Comments on: Not grep! http://prefetch.net/blog/index.php/2007/02/09/not-grep/ Blog O' Matty Tue, 07 Feb 2012 02:31:44 +0000 hourly 1 By: matty http://prefetch.net/blog/index.php/2007/02/09/not-grep/comment-page-1/#comment-50608 matty Sat, 14 Apr 2007 19:14:06 +0000 http://prefetch.net/blog/index.php/2007/02/09/not-grep/#comment-50608 Hi Ceri, Your right! I forgot to type in the egrep "-v" option. Oops #2! - Ryan Hi Ceri,

Your right! I forgot to type in the egrep “-v” option. Oops #2!

- Ryan

]]> By: Ceri Davies http://prefetch.net/blog/index.php/2007/02/09/not-grep/comment-page-1/#comment-50455 Ceri Davies Fri, 13 Apr 2007 09:48:13 +0000 http://prefetch.net/blog/index.php/2007/02/09/not-grep/#comment-50455 Perhaps it's because the commands that you quoted do completely opposite things ;-) Perhaps it’s because the commands that you quoted do completely opposite things ;-)

]]> By: Thomas http://prefetch.net/blog/index.php/2007/02/09/not-grep/comment-page-1/#comment-39322 Thomas Mon, 12 Feb 2007 07:58:20 +0000 http://prefetch.net/blog/index.php/2007/02/09/not-grep/#comment-39322 I have just begin digging through the scripts that HP OVO uses for monitoring, this is how they try to determine if knfsd is installed or not: rpm -qa | grep knfsd | wc -l` -eq 1 && ${USE_KERNEL_NFSD} != "no". There is plenty more terrible 'newbe' stuff in their scritps... I have just begin digging through the scripts that HP OVO uses for monitoring, this is how they try to determine if knfsd is installed or not: rpm -qa | grep knfsd | wc -l` -eq 1 && ${USE_KERNEL_NFSD} != “no”. There is plenty more terrible ‘newbe’ stuff in their scritps…

]]> By: matty http://prefetch.net/blog/index.php/2007/02/09/not-grep/comment-page-1/#comment-39044 matty Sat, 10 Feb 2007 14:38:53 +0000 http://prefetch.net/blog/index.php/2007/02/09/not-grep/#comment-39044 Ooops -- thanks for the correction Andy! Ooops — thanks for the correction Andy!

]]> By: Andy Miller http://prefetch.net/blog/index.php/2007/02/09/not-grep/comment-page-1/#comment-38936 Andy Miller Sat, 10 Feb 2007 05:59:35 +0000 http://prefetch.net/blog/index.php/2007/02/09/not-grep/#comment-38936 You mean the logic operations built into find? :-) (Since the object is to bypass the fork to grep) I think one of the reasons is that the find syntax can be somewhat arcane, and even the newest sysadmins know what grep does. By the the time you realize find can do so much more, find | grep is eternally committed to muscle memory. More seasoned sysadmins might realize (after maintaining one too many 'what the hell was he thinking when he wrote this?', or perhaps even more commonly, 'what the hell was I thinking when I wrote this?' type scripts) that often clarity wins over efficiency, especially in non-time critical applications. (So I guess I'm chiming on your poll for a data point of "both :-) ) -Andy You mean the logic operations built into find? :-) (Since the object is to bypass the fork to grep)

I think one of the reasons is that the find syntax can be somewhat arcane, and even the newest sysadmins know what grep does. By the the time you realize find can do so much more, find | grep is eternally committed to muscle memory.

More seasoned sysadmins might realize (after maintaining one too many ‘what the hell was he thinking when he wrote this?’, or perhaps even more commonly, ‘what the hell was I thinking when I wrote this?’ type scripts) that often clarity wins over efficiency, especially in non-time critical applications.

(So I guess I’m chiming on your poll for a data point of “both :-) )

-Andy

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