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lang-bash
if ! [ -f file1 ] || ! [ -f file 2 ] || ! [ -f file3 ] ; thenbut I'd like a more general answer.if [[ ! -f file1 ]] && [[ ! -f file2 ]]; thenif [ ! 1 -eq 2 ] && [ ! 2 -eq 3 ]; then echo yep; fiand it works. I just always write tests with double-braces as a matter of habit. Also, to ensure it's notbash, I further testedif /bin/test ! 1 -eq 2 && /bin/test ! 2 -eq 3 ; then echo yep; fiand it works that way also.[ ! -e file/. ] && [ -r file ]will drop directories. negate it as you like. of course, that's what-ddoes.