二个linux下查看内存使用情况的shell脚本(图文)

#!/bin/bash
#filename chk_memory.sh
#edit by www.jb200.com
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