Writing a shell script is like riding a bike. You fall off and scrape your knees a lot at first. With a bit more experience, you become comfortable riding them around town, but also quickly discover why most people drive cars for longer trips.
The agent silently authenticates with Intune services before checking in to receive assigned shell scripts for the macOS device. The agent receives assigned shell scripts and runs the scripts based on the configured schedule, retry attempts, notification settings, and other settings set by the admin. (Although, oddly enough, this script has worked some of the time.) SUB2 does not belong in /dest/Archived Projects/Development/ at all. SUB2 should be nested inside of SUB1, which should be nested inside of the project folder. My questions. What shell command would move a folder and preserve its internal structure? Apr 30, 2020 Why shell scripts are easier to run on macOS. If we compare it to Windows 10 Shell scripts are quite easy to run on macOS. It’s just because macOS is based on UNIX. As the system has in common with a Linux system. Shell commands will execute without issue or problem. Also, you can easily use a few apps Linux apps too as you like advantage. MacOS Catalina still has the same /bin/bash (version 3.2.57) as Mojave and earlier macOS versions. This change is only for new accounts created on macOS Catalina. When you upgrade to Catalina, a user’s default shell will remain what it was before. Many scripts in macOS, management systems, and Apple and third party installers rely on /bin. Mar 10, 2014 Shell scripting is generally considered to be a glue language, ideal for creating small pieces of code that connect other tools together. While shell scripts can be used for more complex tasks, they are usually not the best choice.
Shell scripting is generally considered to be a glue language, ideal for creating small pieces of code that connect other tools together. While shell scripts can be used for more complex tasks, they are usually not the best choice.
Handbrake download for mac yosemite. If you have ever successfully trued a bicycle wheel (or paid someone else to do so), that’s similar to learning the basics of shell scripting. If you don’t true your scripts, they wobble. Put another way, it is often easy to write a script, but it can be more challenging to write a script that consistently works well.
This chapter and the next two chapters introduce the basic concepts of shell scripting. The remaining chapters in this document provide additional breadth and depth. This document is not intended to be a complete reference on writing shell scripts, nor could it be. It does, however, provide a good starting point for beginners first learning this black art.
Shell Script Dialects
There are many different dialects of shell scripts, each with their own quirks, and some with their own syntax entirely. Because of these differences, the road to good shell scripting can be fraught with peril, leading to script failures, misbehavior, and even outright data loss.
To that end, the first lesson you must learn before writing a shell script is that there are two fundamentally different sets of shell script syntax: the Bourne shell syntax and the C shell syntax. The C shell syntax is more comfortable to many C programmers because the syntax is somewhat similar. However, the Bourne shell syntax is significantly more flexible and thus more widely used. For this reason, this document only covers the Bourne shell syntax.
The second hard lesson you will invariably learn is that each dialect of Bourne shell syntax differs slightly. This document includes only pure Bourne shell syntax and a few BASH-specific extensions. Where BASH-specific syntax is used, it is clearly noted.
The terminology and subtle syntactic differences can be confusing—even a bit overwhelming at times; had Dorothy in The Wizard of Oz been a programmer, you might have heard them exclaim, 'BASH and ZSH and CSH, Oh My!' Fortunately, once you get the basics, things generally fall into place as long as you avoid using shell-specific features. Stay on the narrow road and your code will be portable.
Some common shells are listed below, grouped by script syntax:
Bourne-compatible shells
sh
bash
zsh
ksh
C-shell-compatible shells
csh
tcsh
bcsh
(C shell to Bourne shell translator/emulator)
Many of these shells have more than one variation. Most of these variations are denoted by prefixing the name of an existing shell with additional letters that are short for whatever differentiates them from the original shell. For example:
- The shell
pdksh
is a variant ofksh
. Being a public domain rewrite of AT&T'sksh
, it stands for 'Public Domain Korn SHell.' (This is a bit of a misnomer, as a few bits are under a BSD-like open source license. However, the name remains.) - The shell
tcsh
is an extension ofcsh
. It stands for the TENEX C SHell, as some of its enhancements were inspired by the TENEX operating system. - The shell
bash
is an extension ofsh
. It stands for the Bourne Again SHell. (Oddly enough, it is not a variation ofash
, the Almquist SHell, though both are Bourne shell variants. This should not be confused with thedash
shell—anash
-derived shell used in some Linux distributions—whose name stands for the Debian Almquist SHell.)
