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Uptime

 
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Old 08-03-2008
alright here is a working solution I found (since I am only answering myself^^) if anybody is interested:

Code:
uptime | sed 's/.*up \(.*\),.*user.*/\1/' | awk  '{sub(":", " hours ", $0);  sub(" mins", " min", $0); sub(" secs", " sec", $0); sub("hrs", "hours", $0); sub(",", "", $0); print "uptime: " $0 " min"}' | awk ' {sub( "min min", "min", $0); sub( "hours min", "hours", $0); sub( "secs min", "sec", $0);  sub( "day min", "day", $0);  sub( "days min", "days", $0); print  $0}'


here is a short explanation: the second awk is there to get rid of unwanted output like secmin, minsmin, hoursmin etc.
so with two awk commands I got my desired output which looks like this

uptime: 3 days 9 hours 29 min
 
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LEARN ABOUT XFREE86

uptime

UPTIME(1)							   User Commands							 UPTIME(1)

NAME

       uptime - Tell how long the system has been running.

SYNOPSIS

       uptime [options]

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.

OPTIONS

       -p, --pretty
	      show uptime in pretty format

       -h, --help
	      display this help text

       -s, --since
	      system up since, in yyyy-mm-dd HH:MM:SS format

       -V, --version
	      display version information and exit

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>

SEE ALSO

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

REPORTING BUGS

       Please send bug reports to <procps@freelists.org>

procps-ng							   December 2012							 UPTIME(1)