Shell exercises to count memory usage

Demand:

Write a script that calculates the amount of memory that is consumed by all processes in the Linux system. (hint, use PS or TOP command)

#!/bin/bashtime= ' date +%y-%m-%d-%h:%m:%s ' # #方法一s =0for m in  ' ps aux |awk  ' { print $6} '  |grep -v  ' RSS ' Do ((s+= $m)) doneecho  "$time All processes memory-intensive and for   $s  k "  echo  "==========================" # #方法二sum =0for q in  ' ps aux |awk  ' { print $6} '  |grep -v  ' RSS ' dosum=$[$sum + $q]doneecho  "$time All processes consume memory and are   $sum  k "       echo " ======================== " # #方法三top  -bn1 | sed  ' 1,7 ' d >top.txtecho  "$time all processes that occupy memory and for   ' awk  ' {(zh=zh+$6)}; end {print  zh} '  top.txt '  k "echo " ========================= "# #方法四n = ' top -bn1 |sed  ' 1,7 ' d |awk  ' {(su=su+$6)}; END {PRINT SU} ' echo  ' $time all processes that occupy memory and for   $n  k "echo " ========================= "# # Method Five d= ' ps aux |grep -v  ' rss tty '  |awk  ' {(sum=sum+$6)}; End&nbSp {print sum} ' echo  ' $time All processes are memory-intensive and   $d  k  "

Shell exercises to count memory usage