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Also known as a concordance. And they are still relevant and quite useful. A good example is quickly identifying bible verses when you only know a few words. Another example would be indexing all of Shakespeare's sonnets to enable similar quick lookup by keyword.


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Unless you took steps to log the output somewhere beforehand (e.g. by logging the whole session with [script](https://en.wikipedia.org/wiki/Script_(Unix)), or by redirecting the output to a file), the output of the command that's scrolled off the screen is goneĀ¹. In the case of rsync, this isn't a problem. Rsync is usually idempotent (this is not always ...


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Given that the term dates from the early 1970s, that's where you should look for a "contemporary" meaning of the term. Likewise, being jargon, you should look at the popular languages of the day, in terms of the developer's experience. For instance, you can find the term descriptor applied in Algol and in uses of Algol (Burroughs machines, quoting from The ...


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Indeed in this context "online" means "on a computer" as opposed to printed on paper. Source: I was responsible for getting new versions of those manuals printed and reproduced at the MIT Lab for Computer Science back in the 70s.


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The word "on-line" is used in the sense "operating under the direct control of, or connected to, a main computer." Reading a manual "on-line" is therefore the same as reading it "on the computer". This is in contrast to "off-line" in the sense "operating independently of, or disconnected from, an associated computer." Reading a manual "off-line" is ...


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In contrast to a printed (hard-copy) manual, which you could read off-line (while not using a computer). The term dates back (at least) to time-sharing systems. Users may have had a terminal which could be used for typing text, punching paper tapes. But they were only able to use the computer when they were on-line (the "line" referring to the ...


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(As this does not answer the question, this is should have been a comment, but is too long - so treat it as a comment). As an alternative to FreeBSD's xargs you can use GNU Parallel which does not have this limitation. It even supports repeating the context: seq 10 | parallel -Xj1 echo con{}text seq 10 | parallel -mj1 echo con{}text GNU Parallel is a ...


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"device files" are a special type of file (in much the same way directories, symlinks, named pipes and unix domain sockets are special types of file). They do not store user data directly, instead they store a major and minor device number and a device type (char or block). Filesystems designed for unix-like systems will have support for storing device files....


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No, the sticky bit was not like the set-UID or set-GID flags. It didn't effect any changes to process credentials. What the sticky bit did was make the program text "sticky". It wasn't a misnomer, originally. background: program image sections and shared text In essence, without getting too deep into the details of executable file formats (which can, ...



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