And so on. In general, with the exception of
csh
and tcsh
, it is usually safe to assume that any modern login shell is compatible with Bourne shell syntax.Note: Because the C shell syntax is not well suited to scripting beyond a very basic level, this document does not cover C shell variants in depth. For more information, see About the C Shell.
Shell Scripting For Mac Os
About the C Shell
The C shell is popular among some users as a shell for interacting with the computer because it allows simple scripts to be written more easily. However, the C shell scripting language is limited in a number of ways, many of which are hard to work around. For this reason, use of the C shell scripting language for writing complex scripts is not recommended. For more information, read “CSH Programming Considered Harmful” at http://www.faqs.org/faqs/unix-faq/shell/csh-whynot/. Although many of the language flaws it describes are fixed by some modern C shells, if you are writing a script that must work on multiple computers across different operating systems, you cannot always guarantee that the installed C shell will support those extensions.
However, the C shell scripting language has its uses, particularly for writing scripts that set up environment variables for interactive shell environments, execute a handful of commands in order, or perform other relatively lightweight chores. To support such uses, the C shell syntax is presented alongside the Bourne shell syntax within this 'basics” chapter where possible.
Outside of this chapter, this document does not generally cover the C shell syntax. If after reading this, you still want to write a more complex script using the C shell programming language, you can find more information in on the C shell in the manual page for
csh
.Shell Variables and Printing
What follows is a very basic shell script that prints “Hello, world!” to the screen:
The first thing you should notice is that the script starts with ‘
#!
’. This is known as an interpreter line. If you don’t specify an interpreter line, the default is usually the Bourne shell (/bin/sh
). However, it is best to specify this line anyway for consistency.The second thing you should notice is the
echo
command. The echo
command is nearly universal in shell scripting as a means for printing something to the user’s screen. (Technically speaking, echo
is generally a shell builtin, but it also exists as as standalone command, /bin/echo
. You can read more about the difference between the builtin version and the standalone version in echo and Use Shell Builtins Wherever Possible.)If you’d like, you can try this script by saving those lines in a text file (say “hello_world.sh”) in your home directory. Then, in Terminal, type:
Of course, this script isn’t particularly useful. It just prints the words “Hello, world!“ to your screen. To make this more interesting, the next script throws in a few variables.
Type or paste this script into the text editor of your choice (see Creating Text Files in Your Home Directory for help creating a text file) and save the file in your home directory in a file called
test.sh
.Once you have saved the file in your home directory, type ‘
chmod a+x test.sh
’ in Terminal to make it executable. Finally, run it with ‘./test.sh leaders
’. You should see “Hello, world leaders!” printed to your screen.This script provides an example of a variable assignment. The variable
$1
contains the first argument passed to the shell script. In this example, the script makes a copy and stores it into a variable called FIRST_ARGUMENT
, then prints that variable.You should immediately notice that variables may or may not begin with a dollar sign, depending on how you are using them. If you want to dereference a variable, you precede it with a dollar sign. The shell then inserts the contents of the variable at that point in the script. For all other uses, you do not precede it with a dollar sign.
Important: You generally do not want to prefix the variable on the left side of an assignment statement with a dollar sign. Because
would be expanded by the shell into the following complete gibberish:This is clearly not what you want (and produces an error). Because of the order in which the statement is evaluated, the above assignment statement would still fail with an error even if FIRST_ARGUMENT
starts out empty, if you used a dollar sign, the first line:FIRST_ARGUMENT
were nonempty. (If you really want to assign a value to a variable whose name is in a different variable, use eval
, as described in Using the eval Builtin for Data Structures, Arrays, and Indirection.)You should also notice that the argument to echo is surrounded by double quotation marks. This is explained further in the next section, Using Arguments And Variables That Contain Spaces.
C Shell Note: The syntax for assignment statements in the C shell is rather different. Instead of an assignment statement, the C shell uses the
The functional difference between set
and setenv
builtins to set variables as shown below:set
and setenv
is described in Exporting Shell Variables.Using Arguments And Variables That Contain Spaces
Take a second look at the script from the previous section:
Notice that the echo statement is followed by a string surrounded by quotation marks. Normally, the shell uses spaces to separate arguments to commands. Outside of quotation marks, the shell would treat “Hello,” and “world” as separate arguments to
echo
.By surrounding the string with double quote marks, the shell treats the entire string as a single argument to
echo
even though it contains spaces.To see how this works, save the script above as
test.sh
(if you haven’t already), then type the following commands:The first line above prints “Hello, world leaders!” because the space after “leaders” ends the first argument (
$1
). Inside the script, the variable $1
contains “leaders”, $2
contains “and”, and $3
contains “citizens”.The second line above prints “Hello, world leaders and citizens!” because the quotation marks on the command line cause everything within them to be grouped as a single argument.
