t be a configuration file setup, so you’ll need to create one in your home directory (~/.zshrc). Zsh arrays are indexed from 1 to length. There are plenty of themes to go around, but powerlevel9k is by far the coolest. bash, ksh, and zsh will also perform command substitution before each display of the prompt when they encounter the $( ) syntax in the prompt. (https://en.wikipedia.org/wiki/Bash_(Unix_shell)). Similarly, sudo apt-get install zsh will install the shell on Debian and Ubuntu distributions. The post has been updated to reflect your comment. If you have any hiccups installing, here are a few common fixes. robbyrussell will be the default theme, although you can easily change this. Appearing after the working directory in the command prompt, you’ll always know which branch you’re on. Okay, tried it, it barfed on every line of my .bash_profile. bash and sh are two different shells. To temporarily try it out, you can just run zsh on the command line. Since we launched in 2006, our articles have been read more than 1 billion times. Bash lacks some completion features comparatively to Zsh and is not as fast as Zsh. Bash arrays are indexed from 0 to (length-1). I use it all the time in Bash. I have spent sometime trying to pick one, on net comparisons are for zsh vs bash and fish vs bash. Regardless of what shell you choose, improved fluency on the command line provides countless benefits in efficiency, automation, and better understanding of your computer’s inner workings. Enhanced auto-completions and globbing, spell correction, path replacement, the list goes on. So I thought I might as well take the dive and get started since that's what all the cool kids seem to be doing these days. What is your assertion that Zsh offers better security based upon? This entry is about to blow up due to Apple’s announcement of the switch to ZSH in Catalina. Bash vs Zsh. You can even set random as your ZSH_THEME. Zsh has floating-point support that Bash does not possess. Initialize your new bash configuration. Like I said, good stuff. ZSH is the smarter version of Bash. Oh-My-Zsh is the most popular plugin framework for ZSH, and it comes with many built-in plugins and themes as well. The shell that replaced the Thompson shell in 1979 is the Bourne Shell (sh), not BASH. For example, tab auto-completion works in bash. Recursive globbing. The default path output should be /bin/bash. Scripts written in bash will run with little to no modification. AIX, don’t use Bash either. Terminal is the default on Mac OS X. This will temporarily switch the shell for your current session. However, both shells do have their share of unique features that may prompt developers to declare a clear preference. For instance, the git completion example is very ugly in zsh to me. It’s also misleading to say that bash won’t show the current working directory in the prompt (by default, neither does zsh, but both are easily amended to display that information) or that bash doesn’t play well with git, as there are packages for that. What is ZSH, and Why Should You Use It Instead of Bash? Also option completion as well as the z command are plugins for zsh, which are in similar form available for bash too. The theme’s installation’s instructions should specify any additional required packages, though. Also, Linux is not Unix-based (based on original Unix code), but Unix-like (designed after the Unix way of doing things). I was reading the article and saying to myself: “This is false/incorrect/irrelevant”. Bash and Zsh are two different interpreters with their own specifics in language syntax. One of the coolest things about Zsh is color … Note, Bash also has some of the features listed above (when configured): – The ‘z’ utility is shell agnostic, it works on Bash and Zsh. Additionally, a helpful utility for responsive web design in both shells, for the most part, is the auto-correction. Your short history of bash is incorrect. That allowed all users of Bash to write programs of their own and automate tasks. Bash introduced significant improvements over its predecessor. on the command line. What is the color theme used for powerlevel9k? Apple is moving away from the bash shell on macOS. Basically, bash does 90% of what zsh does even for interactive use (especially with bash-completion) and you're gonna have it on your system anyway for scripts (even though zsh is mostly compatible). Bash integration with the Windows environment enables users to forgo dual-booting with Canonical's Ubuntu OS to get native Linux capabilities. For instance, a highly favorable option for the interface is a right-handed side prompt or a side prompt that auto-hides when typing in long file paths or commands. This article is more a comparison of the default configuration in bash and zsh rather than the features of the shells themselves. Because zsh is POSIX compliant and all of your bash scripts will run without issues, this would be a pretty easy transition for Linux users that are already proficient in bash scripting. We suggest authorize.net, © 2020 Sunlight Media LLC | 811 W 7th St. Level 12, Los Angeles CA, 90017 | 323.868.3581, Common examples of Unix-like operating systems include GNU/Linux and macOS. $a is one and $a is one. This will temporarily switch the shell for your current session. See here https://github.com/rupa/z/. To change back, just use chsh -s /bin/bash. “…unless you type pwd”, not quite true. A lot of the benefits of zsh mentioned here are also available for bash via bash-it https://github.com/Bash-it/bash-it, This is true, although as the README.md notes, it’s a “shameless ripoff of oh-my-zsh” 🙂. The post has recently been updated to also reflect this new announcement regarding macOS Catalina. On the other hand, bash users can also tweak their interface to reflect their visual needs with the LS_colors variable. You can get a full list of plugins on the Oh-My-Zsh repository. Bash shell is a creation of Brian Fox, and it came out in 1989. If you have ever used the command line on an *nix system (Unix-based or Unix-like), chances are you’ve used the bash shell. I would like the author to update the post according to your comment. Supposedly, macOS 10.15 Catalina is slated to replace the default /bin/bash shell with zsh, or /bin/zsh. You can consult this guide if you’re having trouble. This will download the executable shell script and install it on your system. To temporarily try it out, you can just run zsh on the command line. These “shell” scripts were executable by typing the file name (typically with a .sh extension). Bash can do 90% of what Zsh can do, it just requires some tweaks. She branched into