cmd /c ipconfig /all & Output.txt

该命令执行命令并在一个命令中打开Output.txt文件

&是Bash中等价的;&&是Bash中的&&(只在前一个没有导致错误时才运行命令)。

cmd /c ipconfig /all & Output.txt

该命令执行命令并在一个命令中打开Output.txt文件

文档中的一段话:

来源:微软，Windows XP专业产品文档，命令shell概述 另外:Windows CMD命令的A-Z索引

Using multiple commands and conditional processing symbols You can run multiple commands from a single command line or script using conditional processing symbols. When you run multiple commands with conditional processing symbols, the commands to the right of the conditional processing symbol act based upon the results of the command to the left of the conditional processing symbol. For example, you might want to run a command only if the previous command fails. Or, you might want to run a command only if the previous command is successful. You can use the special characters listed in the following table to pass multiple commands. & [...] command1 & command2 Use to separate multiple commands on one command line. Cmd.exe runs the first command, and then the second command. && [...] command1 && command2 Use to run the command following && only if the command preceding the symbol is successful. Cmd.exe runs the first command, and then runs the second command only if the first command completed successfully. || [...] command1 || command2 Use to run the command following || only if the command preceding || fails. Cmd.exe runs the first command, and then runs the second command only if the first command did not complete successfully (receives an error code greater than zero). ( ) [...] (command1 & command2) Use to group or nest multiple commands. ; or , command1 parameter1;parameter2 Use to separate command parameters.

是的，有。&。

如果命令1没有失败，&&将在命令1完成时执行命令2。

无论如何都会执行。

你可以使用call来克服环境变量被太快求值的问题。

set A=Hello & call echo %A%