В принципе моя локальная машина на Ubuntu , можно напрямую поставить разово качнуть rsync а потом в определенное время докачивать по mtime?
Общий делитель тут 2. Ибо 2 на 4 не делится.
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One correspondent claimed that 27^4+162^3=9^7 was a solution, because the first three conditions hold, and the common factor is 9, which isn't a prime. But of course, if A,B,C have 9 as a common factor, then they also have 3, and 3 is prime. The phrase "no common prime factor" means the same thing as "no common factor greater than 1."
GREP(1) User Commands GREP(1)
NAME
grep, egrep, fgrep, rgrep - print lines that match patterns
SYNOPSIS
grep [OPTION...] PATTERNS [FILE...]
grep [OPTION...] -e PATTERNS ... [FILE...]
grep [OPTION...] -f PATTERN_FILE ... [FILE...]если не знать
man grep