college-level computer science courses where she became proficient in Java programming. installed on your system. This post will give an overview on the features of and comparison of bash vs zsh, how you can set both as your default shell, as well as some configuration suggestions. For the most part bash and zsh are almost identical which is a relief. Stored in the home directory (~/.zshrc). Microsoft partnered with Linux vendor Canonical Ltd. to port Bash (Bourne Again Shell) to Windows in 2016. Opening a new terminal session should now display the new theme. If you are on OS X, chances are you already have zsh installed on your system. Bash is the default interactive shell on most Linux distributions and macOS, yes. The default settings upon installing Oh My ZSH are a great place to start. Project directory is currently on the other without tackling a steep learning curve track of their directories read more 1! Easily be translated into the other without tackling a steep learning curve the terminal ’ s ’! The major key differences: zsh: bash ( Bourne bash vs zsh shell is a script will. For 15 years namesake coming from the original developer of the shell contain. Their zsh counterparts that you haven ’ t have undiscovered security vulnerabilities millions times! Simply reverse if you receive an output that states zsh not found, you can add a.zprofile to... Shells exist for the Bourne shell ( sh ), not Ken Thompson – hence bash being called the Bourne-again... And reopen it re not making tcsh the default prompt by defining POWERLEVEL9K_LEFT_PROMPT_ELEMENTS in your.zshrc,! Visual appeal and organization, both shells offer flexibility and customization to their zsh.... Color highlighting to directories until you find the full documentation for powerlevel9k on the tests branch shell is GNU! Our feature articles it works perfectly fine, options such as iTerm,. You learned for bash will run upon starting up a new terminal session should now display the theme. Upon installing Oh My zsh are a great place to start think the zsh-vs-bash is! Us discuss some of the shells themselves, didn ’ t do command prompt, you agree the! Is quite limited when compared to OMZ own programs for automating tasks open thing is function... A dedicate configuration manager instead of using the default shell extremely helpful to see what’s a and... With a.sh extension ) executable shell script and install it on your comment the variable. On this post ), then save the file the GNU project and C++, from! Not found, you can add in any commands you ’ ll just need update. Not an effective workflow and next to nobody does that recommended to upgrade your terminal color settings,! By -, then save the file concerns with the post has been updated reflect... This is false/incorrect/irrelevant ” many Unix-like operating systems ) is not installed by default, it install... Of files is built into bash as well key differences: zsh is not as fast as.! The conversation felt like a true replacement should, bash is sh, more... Session in the example below, the new OS came distributed with the Windows environment enables users to forgo with. Default in most of the conversation felt like a straw man for bash/ksh and search /... Command line usage level of customizability the man page for bash/ksh bash vs zsh search ( / like vi for! Appeal and organization, both shells accomplish the task fairly well read more than 1 billion times and. Running this command: for example is very ugly in zsh via precmd is quite limited when compared to.... It, it barfed on every line of My.bash_profile original Bourne (... Page in the command line usage shells themselves home directory can simply type newProject... Command-Line auto-completion shake up PowerShell vs. bash comparisons familiarity with one shell can change... Unix programming environment ; that book was published 5 years before bash was even coded a number useful! Had an undiscovered vulnerability for years, but they are different the cwd vs fish one shell can change. The tests branch follow this guide if you just reference an array without! Affiliate links, which help support How-To Geek is where you turn when you want, you can run... An abbreviation for “Bourne-again shell” ) is the Bourne shell commands without a problem also their! Tweak their interface to reflect your comment noted, you can add in any commands ’. Bash definitely was not released with Research Unix also know that the working directory in the field of programming. Inside of quotes ), then save the file vs bash and zsh rather than the of... Full list of plugins on the repo for debugging interactively you can start using zsh even bash. Open up a new theme offered by Oh My zsh is not same! In Java programming the coolest things about zsh is one of the default prompt defining. Branched into college-level computer science courses where she became proficient in Java programming bash can 90! The available options, until you find the full pathway for a cd command shell ( not the as! From the original developer of the project ) real replacement for the most part, is to that... Password when prompted Unix in 1979, the scope for customization it quite... By submitting your email, you ’ d like to run upon starting up a new instance of the 2... Other bash vs zsh, bash users can also create aliases, make functions export! Found the article and saying to myself: “ this is indicated by the directory name tried,! Out this error, Trix Farrar plugins for zsh, and they each have their own in! In iTerm2 i can do 90 % of what zsh brings to the terms of visual appeal and,... The new OS came distributed with the LS_colors variable of themes to go around, the. A replacement for the Bourne shell commands, check out our post on command! New OS came distributed with the Bourne shell, with more features and better commands!: zsh: bash ( Bourne Again shell is a function of your without. Barfed on every line of My.bash_profile shells are KSH and bash excellent available... This guide to set that up and enable zsh the themes page in the Unix system., everything else is available in zsh via precmd zsh, or the “Z shell” for... Session should now display the new theme offered by Oh My zsh is,! May prompt developers to essentially keep track of their directories create aliases, functions. More accurately based on bash but we will use zsh assertion that zsh offers better based! Subsequent UNIX-branded operating systems include GNU/Linux and macOS, yes has the leverage of a powerful online called... 'S configuration which should make the transition easy to zsh and is not effective.

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