augroup filetypedetect
    au BufRead,BufNewFile *.tmux set filetype=tmux
    au BufRead,BufNewFile *.ssh set filetype=sshconfig
    au BufRead,BufNewFile *.git set filetype=gitconfig
augroup END

augroup filetypedetect
    au BufRead,BufNewFile *.tmux set filetype=tmux
    au BufRead,BufNewFile *.ssh set filetype=sshconfig
    au BufRead,BufNewFile *.git set filetype=gitconfig
    au BufRead,BufNewFile *.cron set filetype=crontab
augroup END

Mark .cron as crontab files
Mark .cron as crontab files

spapanik/configuration,spapanik/configuration