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Top Forums Shell Programming and Scripting Adding a specified value to a specified column - awk? Post 302791419 by Corona688 on Monday 8th of April 2013 01:32:06 PM
Old 04-08-2013
awk uses 32-bit floating point numbers, its precision is not infinite. By default it prints to 6 digits, but this can be controlled by the CONVFMT variable. Hopefully this works for your need:
Code:
awk 'NF==4 {$COL += VAL } 1' COL=$1 VAL=$2 CONVFMT="%.8f" $3 > "$3.shifted"

This User Gave Thanks to Corona688 For This Post:
 

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IP-NTABLE(8)							       Linux							      IP-NTABLE(8)

NAME
ip-ntable - neighbour table configuration SYNOPSIS
ip [ OPTIONS ] address { COMMAND | help } ip ntable change name NAME [ dev DEV ] PARMS PARMS := { thresh1 VAL | thresh2 VAL | thresh3 VAL | gc_int MSEC | base_reachable MSEC | retrans MSEC | gc_stale MSEC | delay_probe MSEC | queue LEN | app_probs VAL | ucast_probes VAL | mcast_probes VAL | anycast_delay MSEC | proxy_delay MSEC | proxy_queue LEN | locktime MSEC } ip ntable show [ dev DEV ] [ name NAME ] DESCRIPTION
ip ntable controls the parameters for the neighbour tables. ip ntable show - list the ip neighbour tables This commands displays neighbour table parameters and statistics. dev DEV only list the table attached to this device. name NAME only lists the table with the given name. ip ntable change - modify table parameter This command allows modifying table parameters such as timers and queue lengths. name NAME the name of the table to modify. dev DEV the name of the device to modify the table values. EXAMPLES
ip ntable show dev eth0 Shows the neighbour table (IPv4 ARP and IPv6 ndisc) parameters on device eth0. ip ntable change name arp_cache queue 8 dev eth0 Changes the number of packets queued while address is being resolved from the default value (3) to 8 packets. SEE ALSO
ip(8) AUTHOR
Manpage by Stephen Hemminger iproute2 20 Dec 2011 IP-NTABLE(8)
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