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March 20, 2020 03:39
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get_cpu_mem_info.sh
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#!/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:2014-12-23 | |
logfile=/tmp/$0.log | |
check_os_release() | |
{ | |
while true | |
do | |
os_release=$(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 >>$logfile | |
dmesg -c | |
fi | |
sleep 10 | |
done | |
} | |
check_os_release | |
case "$os_release" in | |
redhat|centos|aliyun) | |
yum install bc -y | |
rhel_fun | |
;; | |
debian|ubuntu) | |
apt-get install bc -y | |
debian_fun | |
;; | |
esac |
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