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8. Streams and sed -- The Stream Editor x stderr and stdout because the redirection to A came first. 8.6 Using sed to Edit Streams ed used to be the standard text editor for UNIX. It is cryptic to use but is compact and programmable. <span>sed stands for stream editor and is the only incarnation of ed that is commonly used today. sed allows editing of files non-interactively. In the way that grep can search for words and filter lines of text, sed can
last interval [days]
repetition number in this series
scheduled repetition interval
last repetition or drill
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