How do I run two commands in one line in Windows CMD?

Like this on all Microsoft OSes since 2000, and still good today:

dir & echo foo

If you want the second command to execute only if the first exited successfully:

dir && echo foo

The single ampersand (&) syntax to execute multiple commands on one line goes back to Windows XP, Windows 2000, and some earlier NT versions. (4.0 at least, according to one commenter here.)

There are quite a few other points about this that you'll find scrolling down this page.

Historical data follows, for those who may find it educational.

Prior to that, the && syntax was only a feature of the shell replacement 4DOS before that feature was added to the Microsoft command interpreter.

In Windows 95, 98 and ME, you'd use the pipe character instead:

dir | echo foo

In MS-DOS 5.0 and later, through some earlier Windows and NT versions of the command interpreter, the (undocumented) command separator was character 20 (Ctrl+T) which I'll represent with ^T here.

dir ^T echo foo

A quote from the documentation:

• Source: Microsoft, Windows XP Professional Product Documentation, Command shell overview
• Also: An A-Z Index of Windows CMD commands

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.

& is the Bash equivalent for ; ( run commands) and && is the Bash equivalent of && (run commands only when the previous has not caused an error).