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Full Discussion: compare three files and insert a blank line at each mismatch
Top Forums Shell Programming and Scripting compare three files and insert a blank line at each mismatch Post 302326556 by rakeshawasthi on Friday 19th of June 2009 02:12:20 AM
Old 06-19-2009
I understood your requirement already.
Have you tried some code yourself? If yes, please share.

---------- Post updated 06-19-09 at 11:42 AM ---------- Previous update was 06-18-09 at 05:17 PM ----------

To start with, you can use the below code for comparing two files and inserting blanks.
Code:
sdiff file1 file2 | awk '{
if ($1==">")
   $1="                                                                  "
if ($2=="<")
   $2=" "
print
}'

 

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LEARN ABOUT DEBIAN

mac-vendor

MAC-VENDOR(5)							File Formats Manual						     MAC-VENDOR(5)

NAME

       mac-vendor - Ethernet vendor file for arp-scan

SYNOPSIS

       mac-vendor.txt

DESCRIPTION

       The  mac-vendor.txt  contains Ethernet MAC to vendor string mappings for arp-scan.  It is used in addition to the IEEE OUI and IAB listings
       in ieee-oui.txt and ieee-iab.txt.  It is for MAC-vendor mappings that are not covered by the IEEE manufacturer listings.

       Each line in the mac-vendor.txt file contains a MAC-vendor mapping in the form:

       <MAC-Prefix><TAB><Vendor>

       Where <MAC-Prefix> is the prefix of the MAC address in hex, and <Vendor> is the name of the vendor.  The prefix can be of any  length  from
       two  hex  digits  (one octet) to twelve hex digits (six octets, the entire Ethernet hardware address).  The alphabetic hex characters [A-F]
       must be entered in upper case.

       For example:
       012345	 would match 01:23:45:xx:xx:xx, where xx represents any value;
       0123456	 would match 01:23:45:6x:xx:xx; and
       01234567  would match 01:23:45:67:xx:xx.

       Blank lines and lines beginning with "#" are ignored.

       The order of entries in the file is not important.  arp-scan will attempt to match larger prefixes before trying to match smaller ones, and
       will stop at the first match.

FILES

       /usr/local/share/arp-scan/mac-vendor.txt

EXAMPLE

       # From nmap Debian bug report #369681 dated 31 May 2006
       525400  QEMU
       B0C420  Bochs

       # From RFC 2338: 00-00-5E-00-01-{VRID}
       00005E0001      VRRP (last octet is VRID)

       # Microsoft WLBS (Windows NT Load Balancing Service)
       # http://www.microsoft.com/technet/prodtechnol/acs/reskit/acrkappb.mspx
       02BF    Microsoft WLBS (last four octets are IP address)

AUTHOR

       Roy Hills <Roy.Hills@nta-monitor.com>

SEE ALSO

       arp-scan(1)

       get-oui(1)

       get-iab(1)

       arp-fingerprint(1)

       http://www.nta-monitor.com/wiki/ The arp-scan wiki page.

								  March 30, 2007						     MAC-VENDOR(5)
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