To set an alias, use the built-in shell alias statement, specifying the required expansion in quotes.

要设置别名，请使用内置的外壳alias语句，并在引号中指定所需的展开形式。

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For example, it's common to set an alias (' ll '), which expands to 'ls -l', for a long listing of a directory or list of files.

例如，设置别名(' ll ')是很普遍的，该别名展开为' ls - l '，用于获得目录或文件列表的长清单。

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The type command reports that the ls command is an alias, but it identifies the set command as a shell builtin.

type 命令报告指出，ls 命令是一个别名，但是它将 set 命令标识为一个 shell 内置命令。

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