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Full Discussion: awk search and replace and overwrite file
Top Forums Shell Programming and Scripting awk search and replace and overwrite file Post 302384479 by radoulov on Tuesday 5th of January 2010 12:37:03 PM
Old 01-05-2010
With AWK you'll need something like this:

Code:
awk '{gsub("hello", "bye")}1' test.dat > test.dat_tmp && 
  mv test.dat_tmp test.dat

or this (not recommended):

Code:
{ rm test.dat && 
    awk '{gsub("hello", "bye")}1' > test.dat
  } < test.dat

I would use Perl:

Code:
perl -i -pe's/hello/bye/g' test.dat

This User Gave Thanks to radoulov For This Post:
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LEARN ABOUT DEBIAN

arp2ethers

ARP2ETHERS(8)						      System Manager's Manual						     ARP2ETHERS(8)

NAME

       arp2ethers - convert arpwatch address database to ethers file format

SYNOPSIS

       arp2ethers [ arp.dat file ]

DESCRIPTION

       arp2ethers  converts  the file /var/lib/arpwatch/arp.dat (or the file specified on the command line) into ethers(5) format on stdout.  Usu-
       ally arp.dat is an ethernet/ip database file generated by arpwatch(8).  The arpwatch daemon in Debian will create different arp.dat depend-
       ing on its configuration. All of them will be available at /var/lib/arpwatch/.

FILES

       /var/lib/arpwatch - default directory for arp.dat
       arp.dat - ethernet/ip address database

SEE ALSO

       arpwatch(8), ethers(5), rarp(8), arp(8),

BUGS

       Please send bug reports to arpwatch@ee.lbl.gov.

AUTHORS

       Original  version  by  Craig Leres of the Lawrence Berkeley National Laboratory Network Research Group, University of California, Berkeley,
       CA.

       Modified for the Debian Project by Peter Kelemen, with additions from Erik Warmelink.

       The current version is available via anonymous ftp:

	      ftp://ftp.ee.lbl.gov/arpwatch.tar.gz

       This manual page was contributed by Hugo Graumann.

																     ARP2ETHERS(8)
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