Shell programming disk monitoring (evaluate the available space depletion time, mail to the Administrator)

Shell programming disk monitoring (evaluation of available space depletion time, mail Notification to the Administrator) sets the monitoring disk to/dev/md0; if the file system usage is greater than 90%, the three functions are called in sequence to estimate the time used up by the file system, and the results are sent to the Administrator. #! /Bin/bash # This script is used to monitor disk. #6/20/11 # define the write speed of the function compute file system function disk_speed () {A = 'df-k | grep "$1" | awk '{print $3} ''sleep 30 B = 'df-k | grep" $1 "| awk' {print $3} 'd = 'expr $ B-$ a' SPEED = 'expr $ D/30' echo $ SPEED unset a B D SPEED} # define estimated disk space depletion time function avai_time () {FREE = 'df-k | grep "$1" | awk '{print $4} ''if TIME = 'expr $ FREE/$ 2' then if [$ TIME- ge 60] then A = 'expr $ TI ME/60' echo $ A "minutes" unset free time return 0 else echo "Unknow" unset free time return 0 fi else echo "Unknow" unset free time return 1 fi} # Definition function content () {TEMP_FILE =/root/disk_monitor.tmp echo "Warning disk:" $1> $ TEMP_FILE echo "Used space:" $2 >>$ TEMP_FILE echo "Available space: "$3 >>$ TEMP_FILE echo" Use %: "$4" % ">>$ TEMP_FILE echo" Write speed: "$5 >>$ TEMP_FILE echo" Estimated Time remaining: "$6 >>$ TEMP_FILE echo" Now time: "'date +" % Y-% m-% d % H: % M "'> $ TEMP_FILE unset TEMP_FILE return 0} # define the file system to be monitored MON_DISK =/dev/md0USED = 'df-h | grep" $ MON_DISK "| awk' {print $5} '| sed's/% // ''# determines whether the usage rate is greater than 90%, if yes, run the statement after then if [$ USED-ge 90] then USED_SPACE = 'df-h | grep "$ MON_DISK" | awk '{print $4} ''avai_space =' df-h | grep "$ MON_DISK" | awk '{print $3} ''W_SPEED = 'disk _ speed $ MON_DIS K'if [$ W_SPEED! = 0] then S_TIME = 'avai _ time $ MON_DISK $ w_speed' else S_TIME = "Unknow" fi content $ MON_DISK $ USED_SPACE $ AVAI_SPACE $ USED $ W_SPEED $ S_TIME mail-s "Disk "warning "root </root/disk_monitor.tmp rm-rf/root/disk_monitor.tmp unset MON_DISK USED USED_SPACE AVAI_SPACE W_SPEED S_TIMEfi