Linux连接提示文字

一、编辑motd文件

命令：vi /etc/motd

内容示例：


/**
**************************************************************
 *                                                            *
 *   .=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-.       *
 *    |                     ______                     |      *
 *    |                  .-"      "-.                  |      *
 *    |                 /            \                 |      *
 *    |     _          |              |          _     |      *
 *    |    ( \         |,  .-.  .-.  ,|         / )    |      *
 *    |     > "=._     | )(__/  \__)( |     _.=" <     |      *
 *    |    (_/"=._"=._ |/     /\     \| _.="_.="\_)    |      *
 *    |           "=._"(_     ^^     _)"_.="           |      *
 *    |               "=\__|IIIIII|__/="               |      *
 *    |              _.="| \IIIIII/ |"=._              |      *
 *    |    _     _.="_.="\          /"=._"=._     _    |      *
 *    |   ( \_.="_.="     `--------`     "=._"=._/ )   |      *
 *    |    > _.="                            "=._ <    |      *
 *    |   (_/                                    \_)   |      *
 *    |                                                |      *
 *    '-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-='      *
 *                                                            *
 *           LASCIATE OGNI SPERANZA, VOI CH'ENTRATE           *
**************************************************************
 */
 **************************************************************
 *  注意：该服务器用于部署Docker容器，使用Portainer面板管理   *
 *               管理地址：192.168.11.244:9000                *
 **************************************************************

二、添加系统详细信息

1.创建脚本

在/usr/src/scripts目录下新建一个systeminfo.sh文件，并增加可执行（755）权限

内容如下


#!/bin/bash
 
date=`date "+%F %T"`
head="System information as of: $date"
 
kernel=`uname -r`
hostname=`echo $HOSTNAME`
 
#Cpu load
load1=`cat /proc/loadavg | awk '{print $1}'`
load5=`cat /proc/loadavg | awk '{print $2}'`
load15=`cat /proc/loadavg | awk '{print $3}'`
 
#System uptime
uptime=`cat /proc/uptime | cut -f1 -d.`
upDays=$((uptime/60/60/24))
upHours=$((uptime/60/60%24))
upMins=$((uptime/60%60))
upSecs=$((uptime%60))
up_lastime=`date -d "$(awk -F. '{print $1}' /proc/uptime) second ago" +"%Y-%m-%d %H:%M:%S"`
 
#Memory Usage
mem_usage=`free -m | awk '/Mem:/{total=$2} /buffers\/cache/ {used=$3} END {printf("%3.2f%%",used/total*100)}'`
swap_usage=`free -m | awk '/Swap/{printf "%.2f%",$3/$2*100}'`
 
#Processes
processes=`ps aux | wc -l`
 
#User
users=`users | wc -w`
USER=`whoami`
 
#System fs usage
Filesystem=$(df -h | awk '/^\/dev/{print $6}')
 
#Interfaces
INTERFACES=$(ip -4 ad | grep 'state ' | awk -F":" '!/^[0-9]*: ?lo/ {print $2}')
 
echo
echo "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"
echo "$head"
echo "----------------------------------------------"
printf "Kernel Version:\t%s\n" $kernel
printf "HostName:\t%s\n" $hostname
printf "System Load:\t%s %s %s\n" $load1, $load5, $load15
printf "System Uptime:\t%s "days" %s "hours" %s "min" %s "sec"\n" $upDays $upHours $upMins $upSecs
printf "Memory Usage:\t%s\t\t\tSwap Usage:\t%s\n" $mem_usage $swap_usage
printf "Login Users:\t%s\t\t\tWhoami:\t\t%s\n" $users $USER
printf "Processes:\t%s\n" $processes
printf "\n"
printf "Filesystem\tUsage\n"
for f in $Filesystem
do
    Usage=$(df -h | awk '{if($NF=="'''$f'''") print $5}')
    echo -e "$f\t\t$Usage"
done
printf "\n"
printf "Interface\tMAC Address\t\tIP Address\n"
for i in $INTERFACES
do
    MAC=$(ip ad show dev $i | grep "link/ether" | awk '{print $2}')
    IP=$(ip ad show dev $i | awk '/inet / {print $2}')
    printf $i"\t\t"$MAC"\t$IP\n"
done
echo "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"
echo

3.编辑/etc/profile文件

在文档尾部新增：/usr/src/scripts/systeminfo.sh

效果如下：


Last login: Fri Jun 10 14:15:00 2022 from 192.168.11.240
/**
 **************************************************************
 *                                                            *
 *   .=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-.       *
 *    |                     ______                     |      *
 *    |                  .-"      "-.                  |      *
 *    |                 /            \                 |      *
 *    |     _          |              |          _     |      *
 *    |    ( \         |,  .-.  .-.  ,|         / )    |      *
 *    |     > "=._     | )(__/  \__)( |     _.=" <     |      *
 *    |    (_/"=._"=._ |/     /\     \| _.="_.="\_)    |      *
 *    |           "=._"(_     ^^     _)"_.="           |      *
 *    |               "=\__|IIIIII|__/="               |      *
 *    |              _.="| \IIIIII/ |"=._              |      *
 *    |    _     _.="_.="\          /"=._"=._     _    |      *
 *    |   ( \_.="_.="     `--------`     "=._"=._/ )   |      *
 *    |    > _.="                            "=._ <    |      *
 *    |   (_/                                    \_)   |      *
 *    |                                                |      *
 *    '-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-='      *
 *                                                            *
 *           LASCIATE OGNI SPERANZA, VOI CH'ENTRATE           *
 **************************************************************
 */
 **************************************************************
 *  注意：该服务器用于部署Docker容器，使用Portainer面板管理   *
 *               管理地址：192.168.11.244:9000                *
 ************************************************************** 

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
System information as of: 2022-06-10 14:20:54
----------------------------------------------
Kernel Version:	3.10.0-1160.62.1.el7.x86_64
HostName:	localhost.localdomain
System Load:	0.15, 0.17, 0.11
System Uptime:	8 days 19 hours 55 min 7 sec
Memory Usage:	0.00%			Swap Usage:	0.00%
Login Users:	1			Whoami:		root
Processes:	237

Filesystem	Usage
/		44%
/boot		20%
/home		1%

Interface	MAC Address		IP Address
ens192		00:50:56:a0:0c:1c	192.168.11.244/24
br-a6f6ec52d4ad		02:42:73:36:a9:ca	172.18.0.1/16
docker0		02:42:ce:ae:ce:7c	172.17.0.1/16
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++