Re: chmod + chown

["Casey Boone" <ophidian_snake@hotmail.com>]

i love grep, i use it daily (almost literally)

insanely useful little tool.  so useful i had to find a win32 version for 
when i am in windows (along with a few other *nix command line tools)

i always wondered where its name came from.

Casey


>From: mike808@users.sourceforge.net

> > w00t.  i was thinking find was more like the find.exe from dos/win32.
>
>The linux upgrade for that function is a program called 'grep'.
>
>The funny name comes from the syntax used in the earliest text editor for 
>*nix,
>simply named 'ex' (for 'external editor').
>
>The syntax of the command to search for text in that editor was to specify 
>the
>range of lines in which you were searching (the 'g' is a shorthand for 
>"global",
>meaning from the first to the last line), followed by a "regular 
>expression"
>(where the 're' comes from), which is a pattern for what you're looking 
>for, and
>finished off with an editor command for what you want to do when it finds a 
>line
>that matches the "regular expression", in this case, we just want it to 
>'print'
>the matching line (and hence the trailing 'p').
>
>Put that all together and you get 'g/re/p'. It was so useful, it became a
>standalone command, and the regular expressions are quite, well, 
>expressive.
>
>REs, or RegExes, are a special syntax to describe text that matches a 
>pattern,
>similar to the way certain characters match filenames in the shell. 
>However, the
>shell filename expansion syntax is very different than regular expression 
>syntax.
>
>In the shell, filename that start with 'A', 'B', or 'c', and end with 
>'.txt'
>would be specified as '[ABc]*.txt' on a command line.
>
>In a text editor, or for the 'grep' command, the same match would be 
>expressed
>as '^[ABc].*\.txt$' where we are indicating the line must consist only of 
>such
>'words'. The '^' matches the "beginning" of the line, the '$' matches the 
>"end"
>of the line, and the '.' matches "any" character. The '*' matches 0 or more 
>of
>whatever the previous character was, in this case "any" character. Finally,
>because we want to actually match the '.' character, we have to mark it so 
>that
>it no longer has its special meaning of the "any" character. To do that you 
>put
>a '\' (backslash) in front of any character that would normally be special 
>to
>make it no longer have its special, magical properties.
>
>And that, in a nutshell, is 'grep'.
>
>I don't know if there's anything there, but there's a Kwiki with all sorts 
>of
>'Linux-By-Example' commands at http://www.archlug.org/lbe
>
>See http://www.archlug.org/linux-by-example/LBE-grep
>and http://www.archlug.org/linux-by-example/LBE-find
>
>Mike/
>
>---------------------------------------------
>http://www.valuenet.net
>
>
>
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