Nagios Plugin-monitor network speed

#! /Bin/bash
Progname = 'basename $0'
Version = "version 1.0"
Author = "2013.02.05, www.mangocity.com"

St_ OK = 0
St_wr = 1
St_cr = 2
St_uk = 3

Interval = 10
Url = "http://mirrors.163.com/centos/6.3/isos/x86_64/CentOS-6.3-x86_64-LiveCD.iso"

Print_version (){
Echo "$ version $ Author"
}

Print_help (){
Print_version $ progname $ version
Echo "$ progname is a Nagios plugin to monitor download speed"
Echo "use of wget download URL File"
Echo "when using optional warning/critical thresholds all values limit t"
Echo "usage parameters :"
Echo ""
Echo "$ progname [-I/-- interval] [-u | -- url] [-W/-- warning] [-C/-- Critical]"
Echo ""
Echo "Options :"
Echo "-- interval |-I )"
Echo "defines the download file times"
Echo "propose set <5 second and> 10 second"
Echo "default is: 5 second"
Echo ""
Echo "-- URL |-u )"
Echo "sets URL page"
Echo "defautl is: http://mirrors.163.com/centos/6.3/isos/x86_64/CentOS-6.3-x86_64-LiveCD.iso"
Echo "Please set fastest URL"
Echo ""
[Root @ uat04 ~] #./Check_speed.sh-W 500-C 450
Warning-speed: 489 | 'speed' = 489
[Root @ uat04 ~] #./Check_speed.sh-W 600-C 500
OK-speed: 744 | 'speed' = 744
[Root @ uat04 ~] #./Check_speed.sh-W 600-C 500
OK-speed: 652 | 'speed' = 652
[Root @ uat04 ~] #./Check_speed.sh-W 800-C 700
Critical-speed: 18 | 'speed' = 18
[Root @ uat04 ~] #./Check_speed.sh-W 800-C 700
Critical-speed: 622 | 'speed' = 622
[Root @ uat04 ~] # Vi./check_speed.sh
#! /Bin/bash
Progname = 'basename $0'
Version = "version 1.0"
Author = "2010.11.17, www.nginxs.com"

St_ OK = 0
St_wr = 1
St_cr = 2
St_uk = 3

Interval = 10
Url = "http://mirrors.163.com/centos/6.3/isos/x86_64/CentOS-6.3-x86_64-LiveCD.iso"

Print_version (){
Echo "$ version $ Author"
}

Print_help (){
Print_version $ progname $ version
Echo "$ progname is a Nagios plugin to monitor download speed"
Echo "use of wget download URL File"
Echo "when using optional warning/critical thresholds all values limit t"
Echo "usage parameters :"
Echo ""
Echo "$ progname [-I/-- interval] [-u | -- url] [-W/-- warning] [-C/-- Critical]"
Echo ""
Echo "Options :"
Echo "-- interval |-I )"
Echo "defines the download file times"
Echo "propose set <5 second and> 10 second"
Echo "default is: 5 second"
Echo ""
Echo "-- URL |-u )"
Echo "sets URL page"
Echo "defautl is: http://mirrors.163.com/centos/6.3/isos/x86_64/CentOS-6.3-x86_64-LiveCD.iso"
Echo "Please set fastest URL"
Echo ""
Echo "-- warning |-W )"
Echo "sets a warning level for download speed. defautl is: off"
Echo ""
Echo "-- Critical |-C )"
Echo "sets a critical level for download speed. defautl is: off"
Exit $ st_uk
}

While test-n "$1"; do
Case "$1" in
-- Help |-h)
Print_help
Exit $ st_uk
;;
-- URL |-U)
Url = $2
Shift
;;
-- Interval |-I)
Interval = $2
Shift
;;
-- Warning |-W)
Warn = $2
Shift
;;
-- Critical |-C)
Crit = $2
Shift
;;
*)
Echo "unknown argument: $1"
Print_help
Exit $ st_uk
;;
Esac
Shift
Done

Val_wcdiff (){
If [$ {warn}-lt $ {crit}]
Then
Wcdiff = 1
Fi
}

Get_speed (){
Wget-B $ URL>/dev/null
Sleep $ Interval
BS = "'cat wget-log | tail-N20 | awk '{print $8}' | SED's/K // '| awk' {sum + = $1}; end {print sum }''"
Speed = 'echo $ Bs/19 | bc'
Killall wget
Rm centos *
Rm wget-Log
}
Do_output (){
Output = "Speed: $ {speed }"
}
Do_perfdata (){
Perfdata = "'speed' =$ {speed }"
}

If [-n "$ warn"-a-n "$ crit"]
Then
Val_wcdiff
If ["$ wcdiff" = 1]; then
Echo "Please adjust your warning/critical thresholds. The critical must be lower than the warning level! "
Exit $ st_uk
Fi
Fi

Get_speed
Do_output
Do_perfdata

If [-n "$ warn"-a-n "$ crit"]; then
If [$ speed-Le $ warn-A $ speed-GT $ crit]; then
Echo "WARNING-$ output | $ perfdata"
Exit $ st_wr
Elif [$ speed-lt $ crit]; then
Echo "critical-$ output | $ perfdata"
Exit $ st_cr
Else
Echo "OK-$ output | $ perfdata"
Exit $ st_ OK
Fi
Else
Echo "OK-$ output | $ perfdata"
Exit $ st_ OK
Fi