Notice also that there are similar quotation marks on the right side of the assignment statement:
With most modern shells, these double quotation marks are not required for this particular assignment statement (because there are no literal spaces on the right side), but they are a good idea for maximum compatibility. See Historical String Parsing in Historical Footnotes and Arcana to learn why.
When assigning literal strings (rather than variables containing strings) to a variable, however, you must surround any spaces with quotation marks. For example, the following statement does not do what you might initially suspect:
If you type this statement, the Bourne shell gives you an error like this:
The reason for this seemingly odd error is that the assignment statement ends at the first space, so the next word after that statement is interpreted as a command to execute. See Overriding Environment Variables for Child Processes (Bourne Shell) for more details.
Instead, write this statement as:
Using quotation marks is particularly important when working with variables that contain filenames or paths. For example, type the following commands:
The above example creates a directory in
/tmp
called “My Folder”. (Don’t worry about deleting it because /tmp
gets wiped every time you reboot.) It then attempts to list the files in that directory. The first time, it uses quotation marks. The second time, it does not. Notice that the shell misinterprets the command the second time as being an attempt to list the files in /tmp/My
and the files in Folder
.Handling Quotation Marks in Strings
In modern Bourne shells, expansion of variables, occurs after the statement itself is fully parsed by the shell. (See Historical String Parsing in Historical Footnotes and Arcana for more information.) Thus, as long as the variable is enclosed in double quote marks, you do not get any execution errors even if the variable’s value contains double-quote marks.
However, if you are using double quote marks within a literal string, you must quote that string properly. For example:
C Shell Note: The C shell handling of backslashes within double-quoted strings is different. In the C shell, the previous example should be changed to:
to achieve the desired effect. This difference is described further in Parsing, Variable Expansion, and Quoting.This quoting technique also applies to literal strings within commands entered on the command line. For example, using the script from earlier in Shell Variables and Printing, the command:
prints the phrase “Hello, world “leaders”!”
The details of quotes as they apply to variable expansion are explained in Parsing, Variable Expansion, and Quoting. (Variable safety with shells that predate this behavior is generally impractical. Fortunately, the modern behavior has been the norm since the mid-1990s.)
Shell scripts also allow the use of single quote marks. Variables between single quotes are not replaced by their contents. Be sure to use double quotes unless you are intentionally trying to display the actual name of the variable. You can also use single quotes as a way to avoid the shell interpreting the contents of the string in any way. These differences are described further in Parsing, Variable Expansion, and Quoting.
Exporting Shell Variables
One key feature of shell scripts is that variables are typically limited in their scope to the currently running script. The scoping of variables is described in more detail in Subroutines, Scoping, and Sourcing. https://browncapital676.weebly.com/macos-81-rom-for-basilisk-2.html. For now, though, it suffices to say that variables generally do not get passed on to scripts or tools that they execute.
Normally, this is what you want. https://browncapital676.weebly.com/8-macos-like-docks-for-ubuntu-fossmintfossmint-amp.html. Most variables in a shell script do not have any meaning to the tools that they execute, and thus represent clutter and the potential for variable namespace collisions if they are exported. Occasionally, however, you will find it necessary to make a variable's value available to an outside tool. To do this, you must export the variable. These exported variables are commonly known as environment variables because they affect the execution of every script or tool that runs but are not part of those scripts or tools themselves.
A classic example of an environment variable that is significant to scripts and tools is the
PATH
variable. This variable specifies a list of locations that the shell searches when executing programs by name (without specifying a complete path). For example, when you type ls
on the command line, the shell searches in the locations specified in PATH
(in the order specified) until it finds an executable called ls
(or runs out of locations, whichever comes first).The details of exporting shell variables differ considerably between the Bourne shell and the C shell. Thus, the following sections explain these details in a shell-specific fashion.
