1. 百分比
#!/bin/bash
a=38
b=99
percent_1=$(printf "%d%%" $((a*100/b)))
# 或者
percent_2=`awk 'BEGIN{printf "%.1f%%\n",('$a'/'$b')*100}'`
# 保留１位小数,四舍五入
echo $percent_1
echo $percent_2
2. 内存可用率低于20%的时候告警
[root@XWBizEngine04 0206]# cat /opt/0206/restart_mem.sh
#!/bin/bash
# author dxw
cur_datetime=`date +%Y%m%d-%H:%M:%S`
homeDir=`dirname $0`
echo $homeDir
function baojing {
curl -XPOST -s -L 'https://oapi.dingtalk.com/robot/send?access_token=e73b96f7d1bfa08e8d127sba730cfd1961bfefnishibash075b09262dbd3bf56d8b79' -H 'Content-Type: application/json' -H 'charset:utf-8' -d '{"msgtype": "text",
"text": {
"content": " '$1' mem less then 20%！http_code "
}
}'
}
#############检查CPU情况
ip=`/usr/sbin/ifconfig |grep broadcast |awk '{print $2}'`
MemAvailable=`cat /proc/meminfo |grep 'MemAvailable' |awk '{print $2}'`
MemTotal=`cat /proc/meminfo |grep 'MemTotal' |awk '{print $2}'`
percent_mem=`awk 'BEGIN{printf "%d\n",('$MemAvailable'/'$MemTotal')*100}'`
echo $percent_mem
if [ $percent_mem -lt 20 ]
then
cd /home/apaas/dynamic-bizengine && sh deploy.sh restart
baojing $ip
fi
[root@XWBizEngine04 0206]#
标签：mem,percent,相除,echo,0206,awk,内存,print,小数 From： https://www.cnblogs.com/hixiaowei/p/17110400.html