如何从 mac 上的 $PATH 删除条目

我试图安装 Sencha Touch SDK 工具2.0.0，但无法正确运行。它在 $PATH 变量中创建了一个条目。 后来我删除了 sencha sdk tools 文件夹，但没有意识到 path 变量仍然存在。

我做 echo $PATH的时候

/Applications/SenchaSDKTools-2.0.0-beta3:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin

我搜索了如何从 $PATH 中删除变量，并遵循以下步骤:

  1. 命令 PATH="/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin"
  2. 做 echo $PATH显示 /usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin
  3. 命令 export PATH
  4. 关闭终端并重新打开它。给命令 echo $PATH。这一次我得到 /Applications/SenchaSDKTools-2.0.0-beta3:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin

有人能告诉我我做错了什么吗？

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最佳答案

What you're doing is valid for the current session (limited to the terminal that you're working in). You need to persist those changes. Consider adding commands in steps 1-3 above to your ${HOME}/.bashrc.

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when you login, or start a bash shell, environment variables are loaded/configured according to .bashrc, or .bash_profile. Whatever export you are doing, it's valid only for current session. so export PATH=/Applications/SenchaSDKTools-2.0.0-beta3:$PATH this command is getting executed each time you are opening a shell, you can override it, but again that's for the current session only. edit the .bashrc file to suite your need. If it's saying permission denied, perhaps the file is write-protected, a link to some other file (many organisations keep a master .bashrc file and gives each user a link of it to their home dir, you can copy the file instead of link and the start adding content to it)

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Check the following files:

/etc/bashrc
/etc/profile
~/.bashrc
~/.bash_profile
~/.profile
~/.MacOSX/environment.plist

Some of these files may not exist, but they're the most likely ones to contain $PATH definitions.

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Use sudo pico /etc/paths inside the terminal window and change the entries to the one you want to remove, then open a new terminal session.

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  1. echo $PATH and copy it's value
  2. export PATH=""
  3. export PATH="/path/you/want/to/keep"
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On MAC OS X Leopard and higher

cd /etc/paths.d

There may be a text file in the above directory that contains the path you are trying to remove.

vim textfile //check and see what is in it when you are done looking type :q
//:q just quits, no saves

If its the one you want to remove do this

rm textfile //remove it, delete it

Here is a link to a site that has more info on it, even though it illustrates 'adding' the path. However, you may gain some insight.

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Close the terminal(End the current session). Open it again.

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If you're removing the path for Python 3 specifically, I found it in ~/.zprofile and ~/.zshrc.

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$PATH contains data that is referenced from actual files. Ergo, you should find the file containing the reference you want to delete, and then delete said reference.

Here is a good list to run through progressively [copied from @Ansgar's answer with minor updates].

/etc/bashrc
/etc/profile
~/.bashrc
~/.bash_profile
~/.profile
~/.MacOSX/environment.plist
/etc/paths
/etc/paths.d/

Note that /etc/paths.d/ is a directory that contains files with path references. For example, inside this directory may be a file called, say, fancy-app, and inside this file you'll see an entry like below:

/path/to/fancy-app

This path will appear in your $PATH and you can delete the entry in the file to remove it, or you can delete the file if it has only the one reference you want to remove.

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If the manual export $PATH method does not seem to be working after you close the terminal and open again, definitely check the shell configuration files.

I found a small script that kept adding some more path in front of the $PATH everytime it was open. For zsh you can check the ~/.zshrc file.


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