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37 lines
1.1 KiB
Markdown
37 lines
1.1 KiB
Markdown
## Name
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Shell Variables - Special local and environment variables used by the Shell
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## Description
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The Shell uses various variables to allow for customisations of certain behavioural or visual things.
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Such variables can be changed or set by the user to tweak how the shell presents things.
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## Behavioural
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1. Output interpretations
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`IFS` (local)
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The value of this variable is used to join lists or split strings into lists, its default value is a newline (`\\n`).
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## Visual
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2. Prompting
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`PROMPT` (environment)
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The value of this variable is used to generate a prompt, the following escape sequences can be used literally inside the value, and they would expand to their respective values:
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- `\\u` : the current username
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- `\\h` : the current hostname
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- `\\w` : a collapsed path (relative to home) to the current directory
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- `\\p` : the string '$' (or '#' if the user is 'root')
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Any other escaped character shall be ignored.
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`PROMPT_EOL_MARK` (environment)
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The value of this variable is used to denote the ends of partial lines (lines with no newline), its default value is '%'.
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