03-02-2010
finding greatest value in a column using awk from iostat output in linux
Friends,
.
On linux i have to run iostat command and in each iteration have to print the greatest value in each column.
e.g
iostat -dt -kx 2 2 | awk ' !/sd[a-z][0-9]/ &&!/%util/ && !/Time/ && !/Linux/ {print $12}'
4.38
0.00
0.00
0.00
What i would like to print is only the greatest value in each iteration. Can someone guide me with this.
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Friends,
Need some help.
On linux i have to run iostat command and in each iteration have to print the greatest value in each column.
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4.38
0.00
0.00
0.00
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WDCTL(8) System Administration WDCTL(8)
NAME
wdctl - show hardware watchdog status
SYNOPSIS
wdctl [options] [device...]
DESCRIPTION
Show hardware watchdog status. The default device is /dev/watchdog. If more than one device is specified then the output is separated by
one blank line.
Note that number of supported watchdog features is hardware specific.
OPTIONS
-f, --flags list
Print selected flags only.
-F, --noflags
Do not print information about flags.
-n, --noheadings
Do not print a header line for flags table.
-I, --noident
Do not print watchdog identity information.
-T, --notimeouts
Do not print watchdog timeouts.
-s, --settimeout seconds
Set the watchdog timeout in seconds.
-o, --output list
Define the output columns to use in table of watchdog flags. If no output arrangement is specified, then a default set is used.
Use --help to get list of all supported columns.
-O, --oneline
Print all wanted information on one line in key="value" output format.
-V, --version
Output version information and exit.
-r, --raw
Use the raw output format.
-x, --flags-only
Same as -I -T.
-h, --help
Print a help text and exit.
AUTHORS
Karel Zak <kzak@redhat.com>
Lennart Poettering <lennart@poettering.net>
AVAILABILITY
The wdctl command is part of the util-linux package and is available from Linux Kernel Archive <ftp://ftp.kernel.org/pub/linux/utils/util-
linux/>.
util-linux June 2012 WDCTL(8)