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Top Forums Shell Programming and Scripting how can I delete lines without actually going into the file Post 17041 by TRUEST on Sunday 10th of March 2002 04:50:21 PM
Old 03-10-2002
how can I delete lines without actually going into the file

what am trying to do is delete a line in a specific file but I dont know what to do. I cant use the sed or awk commands because these commands dont really alter the original file. they only alter what they display on the screen

by the way, am trying to do this from a script so if anybody can help me, I'd really appreciate it.

thanks
 

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PTREPACK(1)						      General Commands Manual						       PTREPACK(1)

NAME
ptrepack - Copy any PyTables Leaf, Group or complete subtree into another file. SYNOPSIS
ptrepack -h -v -o -R start,stop,step --non-recursive --dest-title=title --dont-copyuser-attrs --overwrite-nodes --complevel=(0-9) --com- plib=lib --shuffle=(0|1) --fletcher32=(0|1) --keep-source-filters --upgrade-flavors --dont-regenerate-old-indexes sourcefile:sourcegroup destfile:destgroup DESCRIPTION
Copy any Leaf, Group or complete subtree from a PyTables file into another file. OPTIONS
A summary of options is included below. -h Prints a help text. -v Show more information. -o Overwite destination file. -R RANGE Select a RANGE of rows in the form start,stop,step during the copy of all the leaves. --non-recursive Do not do a recursive copy. Default is to do it. --dest-title=title Title for the new file (if not specified, the source is copied). --dont-copy-userattrs Do not copy the user attrs (default is to do it). --overwrite-nodes Overwrite destination nodes if they exist. Default is not to overwrite them. --complevel=(0-9) Set a compression level (0 for no compression, which is the default). --complib=lib Set the compression library to be used during the copy. lib can be set to "zlib", "lzo", "ucl" or "bzip2". Defaults to "zlib". --shuffle=(0|1) Activate or not the shuffling filter (default is active if complevel>0). --fletcher32=(0|1) Whether to activate or not the fletcher32 filter (not active by default). --keep-source-filters Use the original filters in source files. The default is not doing that if any of --complevel, --complib, --shuffle or --fletcher32 option is specified. --upgrade-flavors When repacking PyTables 1.x files, the flavor of leaves will be unset. With this, such a leaves will be serialized as objects with the internal flavor ("numpy" for 2.x series). --dont-regenerate-old-indexes Disable regenerating old indexes. The default is to regenerate old indexes as they are found. SEE ALSO
ptdump(1). These utilities are documented fully by PyTables user's manual. AUTHOR
This manual page was written by Francesc Altet <faltet@carabos.com>. July 7, 2007 PTREPACK(1)
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