Emacs: Run Shell in Emacs

Start Shell in Emacs

Alt+x shell.

When in shell, to run the previous shell command, press Ctrl+↑.

[see also Emacs Init: Change Default Shell (PowerShell)]

Start a Second Shell in Emacs

Ctrl+u Alt+x shell

Call a shell command once

Alt+x shell-command 【Alt+!】 to run a single shell command.

Send text selection to a shell command

Select a region, then Alt+x shell-command-on-region 【Alt+|】.

For example, select a region, then type Alt+| wc -l Enter. This will print line count of region.

You can have the result replace the selected region. To do that, do universal-argument 【Ctrl+u】 before calling the shell on region command.

My shell doesn't work in Windows?

Most problems are probably caused by incorrect environment variable setup. See: Emacs in Microsoft Windows FAQ.