#!/bin/bash
#filename chk_memory.sh

echo -n "PidName   " > /tmp/pid.f
echo    "MeMery    " >> /tmp/pid.f

PIDPATH=/proc/
TOTLE=0
cd $PIDPATH
DOC=`ls`
  for DOCNAME in $DOC
    do
       if [ -d $DOCNAME ]; then
         cd $DOCNAME
            if [ -f status ];then
              MEMERY=`grep VmRSS status | awk -F':' '{print $2}' | awk '{print $1}'`
              PIDNAME=`grep Name status | awk -F':' '{print $2}'`
              if [ $MEMERY ]; then
                echo -n $PIDNAME >> /tmp/pid.f
                echo -n "   "    >> /tmp/pid.f
                echo    $MEMERY  >> /tmp/pid.f
                TOTLE=`expr $TOTLE + $MEMERY`
                cd ..
               else
                cd ..
              fi
              else
               cd ..
            fi
       fi
  done
TOTLE=`expr $TOTLE / 1024`
echo "TOTLE USERD: $TOTLE MB" >> /tmp/pid.f
cat  /tmp/pid.f

#!/bin/bash  
# File Name: checkMem.sh  
#fetch and process memory information  
[ -f /proc/meminfo ] && {  #First judge whether the file exists  
#-e是模式的意思，常用来保护以破折号开头的模式。  
#-w是全字匹配。  
#-i忽略大小写。  
#-d指定分割符，-f为按照分割符取出的域，2-指的是域2及以后  
Buffers=`grep -we 'Buffers' /proc/meminfo | cut -d' ' -f2- | tr -d "[A-Z][a-z] "`  
Cached=`grep -we 'Cached' /proc/meminfo | cut -d' ' -f2- | tr -d "[A-Z][a-z] "`  
MemFree=`grep -ie 'MemFree' /proc/meminfo | cut -d' ' -f2- | tr -d "[A-Z][a-z] "`  
MemTotal=`grep -ie 'MemTotal' /proc/meminfo | cut -d' ' -f2- | tr -d "[A-Z][a-z] "`  
SwapCached=`grep -ie 'SwapCached' /proc/meminfo | cut -d' ' -f2- | tr -d "[A-Z][a-z] "`  
SwapFree=`grep -ie 'SwapFree' /proc/meminfo | cut -d' ' -f2- | tr -d "[A-Z][a-z] "`  
SwapTotal=`grep -ie 'SwapTotal' /proc/meminfo | cut -d' ' -f2- | tr -d "[A-Z][a-z] "`  
}  
  
MEMUSED="$(( ( ( ( $MemTotal - $MemFree ) - $Cached ) - $Buffers ) / 1024 ))"  
MEMTOTAL="$(( $MemTotal / 1024))"  
MEMFREE="$(( $MEMTOTAL - $MEMUSED ))"  
MEMPER="$(( ( $MEMUSED * 100 ) / $MEMTOTAL ))"  
[ "$SwapTotal" -gt "1" ] && {  
  SWAPUSED="$(( ( ( $SwapTotal - $SwapFree ) - $SwapCached ) / 1024 ))"  
  SWAPTOTAL="$(( $SwapTotal / 1024))"  
  SWAPFREE="$(( $SWAPTOTAL - $SWAPUSED ))"  
  SWAPPER="$(( ( $SWAPUSED * 100 ) / $SWAPTOTAL ))"   
} || {  
  SWAPUSED="0"  
  SWAPTOTAL="0"  
  SWAPPER="0"   
}  
  
# display the information  
/bin/echo  
/bin/echo "Memory"  
/bin/echo "Used: $MEMUSED MB"  
/bin/echo "Free: $MEMFREE MB"  
/bin/echo "Total: $MEMTOTAL MB"  
/bin/echo  
/bin/echo "Swap"  
/bin/echo "Used: $SWAPUSED MB"  
/bin/echo "Free: $SWAPFREE MB"  
/bin/echo "Total: $SWAPTOTAL MB"  
/bin/echo