初学者建议可以看《linux就该这么学》，这本书针对rhel7编写，能够然呢快速掌握linux系统的知识，学会shell脚本的书写。
#script to check real memory usage
# L.Gill 02/05/06 - V.1.0
# ---
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---------------------------------------# ######## Script Modifications ##########
# ------------------------------------------
# Who When What
# --- ---- ----
# LGill 17/05/06 $percent lt 1
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.#
#
#!/bin/bash
USAGE=`basename $0` [-
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w|--warning]percent free [-c|--critical]percent freeTHRESHOLD_USAGE=WARNING threshold must be greater than CRITICAL: `basename $0` $*
calc=/tmp/memcalc
percent_free=/tmp/mempercent
critical=
warning=
STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3
# print usage
if [[ $# -lt 4 ]]
then
echo
echo Wrong Syntax: `basename $0` $*
echo
echo Usage: $USAGE
echo
exit 0
fi
# read input
while [[ $# -gt 0 ]]
do
case $1 in
-w|--warning)
shift
warning=$1
;;
-
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c|--critical)shift
cri
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tical=$1;;
esac
shift
done
# verify input
if [[ $warning -eq $critical |
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| $warning -lt $critical ]]then
echo
echo $THRESHOLD_USAGE
echo
echo Usage: $USAGE
echo
exit 0
fi
# Total memory available
total=`free -m | head -2 |tail -1 |gawk '{print $2}'`
# Total memory used
used=`free -m | head -3 |tail -1 |gawk &
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#39;{print $3}'`# Calc total minus used
free=`free -m | head -3 |tail -1 |gawk
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'{print $4}'`# normal values
#echo $totalMB total
#echo $usedMB used
#echo $freeMB free
# make it into % percent free = ((free mem / total mem) * 100)
echo 5 $calc # decimal accuracy
echo k $calc # commit
echo 100 $calc # multiply
echo $free $calc # division integer
echo $total $calc # division integer
echo / $calc # division sign
echo * $calc # multiplication sign
echo p $calc # print
percent=`/usr/bin/dc $calc|/bin/sed 's/^\./0./'|/usr/bin/tr . |/usr/bin/gawk {'print $1'}`
#percent1=`/usr/bin/dc $calc`
#echo $percent1
if [[ $percent -le $critical ]]
then
echo CRITICAL - $free MB ($percent%) Free Memory
exit 2
fi
if [[ $percent -le $warning ]]
then
echo WARNING - $free MB ($percent%) Free Memory
exit 1
fi
if [[ $percent -gt $warning ]]
then
echo OK - $free MB ($percent%) Free Memory
exit 0
fi
你说的这两个真没什么可学的...
shel
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l 编程网上教材很多，随便搜一个，就可以学习，顶多一个月,搞定...至于应用，不太明白有什么好学的，就是工具而已么
放弃windows，全用linux
shell是linux里面带的，linux都没装哪里来的shell。
安装linux可以用安装光盘，或者把安装镜像做成u盘启动盘安装。
用top命令。
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