Using the export Builtin (Bourne Shell)
Generally speaking, the first time you assign a value to an environment variable such as the
PATH
variable, the Bourne shell creates a new, local copy of this shell variable that is specific to your script. Any tool executed from your script is passed the original value of PATH
inherited from whatever script, tool, or shell that launched it.With the BASH shell, however, any variable inherited from the environment is automatically exported by the shell. Thus, in some versions of OS X, if you modify inherited environment variables (such as
PATH
) in a script, your local changes will be seen automatically by any tool or script that your script executes. Thus, in these versions of OS X, you do not have to explicitly use the export
statement when modifying the PATH
variable.Because different Bourne shell variants handle these external environment variables differently (even among different versions of OS X), this creates two minor portability problems:
- A script written without the
export
statement may work on some versions of OS X, but will fail on others. You can solve this portability problem by using theexport
builtin, as described in this section. - A shell script that changes variables such as
PATH
will alter the behavior of any script that it executes, which may or may not be desirable. You can solve this problem by overriding thePATH
environment variable when you execute each individual tool, as described in Overriding Environment Variables for Child Processes (Bourne Shell).
To guarantee that your modifications to a shell variable are passed to any script or tool that your shell script calls, you must use the
export
builtin. You do not have to use this command every time you change the value; the variable remains exported until the shell script exits.For example:
Either of these statements has the same effect—specifically, they export the local notion of the
PATH
environment variable to any command that your script executes from now on. There is a small catch, however. You cannot later undo this export to restore the original global declaration. Thus, if you need to retain the original value, you must store it somewhere yourself.In the following example, the script stores the original value of the
PATH
environment variable, exports an altered version, executes a command, and restores the old version.If you need to find out whether an environment variable (whether inherited by your script or explicitly set with the
export
directive) was set to empty or was never set in the first place, you can use the printenv
command to obtain a complete list of defined variables and use grep
to see if it is in the list. (You should note that although printenv
is a csh builtin, it is also a standalone command in /usr/bin
.)For example:
The resulting variable will contain 1 if the variable is defined in the environment or 0 if it is not.
Overriding Environment Variables for Child Processes (Bourne Shell)
Because the BASH Bourne shell variant automatically exports all variables inherited from its environment, any changes you make to preexisting environment variables such as
PATH
are automatically inherited by any tool or script that your script executes. (This is not true for other Bourne shell variants; see Using the export Builtin (Bourne Shell) for further explanation.)While automatic export is usually convenient, you may sometimes wish to change a preexisting environment variable without modifying the environment of any script or tool that your script executes. For example, if your script executes a number of tools in
/usr/local/bin
, it may be convenient to change the value of PATH
to include /usr/local/bin
. However, you may not want child processes to also look in /usr/local/bin
.This problem is easily solved by overriding the environment variable
PATH
on a per-execution basis. Consider the following script:This script prints the value of the variable
MYVAR
. Normally, this variable is empty, so this script just prints a blank line. Save the script as printmyvar.sh
, then type the following commands:Notice that the assignment statement
MYVAR=7
applies only
to the command that follows it. The value of MYVAR
is altered in the environment of the command ./printmyvar.sh
, so the script prints the number 7. However, the original (empty) value is restored after executing that command, so the echo statement afterwards prints an empty string for the value of MYVAR
.Thus, to modify the
PATH
variable locally but execute a command with the original PATH
value, you can write a script like this:Using the setenv Builtin (C shell)
In the C shell, variables are exported if you set them with
setenv
, but not if you set them with set
. Thus, if you want your shell variable modifications to be seen by any tool or script that you call, you should use the setenv
builtin. This builtin is the C shell equivalent to issuing an assignment statement with the export
builtin in the Bourne shell.If you want your shell variables to only be available to your script, you should use the
set
builtin (described in Shell Variables and Printing). The set
builtin is equivalent to a simple assignment statement in the Bourne shell.Notice that the local variable version requires an equals sign (
=
), but the exported environment version does not (and produces an error if you put one in).To remove variables in the C shell, you can use the
unsetenv
or unset
builtin. For example:This will generate an error message. In the C shell, it is not possible to print the value of an undefined variable, so if you think you may need to print the value later, you should set it to an empty string rather than using
unset
or unsetenv
.If you need to test an environment variable (not a shell-local variable) that may or may not be part of your environment (a variable set by whatever process called your script), you can use the
printenv
builtin. This prints the value of a variable if set, but prints nothing if the variable is not set, and thus behaves just like the variable behaves in the Bourne shell.For example:
This prints
X is '
if the variable is either empty or undefined. Otherwise, it prints the value of the variable between the quotation marks.If you need to find out if a variable is simply empty or is actually not set, you can also use
printenv
to obtain a complete list of defined variables and use grep
to see if it is in the list. For example:The resulting variable will contain 1 if the variable is defined in the environment or 0 if it is not.
