dmidecode|grep "System Information" -A9|egrep  "Manufacturer|Product|Serial" 

dmidecode |grep -A16 "System Information$" 

 dmidecode -t bios

dmidecode -t memory | more

lspci # 可列出每个pci总线上的设备, 通过grep过滤后可得到网卡设备列表

free -mh                 								# 概要查看内存情况
dmidecode -t memory      								# 查看内存硬件信息
dmidecode|grep -P 'Maximum\s+Capacity' 	# 最大支持多少内存

dmidecode|grep -A5 "Memory Device"|grep Size | grep -v Range # Linux 查看内存已经使用插槽数

dmidecode|grep -A16 "Memory Device"|grep 'Speed' # 内存频率

cat /proc/meminfo |head -20 # 内存详细信息

free -mh # 内存使用情况

ifconfig
ethtool bond0
ethtool bond1

ifconfig -a
ip link show

lsblk  # fdisk一般用来磁盘分区，也可以用来查看磁盘分区情况
fdisk -l # 硬盘和分区的详细信息

# lsblk命令用于列出所有可用块设备的信息，而且还能显示他们之间的依赖关系
lsblk

# 其他命令

mount | column -t
swapon -s Filename Type Size Used Priority
df -hT
du --max-depth=1 -ah 2> /dev/null | sort -hr | head
smartctl -a /dev/sda

uname -a
cat /etc/redhat-release
dmidecode -s system-serial-number # 系统序列号

#!/usr/bin/env bash

if  [ ! -e '/usr/bin/wget' ]; then
    echo "Error: wget command not found. You must be install wget command at first."
    exit 1
fi

# Colors
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[0;33m'
BLUE='\033[0;36m'
PLAIN='\033[0m'

get_opsy() {
    [ -f /etc/redhat-release ] && awk '{print ($1,$3~/^[0-9]/?$3:$4)}' /etc/redhat-release && return
    [ -f /etc/os-release ] && awk -F'[= "]' '/PRETTY_NAME/{print $3,$4,$5}' /etc/os-release && return
    [ -f /etc/lsb-release ] && awk -F'[="]+' '/DESCRIPTION/{print $2}' /etc/lsb-release && return
}

next() {
    printf "%-70s\n" "-" | sed 's/\s/-/g'
}

calc_disk() {
    local total_size=0
    local array=$@
    for size in ${array[@]}
    do
        [ "${size}" == "0" ] && size_t=0 || size_t=`echo ${size:0:${#size}-1}`
        [ "`echo ${size:(-1)}`" == "K" ] && size=0
        [ "`echo ${size:(-1)}`" == "M" ] && size=$( awk 'BEGIN{printf "%.1f", '$size_t' / 1024}' )
        [ "`echo ${size:(-1)}`" == "T" ] && size=$( awk 'BEGIN{printf "%.1f", '$size_t' * 1024}' )
        [ "`echo ${size:(-1)}`" == "G" ] && size=${size_t}
        total_size=$( awk 'BEGIN{printf "%.1f", '$total_size' + '$size'}' )
    done
    echo ${total_size}
}

cname=$( awk -F: '/model name/ {name=$2} END {print name}' /proc/cpuinfo | sed 's/^[ \t]*//;s/[ \t]*$//' )
cores=$( awk -F: '/model name/ {core++} END {print core}' /proc/cpuinfo )
freq=$( awk -F'[ :]' '/cpu MHz/ {print $4;exit}' /proc/cpuinfo )
tram=$( free -m | awk '/Mem/ {print $2}' )
uram=$( free -m | awk '/Mem/ {print $3}' )
swap=$( free -m | awk '/Swap/ {print $2}' )
uswap=$( free -m | awk '/Swap/ {print $3}' )
up=$( awk '{a=$1/86400;b=($1%86400)/3600;c=($1%3600)/60} {printf("%d days, %d hour %d min\n",a,b,c)}' /proc/uptime )
load=$( w | head -1 | awk -F'load average:' '{print $2}' | sed 's/^[ \t]*//;s/[ \t]*$//' )
opsy=$( get_opsy )
arch=$( uname -m )
lbit=$( getconf LONG_BIT )
kern=$( uname -r )
#ipv6=$( wget -qO- -t1 -T2 ipv6.icanhazip.com )
disk_size1=($( LANG=C df -hPl | grep -wvE '\-|none|tmpfs|devtmpfs|by-uuid|chroot|Filesystem|udev|docker' | awk '{print $2}' ))
disk_size2=($( LANG=C df -hPl | grep -wvE '\-|none|tmpfs|devtmpfs|by-uuid|chroot|Filesystem|udev|docker' | awk '{print $3}' ))
disk_total_size=$( calc_disk "${disk_size1[@]}" )
disk_used_size=$( calc_disk "${disk_size2[@]}" )

