Fixing "zsh: bad assignment" error in Linux
The other day I was trying to create an alias in Linux for repetitive commands. An alias is a name that is translated as another name or command (or a set of commands).
So, I tried to create the alias in the following manner:
And it threw me the following error:
If you are a regular user of the Linux command line, you must have identified the error on the previous command. But I was preoccupied with my program in C++ and I did not notice the obvious error here.
In fact, I thought it to be an error with the way I used the combination of error for the alias. So, I fiddled for a couple of minutes and just to make sure what I was doing wrong, tried this command:
Now, I was certain that there was no error with the commands this time but I git the same result as above:
And that’s when I realized my mistake. You see, I have been working a lot with C++ and was following the standard of using spaces before and after the assignment operator (=). And that is what I used here as well. And shell does not like the wastage of “space”.
I removed the extra white spaces before and after the = and voilà! There it worked like a charm.
In fact, the same error can be encountered with the export command as well or any other variable assignments in the shell. There should not be spaces before and after equals sign.
This taught me a lesson to not waste white space while dealing with shell scripts and Linux commands. It’s not the same as writing programs in other languages.
I would add this tiny learning lesson to my list of things to know about the Linux terminal.
I hope you would not have to waste your time with this problem if you mind those spaces before and after the equals sign.
Abhishek Prakash
Created It's FOSS 11 years ago to share my Linux adventures. Have a Master's degree in Engineering and years of IT industry experience. Huge fan of Agatha Christie detective mysteries 🕵️♂️
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[Fixed] Command Line zsh bad assignment error when setting an Alias – Alias
Quick Fix: When setting an alias, ensure there are no spaces around the = sign. For example, instead of alias foo = bar , use alias foo=bar .
The Problem:
When attempting to set an alias in the zsh terminal using the command alias pip = 'python3 -m pip' , the user encounters the error zsh: bad assignment . The same error occurs when the user tries to add the same line of code to their .zshrc file and refreshes their terminal.
The Solutions:
Solution 1: remove spaces around the equal sign.
The error is caused by spaces surrounding the = sign in the alias definition. To fix it, remove the spaces around the = , like this:
Solution 1: Add single quotes to the alias definition
In the command you’re using to define the alias, you’re missing single quotes around the value you’re assigning to the alias. The correct syntax is:
With the single quotes, the shell will correctly interpret the value you’re assigning to the alias, and the error should disappear.
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Error: ZSH_HIGHLIGHT_STYLES: assignment to invalid subscript range #359
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Why does echo “$USER:staff” throw zsh: bad substitution?
Puzzled because echo "PATH=$PATH:/usr/local/sbin" doesn’t (thought it had something to do with : ).
Also, in Bash, both commands work as I expected.
- Hint: foo=bar; echo "$foo:s/r/X/" – Kamil Maciorowski Mar 16, 2021 at 13:02
- @KamilMaciorowski Interesting... is that sed string substitution? So why does the $PATH command work? – sunknudsen Mar 16, 2021 at 14:42
- @glennjackman I believe I fixed the typo. – sunknudsen Mar 16, 2021 at 14:45
- 1 Because :/ is different than :s . I don't know Zsh good enough to write a decent answer though. – Kamil Maciorowski Mar 16, 2021 at 14:47
- @KamilMaciorowski Ok... I think I get it now... :s is interpreted as string substitution. – sunknudsen Mar 16, 2021 at 14:48
Because the :s after $USER is interpreted as an expansion modifier . You can see this clearly if you do the following:
And as you can see from the list above, :/ is not an expansion modifier.
Is it recommended to always use ${PATH} , ${USER} , etc... then?
No, it's usually fine to just use $USER , but sometimes, as you can see, it is required to use ${USER} . :)
However, regarding the code in your question, I can give you two other recommendations to use in Zsh:
- Use $path instead of $PATH and
- use print instead of echo .
- Yes, thanks for helping out Marlon! – sunknudsen Jul 12, 2022 at 11:09
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Cannot export variable thanks to a script with zsh
I have written a script export-zsh to set new variables in zsh
Errors occur if I run it
When I execute each command individually, it lead to no errors:
when I run source ~/.zshrc , there are no errors, so I don't think it should be directly related to my ~/.zshrc content but I give it below to be sure.
You script is executed by Bash. Reading your .zshrc with Bash doesn't work but gets you errors for all the Zsh specific stuff.
