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Top Forums Shell Programming and Scripting Delete records in reverse order Post 302834155 by Scrutinizer on Thursday 18th of July 2013 11:57:32 AM
Old 07-18-2013
Try:
Code:
awk 'c==n-1; /^##/{c++}' n=2 file

Code:
0000021 DTA     14-JAN-2003     CNV
0000021 DTA     25-MAR-2012     DTA
0000021 DTA     26-MAR-2012     DTA
################################################

This User Gave Thanks to Scrutinizer For This Post:
 

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DUMP-ACCT(8)						     GNU Accounting Utilities						      DUMP-ACCT(8)

NAME
dump-acct - print an acct file in human-readable format. SYNOPSIS
dump-acct [-r|--reverse] [-R|--raw] [--format] version] [--byteswap] [--ahz] hertz] [-n|--num recs] [-h|--help] [ files] DESCRIPTION
dump-acct filename prints a list of all executed processes. This list is written by the kernel which must be compiled with BSD process accounting enabled (Debian kernel image have it already enabled). It must be started with accton(5). Note that on Debian systems, this is ensured via the init script /etc/init.d/acct. All fields are separated by vertical line. Fields are: command, version, user time, system time, effective time, uid, gid, memory, io, pid, ppid, time. User, system and effective times are ticks per second. One tick is usually 1/50 of a second. The time field shows the start time of the process. The --raw switch, as well as the --format, --byteswap, and --ahz can be used as a handy format converter. OPTIONS
-h, --help Prints the usage string and default locations of system files to standard output and exits. -n, --num recs Number of lines to print. -r, --reverse Start printing from last records. -R, --raw Print raw records, not human-readable. --format version Use specified format version to display records. --byteswap Swap bytes endianness when reading records. --ahz Use specified units of time to display data from other kernel versions and architectures. FILES
acct The system wide process accounting file. See acct(5) for further details. SEE ALSO
acct(5), ac(8). AUTHOR
The GNU accounting utilities were written by Noel Cragg <noel@gnu.ai.mit.edu>. This manual page was written by Ognyan Kulev <ogi@fmi.uni-sofia.bg> and updated by Daniel Baumann <daniel@debian.org> and Mathieu Trudel <mathieu.tl@gmail.com> for the Debian project (but may be used by others). 6.4pre1 2006-04-22 DUMP-ACCT(8)
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