tmux splitw [shell-command]

Splits a pane into two


shell-commandA shell command to run when creating the pane


-bCreate the new pane to the left of or above target-pane
-fCreate a new pane spanning the full window height with -h or width with -v
-hSet the pane take full height
-ICreate an empty pane and forward stdin to it
-vSet the pane take full width
-ZZoom if the window is not zoomed
-c <start-directory>Specify a start directory for the pane
-e <environment>Set environment variables
-l <size>Set the size in columns (horizontal split) or rows (vertical split)
-t <src-pane>The target pane
-F <format>Format output