Overriding Environment Variables for Child Processes (C Shell)
Unlike the Bourne shell, the C shell does not provide a built-in syntax for overriding environment variables when executing external commands. However, it is possible to simulate this either by using the
env
command.The best and simplest way to do this is with the
env
command. For example:As an alternative, you can use the
set
builtin to make a temporary copy of any variable you need to override, change the value, execute the command, and restore the value from the temporary copy.You should notice, however, that whether you use the
env
command or manually make a copy, the PATH
variable is altered prior to searching for the command. Because the PATH
variable controls where the shell looks for programs to execute, you must therefore explicitly provide a complete path to the ls
command or it will not be found (unless you have a copy in /usr/local/bin
, of course). The PATH
environment variable is explained in Special Shell Variables.As a workaround, you can determine the path of the executable using the
which
command prior to altering the PATH
environment variable.Or, using
env
:The use of the backtick (`) operator in this fashion is described in Inline Execution.
Security Note:If your purpose for overriding an environment variable is to prevent disclosure of sensitive information to a potentially untrusted process, you should be aware that if you use
setenv
for the copy, the called process has access to that temporary copy just as it had access to the original variable. To avoid this, be sure to create the temporary copy using the set
builtin instead of setenv
.Deleting Shell Variables
For the most part, in Bourne shell scripts, when you need to get rid of a variable, setting it to an empty string is sufficient. However, in long-running scripts that might encounter memory pressure, it can be marginally useful to delete the variable entirely. To do this, use the
unset
builtin.For example:
The
unset
builtin can also be used to delete environment variables.C Shell Note: The C shell
unset
builtin is identical except that it cannot be used to delete environment variables. Use unsetenv
instead, as shown in Overriding Environment Variables for Child Processes (C Shell).Also, in C shell, if you try to use a deleted variable, it is considered an error. (In Bourne shell, an unset variable is treated like an empty string.) Free cd burning software for macbook pro.
Shell Script Macos Example
Copyright © 2003, 2014 Apple Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2014-03-10
macOS Catalina has a number of new features and capabilities, but one change that’s often overlooked is the new shell used in Terminal to interact with the Mac via the command line.
The quick take away is Apple is moving from the Bash (Bourne Again Shell) to a newer Zsh. In this Rocket Yard guide, we’ll look at how this change to Terminal and the command line affects you.
What is a Shell?
At the simplest level, a shell is a program that allows you to control a computer, in this case, a Mac, using commands you enter with the keyboard. Shells are usually interactive text-based interfaces that accept commands and present the results. There are a number of different shells you can use, but if you’re wondering why anyone would want to use a shell and a command line to control a computer, you need to take a trip back in time to the dawn of the computer age.
In those early days, controlling a computer was a daunting task that could require you to manually load memory locations, one at a time, with the data that would eventually be run as a program. In some cases, this was done by setting a row of switches that represented a memory location address, and then loading data into the memory with another set of switches. This process was labor-intensive and prone to errors.
In many cases, the manually loaded program was for a boot loader that allowed the computer to accept input from a paper tape reader.
Once the paper tape reader was operational, you could load a shell program that allowed a Teletype to be used as a command line interface. Ah, those were the days.
Using a shell and a command line was a lot easier for working with a computer than rows and rows of toggle switches.
Shell Scripts For Osx
OK, so the shell was a big improvement back then, but why is it still used today with modern computers?
The Shell and the Mac
The Mac makes use of a UNIX-like operating system. And like most Unix or Linux based systems, the command line interface is one of the key methods for interacting with the operating system. The Mac (and many UNIX and Linux systems) also features a graphical user interface to make working with the computer even easier. But the command line still exists, and for working with core components of the operating system it can be very versatile, providing more capabilities than what is available in the GUI (Graphical User Interface).
The shell controls how the command line is presented to the user and what features the command line supports. Most shells offer the following to some degree or other:
- Shell Syntax: How the shell understands what you enter.
- Shell Commands: The actual commands the shell can execute.
- Shell Functions: The ability to group commands together.
- Shell Parameters: How and where the shell stores values.
- Shell Expansion: How parameters in a command are expanded
- Redirect: Controls the input and output of commands.
- Command Execution: What happens when commands are run.