clear
next
echo -e "CPU                  : ${BLUE}$cname${PLAIN}"
echo -e "核心数               : ${BLUE}$cores${PLAIN}"
echo -e "CPU 主频             : ${BLUE}$freq MHz${PLAIN}"
echo -e "硬盘                 : ${BLUE}$disk_total_size GB ($disk_used_size GB Used)${PLAIN}"
echo -e "内存                 : ${BLUE}$tram MB ($uram MB Used)${PLAIN}"
echo -e "交换分区             : ${BLUE}$swap MB ($uswap MB Used)${PLAIN}"
echo -e "OS                   : ${BLUE}$opsy${PLAIN}"
echo -e "Arch                 : ${BLUE}$arch ($lbit Bit)${PLAIN}"
echo -e "内核                 : ${BLUE}$kern${PLAIN}"
echo -e "运行时间             : ${BLUE}$up${PLAIN}"
echo -e "平均负载             : ${BLUE}$load${PLAIN}"
next

dmidecode可以让你在Linux系统下获取有关硬件方面的信息。

dmidecode的作用是将DMI数据库中的信息解码，以可读的文本方式显示。由于DMI信息可以人为修改，因此里面的信息不一定是系统准确的信息。

dmidecode遵循SMBIOS/DMI标准，其输出的信息包括BIOS、系统、主板、处理器、内存、缓存等等。

DMI（Desktop Management Interface,DMI）就是帮助收集电脑系统信息的管理系统，DMI信息的收集必须在严格遵照SMBIOS规范的前提下进行。SMBIOS（System Management BIOS）是主板或系统制造者以标准格式显示产品管理信息所需遵循的统一规范。SMBIOS和DMI是由行业指导机构Desktop Management Task Force(DMTF)起草的开放性的技术标准，其中DMI设计适用于任何的平台和操作系统。

DMI充当了管理工具和系统层之间接口的角色。它建立了标准的可管理系统更加方便了电脑厂商和用户对系统的了解。DMI的主要组成部分是Management Information Format(MIF)数据库。这个数据库包括了所有有关电脑系统和配件的信息。通过DMI，用户可以获取序列号、电脑厂商、串口信息以及其它系统配件信息。

sudo apt-get install libmnl-dev linux-headers-$(uname -r) build-essential make git # 安装必要的包

# 如果无法安装headlers，那么应该是内核偏老，先升级到比较新的内核

echo "deb http://deb.debian.org/debian/ unstable main" | sudo tee /etc/apt/sources.list.d/unstable.list
echo -e "Package: *\nPin: release a=unstable\nPin-Priority: 150\n" | tee /etc/apt/preferences.d/limit-unstable

apt-get update
apt-get upgrade
apt-get install wireguard-dkms wireguard-tools

sudo mkdir -p /etc/wireguard
cd /etc/wireguard
sudo umask 077

# 快速生成密钥
sudo wg genkey | tee privatekey | wg pubkey > publickey

[Interface]
PrivateKey = #服务端的密钥
Address = 10.0.0.1/24, fd86:ea04:1115::1/64 #服务端的地址
ListenPort = 28472 #服务端的端口
PostUp = iptables -A FORWARD -i wg0 -j ACCEPT; iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE; ip6tables -A FORWARD -i wg0 -j ACCEPT; ip6tables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
PostDown = iptables -D FORWARD -i wg0 -j ACCEPT; iptables -t nat -D POSTROUTING -o eth0 -j MASQUERADE; ip6tables -D FORWARD -i wg0 -j ACCEPT; ip6tables -t nat -D POSTROUTING -o eth0 -j MASQUERADE
SaveConfig = true

sudo wg-quick up wg0

systemctl enable wg-quick@wg0

wg

[Interface]
PrivateKey = #客户端的密钥
Address = 100.100.100.2/32 #客户端的内网地址
MTU = 1420
[Peer]
PublicKey = #服务端的公钥
Endpoint = 12.32.42.52:28472 #服务端的IP和端口
AllowedIPs = 100.100.100.0/24, 10.64.0.0/10, 10.128.0.0/10 #允许走wireguard的目的IP
PersistentKeepalive = 25

qrencode -t ansiutf8 < wg0.conf

[#] ip link add wg0 type wireguard
RTNETLINK answers: Operation not supported
Unable to access interface: Protocol not supported
[#] ip link delete dev wg0
Cannot find device "wg0"

apt-get dist-upgrade
update-grub
/sbin/reboot