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cache和buffer的區(qū)別

內(nèi)在中cache和buffer的區(qū)別

查看系統(tǒng)的運行狀態(tài)

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Cache和buffer的區(qū)別！

#!/bin/bash

if [[ $# -eq 0 ]]

then

# Define Variable reset_terminal

#字體顏色

#深綠

fontColor='\E[36m'

#黃色

font2Color='\E[33m'

#閃爍

hostnameColor='\E[34m'

hostnameAction='\E[5m'

#綠色

successFulColor='\E[32m'

#紅色

failColor='\E[31m'

#使用終端的默認顏色 白色

reset=$(tput sgr0)

# Check OS Type

os=$(uname -o)

echo -e $fontColor "Operating System Type :" $reset $os

# Check OS Release Version and Name

relVersionName=$(cat /etc/centos-release)?

echo -e $fontColor? "OS Release Version and Name :" $reset $relVersionName

# Check Architecture CPU 的架構

arc=$(uname -m)

# 操作系統(tǒng)位數(shù)

osBit=$(getconf LONG_BIT)

echo -e $fontColor? "Architecture :" $reset $arc'_'$osBit

# Check Kernel Release

kernelRel=$(uname -r)

echo -e $fontColor "Kernel Release :" $reset $kernelRel

# Check hostname

# hostname=$(hostname)

# hostname=$($HOSTNAME)

hostname=$(uname -n)

echo -e $fontColor? "HostName :" $hostnameAction $hostnameColor $hostname $reset

# Check Internal IP

iip=$(hostname -I)?

echo -e $fontColor "Internal IP :"? $font2Color? $iip $reset

# Check External IP

eip=$(curl -s http://ipecho.net/plain)

echo -e $fontColor "External IP :"? $font2Color? $eip $reset

# Check DNS

# nameservers=$(awk '/nameserver/{print $2}' /etc/resolv.conf)

nameservers=$(cat /etc/resolv.conf | grep -E "\<nameserver[ ]+"| awk '{print $NF}')

echo -e $fontColor "NameServers? :" $font2Color $nameservers $reset

# Check if connected to Internet or not

ping -c 3? www.baidu.com &>/dev/null && echo -e $fontColor "Connect Status: " $successFulColor "Connected" || echo -e $fontColor "Connect Status: " $failColor "Disconnected"

# Check Logined In Users

who>/tmp/who

echo -e $fontColor "Logined In Users :"$reset && cat /tmp/who

rm -f /tmp/who

#系統(tǒng)內(nèi)存的使用情況

system_memory_usages=$(awk '/MemTotal/{total=$2}/MemFree/{free=$2}END{print (total-free)/1024}' /proc/meminfo)

echo -e $fontColor "System Memuserages :? "$reset $system_memory_usages "M"

#應用內(nèi)存的使用情況

apps_memory_usages=$(awk '/MemTotal/{total=$2}/MemFree/{free=$2}/Buffers/{buffers=$2}/^Cached/{cached=$2}END{print (total-free-buffers-cached)/1024}' /proc/meminfo)

echo -e $fontColor "Apps Memuserages : "$reset $apps_memory_usages "M"

# CPU 負載情況

#loadaverge=$(top -n 1 -b | grep "load average:" | awk '{print $10 $11 $12}')

#loadaverge=$(w | grep "load average:"| awk 'BEGIN{FS="average:"}{print $2}')

loadaverge=$(w | grep 'load average' | awk '{print $8 $9 $10}')

echo -e $fontColor "Load Averge : "$reset $loadaverge

# CPU 溫度

temp=$(cat /sys/class/thermal/thermal_zone0/temp)

rpi_temp=$(echo "$temp 1000" | awk '{print $1/$2}')

echo -e $fontColor "CPU Temperature : "$reset $rpi_temp "℃"

# 磁盤的使用情況

#disk_usages=$(df -h | grep -vE '文件系統(tǒng)|tmpfs'|awk "{print $1 $2 $4 $3 $5}")

df -hP | grep -vE 'tmpfs'>/tmp/disk_usages

echo -e $fontColor "Disk Usages : "$reset && cat /tmp/disk_usages

rm -f /tmp/disk_usages

fi

分析操作系統(tǒng)內(nèi)存

應用使用內(nèi)存=Total-(Free+Cached+Buffers)
系統(tǒng)使用內(nèi)存Used=Total-Free
cache?buffer區(qū)別
cache：
功能：緩存主要用于打開的文件
讀取策略：最少使用原則（LRU）
buffer:
功能：分緩存主要用于目錄項、inode等文件系
讀取策略：先進先出策略

#!/bin/bash
clear
if?[[?$#?-eq?0?]];then
#?define?variable?reset_terminal
reset_terminal=$(tput?sgr0)

#?check?os?type
os=$(uname?-o)
echo?-e?'\e[32m'"os?type:"?$reset_terminal?$os
#?check?os?release?version?and?name
os_name=$(cat?/etc/issue?|?grep?-e?"Server")
echo?-e?'\e[32m'"os?release?version"?$reset_terminal?$os_name
#?check?architecture
architecture=$(uname?-m)
echo?-e?'\e[32m'"architecture:"?$reset_terminal??$architecture
#?check?kernel?release
kernel_release=$(uname?-r)
echo?-e?'\e[32m'"kernel?release:"?$reset_terminal?$kernel_release?
#?check?hostname
hostname=$HOSTNAME
echo?-e?'\e[32m'"hostname:"?$reset_terminal?$hostname
#?check?inter?ip
inter_ip=$(hostname?-I)
echo?-e?'\e[32m'"inter?ip:"?$reset_terminal?$inter_ip
#?check?dns
dns_addr=$(cat?/etc/resolv.conf?|?grep?-E?"\<nameserver[?]+"?|?awk?'{print?$NF}')
echo?-e?'\e[32m'"dns:"?$reset_terminal?$dns_addr
fi

#!/bin/bash
clear
if?[[?$#?-eq?0?]];then
#?define?variable?reset_terminal
reset_terminal=$(tput?sgr0)?
#?check?os?type
os=$(uname?-o)
#?check?os?release?version?and?name
os_name=$(cat?/etc/issue?|?grep?-e?"Server")
#?check?architecture
architecture=$(uname?-m)
#?check?kernel?release
kernel_release=$(uname?-r)
#?check?hostname
hostname=$HOSTNAME
#?check?inter?ip
inter_ip=$(hostname?-I)
#?check?dns
dns_addr=$(cat?/etc/resolv.conf?|?grep?-E?"\<nameserver[?]+"?|?awk?'{print?$NF}')
fi

#!/bin/bash
clear
if?[[?$#?-eq?0?]];
then
#?define?variable?reset_terminal
reset_terminal=$(tput?sgr0)

#?check?os?type
os=$(uname?-o)
#?check?os?release?version?and?name
os_name=$(cat?/etc/issue?|?grep?-e?"Server")
#?check?architecture
architecture=$(uname?-m)
#?check?kernel?release
kernel_release=$(uname?-r)
#?check?hostname
hostname=$HOSTNAME

系統(tǒng)磁盤信息

CPU負載概念

系統(tǒng)信息——分析系統(tǒng)的運行狀態(tài)

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