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Top Forums UNIX for Dummies Questions & Answers question Post 51004 by wannabe_guru on Friday 7th of May 2004 07:43:16 PM
Old 05-07-2004
more help,

HI guys, im revising for an exam if anyone is wondering, I typed the following

grep King MagnaCarta.txt
echo grep King MagnaCarta.txt
`echo grep King MagnaCarta.txt`

the first one gets me the sentence in which King is mentioned
second one just prints out grep King MagnaCarta.txt

the third one displays a msg saying
echo grep King MagnaCarta.txt: Command not found

Why does it do that? What do the single quotes change in the code??
 

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PARTY(1)						      General Commands Manual							  PARTY(1)

NAME
party - set OS responses mode SYNOPSIS
party ON|OFF|WHEREIS [ - ] dnv DESCRIPTION
Operating systems being what they are, the admin people can easily grow tired of command responses that resemble dyslexic eugene- speak filtered through Kernighan and Ritchie's collective back-brains. To alleviate this, we have included a slightly more `casual' mode, in which the responses to all commands are first filtered through a customising routine (DUDE) , which makes them sound a little more friendly while retaining their full information content (usually). The rooted(c) system prompt is changed to `What now, dude?' and output from each command is terminated by `No problem, dude.' OPTIONS
-v Verbose mode (ALL commands have a `verbose' mode). When this option is present, all filtered responses are preceeded by a message: `This response has been parsed by the DUDE filter and is not intended to be some sort of sleazy come-on.' -d Don't restart all processes after recompiling the /uselss/libs/eugene file (see below). This alows any important tasks to complete beforehand. -n Notify all users that they are about to be force-logged out and force-logged in again. ON Activates the DUDE filter. OFF De-activates the DUDE filter. WHEREIS Doesn't do anything, but we couldn't resist it. EXAMPLES
%-) party on What now, dude? To compare the differing responses, here is output provided by the ispi -s command, with party OFF and party ON: party OFF line who why how long ========================================================== 000 rooted that's you, dweeb! epoch ---------------------------------------------------------- 00F wp she's supposed to be 0:44:12 typing up the end of financial year report, but she's been doing her resume when she thinks no-one is watching ---------------------------------------------------------- 014 maint playing games, as usual 0:51:16 party ON Well, let's see who's on, eh? There's you, of course, on line 000 (Imagine that! Hahaha!) Oh look, on serIOus line 00F, it's that cute little secretary - looks like she's lost her keyboard template again, she's been hitting the escape key for the past five minutes! AND OF COURSE, the guys down in maintenance are playing `cosmic ballcrushers'. As usual. Well, who else, um, no-one really interesting like, ya know, oh hang on, DTR is toggling on serIOus line 03D.. oh, no problem, it's that stuffed modem again. You want maybe I should send some AMail to maintenance and get 'em to look at it? No problem, dude. What now, dude? FILES
/uselss/libs/bill&ted/DUDE This is the pipe process, usually started at system shoe, which lies idle until party ON is issued. /uselss/libs/eugene Contains all of the ordinary, ho-hum confusing computer - jargonese responses which commands ordinarily issue. Text file. /uselss/libs/eugene.spoo compiled version of the eugene file. /ephemeral/eugene.chex Checksum for the compiled eugene file. SEE ALSO
crp(1), stuffio(2), doobrie(9), gouge(3), ftang(65534), wi(-1), edmond(29), jumpstart(2), vo_mit(992) BUGS
The -n option can be slow. If the n option is issued, some users in a wi editing session may not receive the `warning, restart imminent' message until after the restart. There is no way selectively to follow symbolic links. Sunburne Computer, Inc. 9 October 1991 Aug 18, 1997 PARTY(1)
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