delete lines matching a regular expression Post: 302604831

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Finding lines with a regular expression, replacing them with blank lines

So the tag for this forum says all newbies welcome... All I want to do is go through my file and find lines which contain a given string of characters then replace these with a blank line. I really tried to find a simple command to do this but failed. Here's what I did come up with though: ...

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LEARN ABOUT DEBIAN

qmhandle

Qmhandle(1)						      General Commands Manual						       Qmhandle(1)

NAME

       qmhandle - tool to manage the qmail message queue

SYNOPSIS

       qmhandle [--help] [--version]

DESCRIPTION

       qmHandle is a tool which can be used to manage the qmail message queue.	It's written in Perl (so fully customizable) and has more features
       than qmail-qread and qmail-qstat.

OPTIONS

       -a     try to send queued messages now (qmail must be running)

       -l     list message queues

       -L     list local message queue

       -R     list remote message queue

       -s     show some statistics

       -mN    display message number N

       -dN    delete message number N

       -fsender
	      delete message from sender

       -f're  delete message from senders matching regular expression re

       -Stext delete all messages that have/contain text as Subject

       -h're' delete all messages with headers matching regular expression re (case insensitive)

       -b're' delete all messages with body matching regular expression re (case insensitive)

       -H're' delete all messages with headers matching regular expression re (case sensitive)

       -B're' delete all messages with body matching regular expression re (case sensitive)

       -t're' flag messages with recipients in regular expression 're' for earlier retry (note: this lengthens the time message can stay in queue)

       -D     delete all messages in the queue (local and remote)

       -V     print program version

       -c     display colored output

       -N     list message numbers only

AUTHORS

       Marcela Tiznado <mlt@debian.org>

																       Qmhandle(1)

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