概述

今天主要分享包含各种不同参数的 Shell 脚本，用来获取和监控 Linux 系统信息和资源使用率。

脚本

#! /bin/bash
# unset any variable which system may be using
# clear the screen
while getopts ivh name
do
 case $name in
 i)iopt=1;;
 v)vopt=1;;
 h)hopt=1;;
 *)echo "Invalid arg";;
 esac
done
# 
if [[ ! -z $iopt ]]
then
{
wd=$(pwd)
basename "$(test -L "$0" && readlink "$0" || echo "$0")" > /tmp/scriptname
scriptname=$(echo -e -n $wd/ && cat /tmp/scriptname)
su -c "cp $scriptname /usr/bin/monitor" root && echo "Congratulations! Script Installed, now run monitor Command" || echo "Installation failed"
}
fi
if [[ ! -z $vopt ]]
then
{
echo -e "tecmint_monitor version 0.1\nDesigned by Tecmint.com\nReleased Under Apache 2.0 License"
}
fi
if [[ ! -z $hopt ]]
then
{
echo -e " -i Install script"
echo -e " -v Print version information and exit"
echo -e " -h Print help (this information) and exit"
}
fi
if [[ $# -eq 0 ]]
then
{
clear
unset tecreset os architecture kernelrelease internalip externalip nameserver loadaverage
# Define Variable tecreset
tecreset=$(tput sgr0)
# Check if connected to Internet or not
ping -c 1 www.baidu.com &> /dev/null && echo -e '\E[32m'"Internet: $tecreset Connected" || echo -e '\E[32m'"Internet: $tecreset Disconnected"
# Check OS Type
os=$(uname -o)
echo -e '\E[32m'"Operating System Type :" $tecreset $os
# Check OS Release Version and Name
###################################
OS=`uname -s`
REV=`uname -r`
MACH=`uname -m`
GetVersionFromFile()
{
 VERSION=`cat $1 | tr "\n" ' ' | sed s/.*VERSION.*=\ // `
}
if [ "${OS}" = "SunOS" ] ; then
 OS=Solaris
 ARCH=`uname -p`
 OSSTR="${OS} ${REV}(${ARCH} `uname -v`)"
elif [ "${OS}" = "AIX" ] ; then
 OSSTR="${OS} `oslevel` (`oslevel -r`)"
elif [ "${OS}" = "Linux" ] ; then
 KERNEL=`uname -r`
 if [ -f /etc/redhat-release ] ; then
 DIST='RedHat'
 PSUEDONAME=`cat /etc/redhat-release | sed s/.*\(// | sed s/\)//`
 REV=`cat /etc/redhat-release | sed s/.*release\ // | sed s/\ .*//`
 elif [ -f /etc/SuSE-release ] ; then
 DIST=`cat /etc/SuSE-release | tr "\n" ' '| sed s/VERSION.*//`
 REV=`cat /etc/SuSE-release | tr "\n" ' ' | sed s/.*=\ //`
 elif [ -f /etc/mandrake-release ] ; then
 DIST='Mandrake'
 PSUEDONAME=`cat /etc/mandrake-release | sed s/.*\(// | sed s/\)//`
 REV=`cat /etc/mandrake-release | sed s/.*release\ // | sed s/\ .*//`
 elif [ -f /etc/debian_version ] ; then
 DIST="Debian `cat /etc/debian_version`"
 REV=""
 fi
 if ${OSSTR} [ -f /etc/UnitedLinux-release ] ; then
 DIST="${DIST}[`cat /etc/UnitedLinux-release | tr "\n" ' ' | sed s/VERSION.*//`]"
 fi
 OSSTR="${OS} ${DIST} ${REV}(${PSUEDONAME} ${KERNEL} ${MACH})"
fi
##################################
#cat /etc/os-release | grep 'NAME\|VERSION' | grep -v 'VERSION_ID' | grep -v 'PRETTY_NAME' > /tmp/osrelease
#echo -n -e '\E[32m'"OS Name :" $tecreset && cat /tmp/osrelease | grep -v "VERSION" | grep -v CPE_NAME | cut -f2 -d\"
#echo -n -e '\E[32m'"OS Version :" $tecreset && cat /tmp/osrelease | grep -v "NAME" | grep -v CT_VERSION | cut -f2 -d\"
echo -e '\E[32m'"OS Version :" $tecreset $OSSTR 
architecture=$(uname -m)
echo -e '\E[32m'"Architecture :" $tecreset $architecture
kernelrelease=$(uname -r)
echo -e '\E[32m'"Kernel Release :" $tecreset $kernelrelease
echo -e '\E[32m'"Hostname :" $tecreset $HOSTNAME
internalip=$(hostname -I)
echo -e '\E[32m'"Internal IP :" $tecreset $internalip
externalip=$(curl -s ipecho.net/plain;echo)
echo -e '\E[32m'"External IP : $tecreset "$externalip
nameservers=$(cat /etc/resolv.conf | sed '1 d' | awk '{print $2}')
echo -e '\E[32m'"Name Servers :" $tecreset $nameservers 
who>/tmp/who
echo -e '\E[32m'"Logged In users :" $tecreset && cat /tmp/who 
free -h | grep -v + > /tmp/ramcache
echo -e '\E[32m'"Ram Usages :" $tecreset
cat /tmp/ramcache | grep -v "Swap"
echo -e '\E[32m'"Swap Usages :" $tecreset
cat /tmp/ramcache | grep -v "Mem"
df -h| grep 'Filesystem\|/dev/sda*' > /tmp/diskusage
echo -e '\E[32m'"Disk Usages :" $tecreset 
cat /tmp/diskusage
loadaverage=$(top -n 1 -b | grep "load average:" | awk '{print $10 $11 $12}')
echo -e '\E[32m'"Load Average :" $tecreset $loadaverage
tecuptime=$(uptime | awk '{print $3,$4}' | cut -f1 -d,)
echo -e '\E[32m'"System Uptime Days/(HH:MM) :" $tecreset $tecuptime
unset tecreset os architecture kernelrelease internalip externalip nameserver loadaverage
rm /tmp/who /tmp/ramcache /tmp/diskusage
}
fi
# shift命令用于对参数的移动(左移)
shift $(($OPTIND -1))

执行结果：

后面会分享更多devops和DBA方面内容，感兴趣的朋友可以关注下！