阿里云提供的监测cpu和内存相关的一个shell脚本。
使用方式，直接放到/tmp下 然后运行
nohup bash get_cpu_mem_info.sh &
1,下载该文件解压后，上传到 /tmp 目录中。2,运行 cd 切换到/tmp目录。3,执行： nohup bash get_cpu_mem_info.sh &该工具会在 /tmp 目录下生成一个日志文件，记录实时监控系统的 CPU、内存的使用情况，等到系统异常时可以用于分析日志。
get_cpu_mem_info.sh
#!/bin/bash#When the free memory very less ,this script to collect CPU/memory usage information and dmessage information. #Version 1.0 time:2014-3-11#Version 2.0 time:2014-12-23logfile=/tmp/$0.logcheck_os_release(){ while true do os_release=$(grep "Red Hat Enterprise Linux Server release" /etc/issue 2>/dev/null) os_release_2=$(grep "Red Hat Enterprise Linux Server release" /etc/redhat-release 2>/dev/null) if [ "$os_release" ] && [ "$os_release_2" ] then if echo "$os_release"|grep "release" >/dev/null 2>&1 then os_release=redhat echo "$os_release" else os_release="" echo "$os_release" fi break fi os_release=$(grep "Aliyun Linux release" /etc/issue 2>/dev/null) os_release_2=$(grep "Aliyun Linux release" /etc/aliyun-release 2>/dev/null) if [ "$os_release" ] && [ "$os_release_2" ] then if echo "$os_release"|grep "release" >/dev/null 2>&1 then os_release=aliyun echo "$os_release" else os_release="" echo "$os_release" fi break fi os_release_2=$(grep "CentOS" /etc/*release 2>/dev/null) if [ "$os_release_2" ] then if echo "$os_release_2"|grep "release" >/dev/null 2>&1 then os_release=centos echo "$os_release" else os_release="" echo "$os_release" fi break fi os_release=$(grep -i "ubuntu" /etc/issue 2>/dev/null) os_release_2=$(grep -i "ubuntu" /etc/lsb-release 2>/dev/null) if [ "$os_release" ] && [ "$os_release_2" ] then if echo "$os_release"|grep "Ubuntu" >/dev/null 2>&1 then os_release=ubuntu echo "$os_release" else os_release="" echo "$os_release" fi break fi os_release=$(grep -i "debian" /etc/issue 2>/dev/null) os_release_2=$(grep -i "debian" /proc/version 2>/dev/null) if [ "$os_release" ] && [ "$os_release_2" ] then if echo "$os_release"|grep "Linux" >/dev/null 2>&1 then os_release=debian echo "$os_release" else os_release="" echo "$os_release" fi break fi break done}rhel_fun(){ while true do vm_mem=$(free -m|grep "buffers/cache"|awk '{print $4}') cpu=$(top -bn2|grep "Cpu(s)"|awk '{print $8}'|awk -F'%' '{print $1}'|tail -n1) check_cpu=$(echo "$cpu <20" |bc) if [[ $vm_mem -le 100 ]] || [[ $check_cpu -eq 1 ]] then echo "======================================================" >>$logfile date >>$logfile echo "======================================================" >>$logfile echo "The memory is too less." >>$logfile free -m >>$logfile echo "=======================CPU info========================" >>$logfile (ps aux|head -1;ps aux|sort -nrk3|grep -v "RSS") >>$logfile echo "=======================Memory info=====================" >>$logfile (ps aux|head -1;ps aux|sort -nrk6|grep -v "RSS") >>$logfile date >>$logfile echo "=======================Dmesg info=====================" >>$logfile dmesg >>$logfile dmesg -c fi sleep 10 done}debian_fun(){ while true do vm_mem=$(free -m|grep "buffers/cache"|awk '{print $4}') cpu=$(top -bn2|grep "Cpu(s)"|awk '{print $5}'|awk -F'%' '{print $1}'|tail -n1) check_cpu=$(echo "$cpu <20" |bc) if [[ $vm_mem -le 100 ]] || [[ $check_cpu -eq 1 ]] then echo "======================================================" >>$logfile date >>$logfile echo "======================================================" >>$logfile echo "The memory is too less." >>$logfile free -m >>$logfile echo "=======================CPU info========================" >>$logfile (ps aux|head -1;ps aux|sort -nrk3|grep -v "RSS") >>$logfile echo "=======================Memory info=====================" >>$logfile (ps aux|head -1;ps aux|sort -nrk6|grep -v "RSS") >>$logfile date >>$logfile echo "=======================Dmesg info=====================" >>$logfile dmesg >>$logfile dmesg -c fi sleep 10 done}check_os_releasecase "$os_release" inredhat|centos|aliyun) yum install bc -y rhel_fun ;;debian|ubuntu) apt-get install bc -y debian_fun ;;esac