- Shell Scripts: The ability to run a file containing multiple shell commands.
Why is Apple Changing the Shell?
Apple is changing from the Bash shell to the Zsh (Z Shell). They haven’t said specifically why the change is occurring, but we can make some educated guesses.
Apple has been using the Bash shell since OS X Jaguar but hasn’t updated Bash since version 3.2 was released in 2007. To put that in perspective, the version of Bash used on your Mac was new when the first iPhone was introduced.
Apple is likely using the older version because the licensing for the Bash shell changed from GNU GPL 2 (General Public License) to GNU GPLv3, which includes restrictions that could cause problems for Apple.
Apple muddled along with the older version for quite a few years, but really, it’s time to move on to something more current.
The Zsh included with macOS Catalina is version 5.7.1 and is the most current version at the time of Catalina’s release. It is also uses a less restrictive MIT license that is more to Apple’s liking.
Note: Although Apple is changing to the Zsh in macOS Catalina, when running in Recovery Mode, the Bash shell is still used when you use the Terminal app.Am I Forced to Change the Shell?
Yes, and no. Apple will set the Zsh as the default for any new user account that is created in macOS Catalina or later. If you upgraded your Mac from an earlier version of the macOS, then those existing user accounts are still using the Bash shell.
You are, however, free to upgrade all accounts to Zsh, or downgrade an account to Bash (or for that matter, to any shell you wish to use).
How Different is Zsh?
Not very; Bash and Zsh have a very high level of compatibility between them. Both are based on the older Bourne shell. It’s likely most Bash commands and scripts you may be using will run just fine under the Zsh.
The real advantage to the Zsh is the modern features it includes that make working with the shell very easy. This includes auto complete of command entries, and spell checking, a favorite of mine since I often make a typo in a command that Bash would just let go through and then chide me about there being no such command, while Zsh offers to make a correction to my command for me.
For the fumble-fingered like me, that’s reason enough to change to the Zsh.
What About All My Bash Scripts?
They should run fine; if you do come across a script with issues caused by the shell, you can either take the time to upgrade the script, or simply add a Shebang (#!) to force the script to use the Bash shell that is still included with the macOS:
Add the following at the beginning of your Bash scripts to ensure compatibility:
#!/bin/bash
How to Temporarily Change Shells
Zsh has been included with the macOS for quite a while; it just was never the default before. If you would like to temporarily try out the Zsh, do the following:
Launch Terminal, located at /Applications/Utilities.
At the Terminal command prompt, enter:
zsh
Hit enter or return.
The shell being used in the current Terminal session will change to the Zsh and the command prompt will change to a percent sign (%).
You can return to the bash shell by either quitting Terminal, or at the prompt enter:
bash
Hit enter or return.
You can discover more about the Terminal app in the Rocket Yard guide:
Mac Os Run Shell Script
Tech 101: Introduction to the Mac’s Terminal App, Part One
Change The Default Shell to Use
No matter which shell Apple sets for you as the default, you can change it with one of two methods:
Shell Scripts For Macos Pc
From the Terminal command line, enter:
chsh -s /bin/zsh
or
chsh -s /bin/bash
Depending on whether you wish to set Zsh or Bash as the default.
Hit enter or return.
You can also set the default shell using System Preferences:
- Launch System Preferences, and select the Users & Groups preference pane.
- Click on the Lock icon in the bottom left corner, then supply your administrator password when requested.
- Right-click on the user account in the sidebar whose default shell you wish to change. From the popup menu, select Advanced Options.
- Locate the item labeled Login shell.
- Use the dropdown menu to select one of the available shells.
Click the OK button when ready.
Shell Scripts For Macos Windows 10
What About the Warning Message to Change to Zsh?
If you have Bash set as the default and you launch Terminal or open a new Terminal session, you will see the following message:
The default interactive shell is now zsh. To update your account to zsh, please run
chsh -s /bin/zsh
.If you intend to keep using Bash you can remove this message by entering the following at the command prompt:
export BASH_SILENCE_DEPRECATION_WARNING=1
Hit enter or return.
Terminal Script Mac
Shell Documentation
It’s beyond the scope of this single article to tell you about the various capabilities of each shell. To do so would really require a book, or two. If you would like to discover more about the Bash and Zsh, you can check out the online documentation about each.
- Z Shell information
- Bash information
Do you use the Terminal app often? And if so, what shell do you prefer to use? Let us know in the comments below.
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