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Full Discussion: Help regarding files
Top Forums Shell Programming and Scripting Help regarding files Post 302350609 by clx on Friday 4th of September 2009 10:36:57 AM
Old 09-04-2009
one idea: ( not tested)

Code:
tmpfile=file.tmp
sourcefile=file.main
 
lc_main=$(wc -l file.main | awk '{print $1}')
lc_tmp=$(wc -l file.tmp | awk '{print $1}')
 
 
lc_diff=$(echo "$lc_main-$lc_tmp" | bc)
 
tail +${lc_diff} $sourcefile >> $tmpfile

 

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DAILYSTRIPS-UPDATE(1)					      General Commands Manual					     DAILYSTRIPS-UPDATE(1)

NAME
dailystrips-update - download updated dailystrips definitions SYNOPSIS
dailystrips-update [OPTIONS] DAYS WARNING
This script is intended to use under the assumption that the development version of strips.def is the latest and best. Unfortunately, at the time of this writing (August, 2007) upstream development seems to have ceased, so using this script will likely result in a more out- of-date strips definiton than is included in the distribution. WARNING
Due to the above, as of November 2009, dailystrips-update has been neutered to exit immediately on execution, and it is expected that it will be removed in a future version of this package. DESCRIPTION
The dailystrips-update script is provided to automatically retrieve updated strip definitions from a central server, eliminating the need to manually download and install new versions of the entire program. It is recommened that the dailystrips-update script be run before each execution of the main dailystrips program. The dailystrips-update script has provisions to only check for updates if the current file has reached a certain age, which maximizes efficiency and should allow users to run the update script before each execution of dailystrips without overtaxing the update server. USAGE
Operation is straightforward. Simply execute dailystrips-update and the updated definitions will be saved to ~/.dailystrips-updates.def, which will automatically be loaded by the main dailystrips program. OPTIONS
-q, --quiet Turn off progress messages -v, --verbose Turn on extra progress information, overrides -q --proxy host:port Use specified HTTP proxy server (overrides environment proxy, if set) --proxyauth user:pass Set username and password for proxy server --noenvproxy Ignore the http_proxy environment variable, if set --retries NUM When downloading items, make NUM attempts instead of only once --updates FILE Save updates to FILE instead of ~/.dailystrips-updates.def --minage NUM Skip downloading updates if local file is less than NUM seconds old -V, --version Print version number -h, --help Show summary of options SEE ALSO
dailystrips(1) AUTHOR
This manual page was written by Rene Weber <rene_debmaint@public.e-mail.elvenlord.com>, for the Debian GNU/Linux system (but may be used by others). June 25, 2004 DAILYSTRIPS-UPDATE(1)
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