效果
脚本（复制粘贴）
#!/bin/bash
echo
a="\033[40;37m"
e="\033[0m"
b="\033[41;37m"
c="\033[42;37m"
f="\033[43;37m"
g="\033[44;37m"
h="\033[45;37m"
q="\033[46;37m"
cron=`crontab -l`
echo -e $a 'This is a private server,please leave,thanke you!' $e
echo
echo -e $a Welcome $USER To Login To This Server! $e
echo
LoginUserNum=`who | wc -l`
OpenProcesNum=$(expr $(ps aux | wc -l) - 1)
FreeMem=`free -m | grep Mem: | awk '{print $4}'`
FreeBuffers=`free -m | grep - | awk '{print $3}'`
FreeCache=`free -m | grep - | awk '{print $4}'`
FreeSwap=`free -m | grep Swap: | awk '{print $4}'`
echo -e " $a number of login users '(用户数量)': $e" $LoginUserNum
echo -e " $b $LoginUserNum $e"
echo -e " $a numbre of running processes '(进程)': $e" $OpenProcesNum
echo -e " $f $OpenProcesNum $e"
echo -e " $a free memory size '(mb 可用内存)': $e" $FreeMem
echo -e " $c $FreeMem $e"
echo -e " $a free buffers size'(mb 内存可用缓存)': $e" $FreeBuffers
echo -e " $g $FreeBuffers $e"
echo -e " $a free cache'(mb 可用缓存)': $e" $FreeCache
echo -e " $h $FreeCache $e"
echo -e " $a free swap space size '(mb 交换内存)': $e" $FreeSwap
echo -e " $q $FreeSwap $e"
echo -e " $a view crontab $e "
echo -e " $b $cron $e"
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