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Full Discussion: Delete last value from pipe delimited file
Top Forums UNIX for Dummies Questions & Answers Delete last value from pipe delimited file Post 302395548 by relentl3ss on Tuesday 16th of February 2010 11:08:34 AM
Old 02-16-2010
Data Delete last value from pipe delimited file
I have a large(ish) pipe delimited file.

The last line of the file contains a total row count and a checksum:

END|1537451|1328569446

After making other adjustments to the file, I need to strip out the checksum and apply a new value - I have a script to generate the checksum and 'cat' it back to the main file,
However I am failing in removing the original value - I need the data to look like:

END|1537451|

I was thinking of using sed, however I was unsure how to pass a regex arguement to delete everything after the last pipe.

Any assistance will be greatly appreciated.

Sean R
 

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LEARN ABOUT DEBIAN

vconsole.conf

VCONSOLE.CONF(5)						   vconsole.conf						  VCONSOLE.CONF(5)

NAME

       vconsole.conf - configuration file for the virtual console

SYNOPSIS

       /etc/vconsole.conf

DESCRIPTION

       The /etc/vconsole.conf file configures the virtual console, i.e. keyboard mapping and console font.

       The basic file format of the vconsole.conf is a newline-separated list environment-like shell-compatible variable assignments. It is
       possible to source the configuration from shell scripts, however, beyond mere variable assignments no shell features are supported,
       allowing applications to read the file without implementing a shell compatible execution engine.

       Note that the kernel command line options vconsole.keymap=, vconsole.keymap.toggle=, vconsole.font=, vconsole.font.map=,
       vconsole.font.unimap= may be used to override the console settings at boot.

       Depending on the operating system other configuration files might be checked for configuration of the virtual console as well, however only
       as fallback.

OPTIONS

       The following options are understood:

       KEYMAP=, KEYMAP_TOGGLE=
	   Configures the key mapping table of for they keyboard.  KEYMAP= defaults to us if not set. The KEYMAP_TOGGLE= can be used to configured
	   a second toggle keymap and is by default unset.

       FONT=, FONT_MAP=, FONT_UNIMAP=
	   Configures the console font, the console map and the unicode font map.  FONT= defaults to latarcyrheb-sun16.

EXAMPLE

       Example 1. German keyboard and console

       /etc/vconsole.conf:

	   KEYMAP=de-latin1
	   FONT=latarcyrheb-sun16

SEE ALSO

       systemd(1), loadkeys(1), setfont(8), locale.conf(5)

AUTHOR

       Lennart Poettering <lennart@poettering.net>
	   Developer

systemd 							    10/07/2013							  VCONSOLE.CONF(5)
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