When inside vim, I use
to open a file in a new tab.
From the terminal, you can do
vim -p filename1 filename2 to open the two files in tabs.
I have added the following lines to my
.vimrc that allow me to switch between tabs easily.
nnoremap <C-Left> :tabprevious<CR>
nnoremap <C-Right> :tabnext<CR>
nnoremap <C-j> :tabprevious<CR>
nnoremap <C-k> :tabnext<CR>
C stands for the Ctrl key. Thus, I can do
Ctrl-k to switch to the next tab, and likewise for the previous.
This works for me.
For those using tmux - I have mapped
Ctrl-l for switching windows in tmux. Thus, using the Ctrl key, and h,j,k,l, I am able to switch between all of tmux windows and vim tabs.
EDIT : I did not know this when I asked this question, but you really should avoid tabs to simply manage switching between multiple open files. Use buffers instead. Today, I have
nnoremap <C-j> :bprev<CR>
nnoremap <C-k> :bnext<CR>