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IT/Scripting.md
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@ -22,9 +22,11 @@ echo $MY_VARIABLE
## Quotes ## Quotes
In Bash, different styles of quotes mean different things: In Bash, different styles of quotes mean different things:
| Quote | Description | | Quote | Description |
| ----- | ----------- | | ----------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| | | | Single Quotes (') | Enclosing characters in single quotes (‘'’) preserves the literal value of each character within the quotes. A single quote may not occur between single quotes, even when preceded by a backslash. Commands in single quotes will not be evaluated. |
| Double Quotes (") | Enclosing characters in double quotes (‘"’) preserves the literal value of all characters within the quotes, with the exception of ‘$’, ‘`’, ‘\’, and, when history expansion is enabled, ‘!’. When the shell is in POSIX mode (see [Bash POSIX Mode](https://www.gnu.org/software/bash/manual/html_node/Bash-POSIX-Mode.html)), the ‘!’ has no special meaning within double quotes, even when history expansion is enabled. The characters ‘$’ and ‘`’ retain their special meaning within double quotes (see [Shell Expansions](https://www.gnu.org/software/bash/manual/html_node/Shell-Expansions.html)). The backslash retains its special meaning only when followed by one of the following characters: ‘$’, ‘`’, ‘"’, ‘\’, or `newline`. Within double quotes, backslashes that are followed by one of these characters are removed. Backslashes preceding characters without a special meaning are left unmodified. A double quote may be quoted within double quotes by preceding it with a backslash. If enabled, history expansion will be performed unless an ‘!’ appearing in double quotes is escaped using a backslash. The backslash preceding the ‘!’ is not removed. |
| | |
## Commands ## Commands
| Command | Description | | Command | Description |
| ------------- | ---------------------------------------------------------------------------------------------- | | ------------- | ---------------------------------------------------------------------------------------------- |