Перенаправления потоков

Redirection

** 1 = STDOUT 2 = STDERR **
command 2>filename	redirects STDERROR
command >&2	redirect *to* STDERROR. ie echo hello >&2 sends hello to stderror
command >foo 2>&1	redirects STDOUT to foo and STDERROR to STDOUT (which in this case is foo)
>&-	causes STDOUT to go nowhere (cyberspace)
<&-	causes input to come from nowhere. ie there is no input

Всё время забываю что и куда писать

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