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Full Discussion: How can i grep for an hour before data
Top Forums Shell Programming and Scripting How can i grep for an hour before data Post 302340602 by ilikecows on Tuesday 4th of August 2009 04:15:04 AM
Old 08-04-2009
Id recommend using this as a script:

The only catch is if it happens to be between midnight and 01:00 this won't work. If you need this functionality let me know and I'll see if I can figure something out.

bash code:
Code:
bash-3.00$ genexpression()
> {
> stime=`date '+ %H'`
> stime=`expr $stime \- 1`
> if (( $stime < 10 ))
> then
> stime=0${stime}
> fi
> express=\$\\\(`date '+%m/%d/%Y'`\ $stime
> }
bash-3.00$ genexpression
bash-3.00$ egrep "$express" testfile



---------- Post updated at 04:15 AM ---------- Previous update was at 04:08 AM ----------

Now that I think about it you can probably replace the while thing with this if you manually typing in the time is ok:

Code:
> express=\$\\\(`date '+%m/%d/%Y'`\ "hour you want to filter"

Last edited by ilikecows; 08-04-2009 at 05:11 AM.. Reason: added comment
 

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LEARN ABOUT CENTOS

paps

PAPS(1) 						      General Commands Manual							   PAPS(1)

NAME

       paps - UTF-8 to PostScript converter using Pango

SYNOPSIS

       paps [options] files...

DESCRIPTION

       paps reads a UTF-8 encoded file and generates a PostScript language rendering of the file. The rendering is done by creating outline curves
       through the pango ft2 backend.

OPTIONS

       These programs follow the usual GNU command line syntax, with long options starting with  two  dashes  (`-').   A  summary  of  options	is
       included below.

       --landscape
	      Landscape output. Default is portrait.

       --columns=cl
	      Number of columns output. Default is 1.

       --font=desc
	      Set the font description. Default is Monospace 12.

       --rtl  Do rtl layout.

       --paper ps
	      Choose paper size. Known paper sizes are legal, letter, a4. Default is A4.

       --bottom-margin=bm
	      Set bottom margin in postscript points (1/72 inch). Default is 36.

       --top-margin=tm
	      Set top margin. Default is 36.

       --left-margin=lm
	      Set left margin. Default is 36.

       --right-margin=rm
	      Set right margin. Default is 36.

       --help Show summary of options.

       --header
	      Draw page header for each page.

       --markup
	      Interpret the text as pango markup.

       --encoding=ENCODING
	      Assume the documentation encoding is ENCODING.

       --lpi  Set the lines per inch. This determines the line spacing.

       --cpi  Set the characters per inch. This is an alternative method of specifying the font size.

       --stretch-chars
	      Indicates  that  characters  should be stretched in the y-direction to fill up their vertical space. This is similar to the texttops
	      behaviour.

AUTHOR

       paps was written by Dov Grobgeld <dov.grobgeld@gmail.com>.

       This manual page was written by Lior Kaplan <kaplan@debian.org>, for the Debian project (but may be used by others).

								  April  17, 2006							   PAPS(1)
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