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Top Forums UNIX for Beginners Questions & Answers Extract some characters from lines based on pattern Post 302997604 by bakunin on Wednesday 17th of May 2017 08:19:40 AM
Old 05-17-2017
Is the format of the lines fixed? (That is, will "{1:F" and "{2:I" always appear at a certain column?) If so, you won't even need to search for it.

First, you won't need grep because sed can do everything grep can do too:

Code:
sed -n '/{1:F/p' /your/file

If you need "{1:F" to appear on a certain column, modify the line like this:

Code:
sed -n '/^.\{xx\}{1:F/p' /your/file

where the red "xx" is a number representing the number of characters befor the search string.

In the same way you output the characters in question via a so-called "back-reference":

Code:
sed -n '/^.\{xx\}{1:F/ s/^\(.\{yy\}{2:I\)\(...\).*/\2/p;' /your/file

Again, enter sensible integer values for the "xx" and "yy" marked red.

I hope this helps.

bakunin
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COLORS(3)						   libbash colors Library Manual						 COLORS(3)

NAME
colors -- libbash library for setting tty colors. SYNOPSIS
colorSet <color> colorReset colorPrint [<indent>] <color> <text> colorPrintN [<indent>] <color> <text> DESCRIPTION
General colors is a collection of functions that make it very easy to put colored text on tty. The function list: colorSet Sets the color of the prints to the tty to COLOR colorReset Resets current tty color back to normal colorPrint Prints TEXT in the color COLOR indented by INDENT (without adding a newline) colorPrintN The same as colorPrint, but trailing newline is added Detailed interface description follows. Available colors: Green Red Yellow White The color parameter is non-case-sensitive (i.e. RED, red, ReD, and all the other forms are valid and are the same as Red). FUNCTIONS DESCRIPTIONS
colorSet <color> Sets the current printing color to color. colorReset Resets current tty color back to normal. colorPrint [<indent>] <color> Prints text using the color color indented by indent (without adding a newline). Parameters: <indent> The column to move to before start printing. This parameter is optional. If ommitted - start output from current cursor position. <color> The color to use. <color> The text to print. colorPrintN [<indent>] <color> The same as colorPrint, except a trailing newline is added. EXAMPLES
Printing a green 'Hello World' with a newline: Using colorSet: $ colorSet green $ echo 'Hello World' $ colorReset Using colorPrint: $ colorPrint 'Hello World'; echo Using colorPrintN: $ colorPrintN 'Hello World' AUTHORS
Hai Zaar <haizaar@haizaar.com> Gil Ran <gil@ran4.net> SEE ALSO
ldbash(1), libbash(1) Linux Epoch Linux
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