Your script runs in its own subshell. As settings, environment variables and such are not exported back to the calling shell ascript will not work here. Use a function instead and put it in your .zshrc :
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Open the file /Users/me/.zshrc [this is the file where you were trying to add the path for Python] Look for the line that is missing a '', and add that ''. [most likely it's going to be the line you added with Python], so look there first. Save your file and exit.
An alias is a name that is translated as another name or command (or a set of commands). So, I tried to create the alias in the following manner: alias my_short_command = "command 1; command 2 && command 3; command 4". And it threw me the following error: zsh: bad assignment. If you are a regular user of the Linux command line, you must have ...
mac使用ZSH后的各种问题解决1、安装maven 提示mvn command not found分析解决2、.zshrc 文件不存在，vim默认是新建？安装oh-my-zsh配置.zshrc3、什么brew 指令又command not found？安装Homebrew如果出现brew指令无法找到Homebrew基本使用4、安装zsh-autosuggestion插件出现超时？结语 1、安装 ...
Quick Fix: When setting an alias, ensure there are no spaces around the = sign. For example, instead of alias foo = bar, use alias foo=bar.
1. If you run your script with -x (both bash and zsh) you will see that the $ (...) code gets interpreted/parsed differently. This is because, as stated in the FAQ, word splitting in zsh is backwards/bash/sh incompatible.
From the zsh manual regarding the typeset builtin (which local is a special case of): Unlike parameter assignment statements, typeset 's exit status on an assignment that involves a command substitution does not reflect the exit status of the command substitution.
This is similar to #263 but I get a different error: (eval):15: bad assignment As a result, all plugin aliases are gone. I'm using the zsh calc plugin, which aliases the =. When I remove this plugin, I get no errors and got all plugin al...
foo=\ bar. proper assignment; now the value of foo is bar (note the leading space) foo-x=bar. command foo-x=bar (because foo-x is not a valid name for a shell variable) This is not specific to Zsh. The POSIX shell ( sh) and POSIX-compliant shells behave this way. Zsh (while not being POSIX-compliant in general) also follows.
The first issue is, that =foo.sh should get resolved first (absolute path of "foo.sh", if any), and then looked at by type.. The second minor issue appears to be that the suffix aliases setup by zsh-mime-setup should not get considered to be an alias, if they are a command/executable file maybe.
It sounds like you're asking zsh to interpret that script. You don't say what updateExpediaGitRepos is, but I suppose that alias sources that script, using the . or source builtin command. Those are the commands to tell the current shell interpreter to interpret code in a file, so the shebang (#! /bin/bash) is not relevant.The shebang is only used by the kernel when you try to execute a script.
zsh: bad subscript for direct array assignment: 0. Ask Question Asked 2 years, 2 months ago. Modified 2 years, 2 months ago. Viewed 968 times ... Bash script throws "assignment to invalid subscript range" when running from zsh. 0. Using a sed command to trim extra spaces,characters, and decimals stuck ...
As most scripts get written for bash and zsh incorporates a lot of such small in-obvious differences which sometimes bastardize the usability or portability to other systems, I tend to declare bash as the interpreter in the shebang of scripts: #!/bin/bash or #!/usr/bin/env bash
13. zsh has different parameter substitution than Bash, which is documented in man zshexpn. It supports a variety of modifiers to expansion behaviour, which are put in parentheses before the variable name: ${(X)name}. The modifier to include array keys (including for associative arrays) is k: ${(k)array} expands to the list of keys in the array ...
4. The problem is the variable name. LINES is one of the variables with a conventional meaning. Its meaning is to convey the number of lines in a terminal. There is a similar variable COLUMNS. One of the jobs of an interactive shell is to update these two variables when the terminal is resized. Both bash and zsh do this.
~ /brackets-highlighter.zsh|32 error| bad substitution. This is the source code of brackets-highlighter.zsh: Define default styles.: ${ZSH_HIGHLIGHT_STYLES[bracket-error]:=fg=red,bold} ... moved the highlight styles assignment to after sourcing zsh-syntax-highlighting.zsh. So yeah. I think I should look into zsh package managers like antigen ...
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.zshrc inconsistent type for assignment? Ask Question Asked 6 years, 8 months ago. ... Zsh: Command Not found : mongo After trying to install mongodb 4.2 using brew. 1. zsh: command not found: mongo. 0. MongoDB , zsh: command not found: mongo. 2. MacOS zshrc Bad Math Expression operator expected. Hot Network Questions Tried to use cig lighter ...
Reading your .zshrc with Bash doesn't work but gets you errors for all the Zsh specific stuff. Your script runs in its own subshell. As settings, environment variables and such are not exported back to the calling shell ascript will not work here.