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Full Discussion: Issue with awk command between Linux and Solaris
Top Forums Shell Programming and Scripting Issue with awk command between Linux and Solaris Post 302998615 by mohtashims on Monday 5th of June 2017 05:05:26 AM
Old 06-05-2017
Hammer & Screwdriver Issue with awk command between Linux and Solaris
Hi,

Here is the output using bash profile on Linux

Code:
 uptime
 04:59:14 up 16 days,  4:48,  2 users,  load average: 1.00, 1.00, 1.20

Here is the output using bash profile on Solaris

Code:
uptime
  4:00am  up 84 day(s), 22:21,  3 users,  load average: 0.09, 0.10, 0.12

Now, I m looking for a generic command to extract the average CPU Load which is the third column highlighted in BOLD RED

I tried the below command

Code:
uptime | awk -F" ,"  '{print $(NF-2)}' | cut -d ',' -f1

This works fine on Solaris but fails on Linux with the below error

Code:
awk: cmd. line:1: (FILENAME=- FNR=1) fatal: attempt to access field -1

Can you please help with a solution ?
 

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LEARN ABOUT LINUX

uptime

UPTIME(1)							Linux User's Manual							 UPTIME(1)

NAME

       uptime - Tell how long the system has been running.

SYNOPSIS

       uptime
       uptime [-V]

DESCRIPTION

       uptime  gives  a one line display of the following information.	The current time, how long the system has been running, how many users are
       currently logged on, and the system load averages for the past 1, 5, and 15 minutes.

       This is the same information contained in the header line displayed by w(1).

       System load averages is the average number of processes that are either in a runnable or uninterruptable state.	A process  in  a  runnable
       state  is either using the CPU or waiting to use the CPU. A process in uninterruptable state is waiting for some I/O access, eg waiting for
       disk.  The averages are taken over the three time intervals.  Load averages are not normalized for the number of CPUs in  a  system,  so  a
       load average of 1 means a single CPU system is loaded all the time while on a 4 CPU system it means it was idle 75% of the time.

FILES

       /var/run/utmp
	      information about who is currently logged on

       /proc  process information

AUTHORS

       uptime was written by Larry Greenfield <greenfie@gauss.rutgers.edu> and Michael K. Johnson <johnsonm@sunsite.unc.edu>.

       Please send bug reports to <albert@users.sf.net>

SEE ALSO

       ps(1), top(1), utmp(5), w(1)

Cohesive Systems						    26 Jan 1993 							 UPTIME(1)
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