One can change virtual consoles (or virtual terminals, VTs) by pressing Ctrl+Alt+Fn (where Fn represents F1, F2, etc.). In addition, when not running
X, one can press Alt and the arrow keys to cycle through VTs (Alt← to decrement and Alt→ to increment the virtual terminal).
X is running on one of the VTs, the arrow key bindings are not typically set and one must fall back to Ctrl+Alt+Fn to change to another VT.
I generally prefer using the arrow bindings to change VTs. To avoid having to switch between key bindings (Ctrl+Alt+Fn for VTs with
X; arrows for VTs without it), to what command would one bind Alt←/→ for decrementing/incrementing the VT in
In case the answer depends on the system, I am running debian and using dwm and openbox as window managers.