Open multiple files at once in a tab and split in Vim

It's possible using -p to make the tabs and then -c vs to make the vertical split.

$vim -p file2 file4 -c 'vs file1' -c 'tabn' -c 'vs file3'

does what you wanted in your example, but it's a mess of a command to type and you have to list the file you want to end up on the right of the split first which seems backwards to me.

You probably want to look into :help mksession to save the current session to a file and then load it with :source [file] to reload it. It's easier then that monster of a command line and you could even do it from the command line. $vim -c 'source session.vim

I got the idea for the solution from vim_use and the specifics from

:help tabpage
:help windows
:help starting

As a side note, I love using full tab help pages in vim like this tab help windows

Though you cannot use -o, you can execute any commands passed with -c:

$ vim - -c 'split file1'