本文共 5837 字，大约阅读时间需要 19 分钟。

1. 主要命令

1.1 uname(查看系统相关信息)

uname [选项]

1.2 free(查看内存)

free [选项]

1.3 vmstat(系统运行状态)

vmstat [选项] [参数]

选项：

参数：

事件间隔：状态信息刷新的时间间隔

次数：显示报告的次数

1.4 df(查看磁盘)

df [选项]

其余还有一些重要的命令，如sed，在这里就不加赘述。

2. 完整代码

#! /bin/bash# unset any variable which system may be using# clear the screen# 5个参数：-i(安装), -v(版本信息), -m(内存)，-d(磁盘)，-h(帮助信息)while getopts ivmdh namedo        case $name in          i)iopt=1;;          v)vopt=1;;          m)mopt=1;;          d)dopt=1;;          h)hopt=1;;         *)echo "Invalid arg";;        esacdone# -i(安装)：将脚本添加到环境的目录里if [[ ! -z $iopt ]]then{wd=$(pwd)# basename：去掉路径；test -L：判断是否为符号链接；readlink：找出符号链接所指向的位置# 符号链接（软连接）相当于Windows中的快捷方式basename "$(test -L "$0" && readlink "$0" || echo "$0")" > /tmp/scriptname# scriptname就是脚本的地址scriptname=$(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# -v(版本信息)：打印版本信息if [[ ! -z $vopt ]]then{echo -e "tecmint_monitor version 0.2\nDesigned by Tecmint.com\nReleased Under Apache 2.0 License"}fi# -m(内存信息)：打印内存信息if [[ ! -z $mopt ]]then{memory=$(vmstat -S M 1 2 | sed 's\memory\memory(MB)\')echo "$memory"}fi# -d(磁盘信息)：打印磁盘信息if [[ ! -z $dopt ]]then{echo "`df -h --total`"}fi# -h(帮助信息)：打印帮助信息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"}fiif [[ $# -eq 0 ]]then{clear# unset删除已定义的shell变量，防止冲突unset tecreset os architecture kernelrelease internalip externalip nameserver loadaverage# 定义变量tecreset# tput：创建自定义输出，如移动或更改光标、更改文本属性、更改字体颜色等。# tput sgr0：正常输出tecreset=$(tput sgr0)# 查看是否能够联网# \E[32m：将字体颜色改变为绿色，\033[32m 同样可以ping -c 1 www.baidu.com &> /dev/null && echo -e '\E[32m'"Internet: $tecreset Connected" || echo -e '\E[32m'"Internet: $tecreset Disconnected"# 查看系统类型os=$(uname -o)echo -e '\E[32m'"Operating System Type :" $tecreset $os# 查看系统版本和名称# uname：获取电脑和操作系统的相关信息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 $OSSTR # 查看系统架构architecture=$(uname -m)echo -e '\E[32m'"Architecture :" $tecreset $architecture# 查看内核版本kernelrelease=$(uname -r)echo -e '\E[32m'"Kernel Release :" $tecreset $kernelrelease# 查看主机名echo -e '\E[32m'"Hostname :" $tecreset $HOSTNAME# 查看内网IPinternalip=$(hostname -I)echo -e '\E[32m'"Internal IP :" $tecreset $internalip# 查看外网IPexternalip=$(curl -s ipecho.net/plain;echo)echo -e '\E[32m'"External IP : $tecreset "$externalip# 查看域名服务器nameservers=$(cat /etc/resolv.conf | sed '1 d' | awk '{print $2}')echo -e '\E[32m'"Name Servers :" $tecreset $nameservers # 查看登录用户who>/tmp/whoecho -e '\E[32m'"Logged In users :" $tecreset && cat /tmp/who # 查看内存free -h | grep -v + > /tmp/ramcacheecho -e '\E[32m'"Ram Usages :" $tecresetcat /tmp/ramcache | grep -v "Swap"echo -e '\E[32m'"Swap Usages :" $tecresetcat /tmp/ramcache | grep -v "Mem"# 查看磁盘df -h| grep 'Filesystem\|/dev/sda*' > /tmp/diskusageecho -e '\E[32m'"Disk Usages :" $tecreset cat /tmp/diskusage# 查看负载loadaverage=$(top -n 1 -b | grep "load average:" | awk '{print $10 $11 $12}')echo -e '\E[32m'"Load Average :" $tecreset $loadaverage# 查看系统运行时间tecuptime=$(uptime | awk '{print $3,$4}' | cut -f1 -d,)echo -e '\E[32m'"System Uptime Days/(HH:MM) :" $tecreset $tecuptime# 删除变量，释放资源unset tecreset os architecture kernelrelease internalip externalip nameserver loadaverage# 删除临时文件rm /tmp/who /tmp/ramcache /tmp/diskusage}fishift $(($OPTIND -1))# shift命令用于对参数的移动(左移).

3. 运行结果

本篇文章主要参考了以下内容：

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