Linux系统资源及账户安全监测脚本

4rweq2

#!/bin/bash
#Created by liter on 2014/7/11

PATH=/opt/jdk1.6.0_45/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
export PATH

#CPU INFO

id_cpu=`top -b -d 2 -n 10 | grep Cpu | grep -v grep | cut -d ',' -f 4 | tr -d -c '0-9.\n' | sort -n | head -n 1`
use_cpu=`echo "100-$id_cpu" | bc`
echo -e "\e[32m******************************************************* \e[0m"
echo -e "\e[1;42m CPU INFO \e[0m"
echo -e "if($id_cpu<=20) print \"CPU has been used in \e[31m$use_cpu%, more than 80%\e[0m\n\" else print \"CPU has been used in \e[31m$use_cpu%, less than 80%\e[0m\n\"" | bc
echo -e "\e[32m******************************************************* \e[0m"


#MEM INFO

total_mem=`free -m | grep Mem | tr -d -c '0-9 \n' | tr -s ' ' | cut -d ' ' -f 2`
used_mem=`free -m | grep Mem | tr -d -c '0-9 \n' | tr -s ' ' | cut -d ' ' -f 3`
free_mem=`free -m | grep Mem | tr -d -c '0-9 \n' | tr -s ' ' | cut -d ' ' -f 4`
buffers_mem=`free -m | grep Mem | tr -d -c '0-9 \n' | tr -s ' ' | cut -d ' ' -f 6`
cached_mem=`free -m | grep Mem | tr -d -c '0-9 \n' | tr -s ' ' | cut -d ' ' -f 7`
numerator=$[ $used_mem - $buffers_mem - $cached_mem ]
float=`echo "scale=2;$numerator/$total_mem" | bc`
int_float=`echo "$float * 100" | bc`
echo -e "\e[1;42m MEM INFO \e[0m"
echo "total_mem is $total_mem M"
echo "used_mem is $used_mem M"
echo "true_used_mem is $numerator M"
echo "buffers_mem is $buffers_mem M"
echo "cached_mem is $cached_mem M"
echo -e "if($int_float>=80) print \"MEM has been used in \e[31m$int_float%, more than 80%\e[0m\n\" else print \"MEM has been used in \e[31m$int_float%, less than 80%\e[0m\n\"" | bc
echo -e "\e[32m******************************************************* \e[0m"


#SWAP INFO

echo -e "\e[1;42m SWAP INFO \e[0m"
total_swap=`free -m | grep Swap | tr -d -c '0-9 \n' | tr -s ' ' | cut -d ' ' -f 2`
if [ $total_swap -eq 0 ];then
    echo -e "\e[31mswap is unavailable\e[0m"
else
    used_swap=`free -m | grep Swap | tr -d -c '0-9 \n' | tr -s ' ' | cut -d ' ' -f 3`
    free_swap=`free -m | grep Swap | tr -d -c '0-9 \n' | tr -s ' ' | cut -d ' ' -f 4`
    float_swap=`echo "scale=2;$used_swap/$total_swap" | bc`
    echo "total_swap is $total_swap M"
    echo "used_swap is $used_swap M"
    percentage_swap=`echo "float_swap * 100" | bc`
    echo -e "SWAP has been used in \e[31m$percentage_swap%\e[0m"
fi
echo -e "\e[32m******************************************************* \e[0m"


#DISK INFO

echo -e "\e[1;42m DISK INFO \e[0m"
df -Th
echo -e "\e[32m******************************************************* \e[0m"


#PASSWD TABLE

echo -e "\e[1;42m PASSWORD TABLE INFO \e[0m"
passwd="/root/.passwd"
if [ ! -f "$passwd" ];then
    cp /etc/passwd /root/.passwd
    chattr +i /root/.passwd
fi
diff /root/.passwd /etc/passwd
if [ $? -eq 0 ];then
    echo -e "\e[31m/etc/passwd have no change\e[0m"
else
    echo -e "\e[31m/etc/passwd maybe changed\e[0m"
fi
echo -e "\e[32m******************************************************* \e[0m"