:@:

repeat the last Ex command.

:@@

after running :@: first time, we can repeat it with :@@ command.

:bn[ext]

step forward through the buffer list.

:bp[revious]

go backward command.

<C-o>

each time :bnext will adds a record to the jump list. <C-o> goes back to the previous record in the jump list.

Tip30 Tip32