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# Configuration Files
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Zsh has several system-wide and user-local configuration files.
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Prezto has one user-local configuration file.
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System-wide configuration files are installation-dependent but are installed
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in *`/etc`* by default.
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User-local configuration files have the same name as their global counterparts
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but are prefixed with a dot (hidden). Zsh looks for these files in the path
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stored in the `$ZDOTDIR` environment variable. However, if said variable is
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not defined, Zsh will use the user's home directory.
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## File Descriptions
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The configuration files are read in the following order:
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01. */etc/zshenv*
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02. *~/.zshenv*
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03. */etc/zprofile*
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04. *~/.zprofile*
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05. */etc/zshrc*
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06. *~/.zshrc*
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07. *~/.zpreztorc*
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08. */etc/zlogin*
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09. *~/.zlogin*
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10. *~/.zlogout*
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11. */etc/zlogout*
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### zshenv
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This file is sourced by all instances of Zsh, and thus, it should be kept as
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small as possible and should only define environment variables.
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### zprofile
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This file is similar to *zlogin*, but it is sourced before *zshrc*. It was added
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for [KornShell][1] fans. See the description of *zlogin* below for what it may
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contain.
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*zprofile* and *zlogin* are not meant to be used together but can be done so.
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### zshrc
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This file is sourced by interactive shells. It should define aliases, functions,
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shell options, and key bindings.
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### zpreztorc
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This file configures Prezto.
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### zlogin
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This file is sourced by login shells after *zshrc*. Thus, it should contain
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commands that need to execute at login. It is usually used for messages such as
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[*fortune*][2], [*msgs*][3], or for the creation of files.
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This is not the file to define aliases, functions, shell options, and key
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bindings. It should not change the shell environment.
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### zlogout
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This file is sourced by login shells during logout. It should be used for
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displaying messages and for deletion of files.
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## Authors
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*The authors of these files should be contacted via the [issue tracker][4].*
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- [Sorin Ionescu](https://github.com/sorin-ionescu)
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[1]: https://www.kornshell.com
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[2]: https://en.wikipedia.org/wiki/Fortune_(Unix)
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[3]: https://www.manpagez.com/man/1/msgs
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[4]: https://github.com/sorin-ionescu/prezto/issues
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