系统登录前的检测

登陆前的检查

每次登录linux都想看一下系统的一些信息以及cpu和内存，但是不想手敲。整理了一份登录检查清单脚本，涵盖了系统的基础信息、内存、cpu、网络、docker等等的信息。

只需要在/etc/profile.d/创建这个脚本，粘贴下面的脚本内容；

vim /etc/profile.d/autosearchinfo.sh

然后赋予脚本的执行权限即可。每次登录就可以自动检查信息了。

chmod +x /etc/profile.d/autosearchinfo.sh

ps：内存使用率是使用bc命令计算的，bc命令先装。

1.Centos

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#!/bin/bash

clear

LogFileName=polling.$(date +%F-%T)
EchoFormat=$(for (( i=0;i<30;i++ ));do echo -n "=";done)

# 定义颜色
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[0;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

# 系统信息
SystemInfo(){
    printf "${BLUE}${EchoFormat} 系统信息 ${EchoFormat}${NC}\n"
    printf "系统类型: %-10s\n" $(uname -a| awk '{print $NF}')
    printf "系统版本: %-10s\n" "$(cat /etc/redhat-release)"
    printf "内核信息: %-10s\n" $(uname -r)
    printf "主机名: %-10s\n" $(uname -n)
    printf "编码格式: %-10s\n" ${LANG}
    printf "系统当前时间: %-10s %-10s\n" $(date +%F) $(date +%T)
    printf "系统运行负载: %-4s %-1s\n" $(uptime | awk -F: '{print $5 }'|awk -F, '{print $1,"%"}')
    printf "系统运行天数: %-10s\n" $(uptime |awk '{print $3}')
    printf "在线用户人数: %-3s\n" $(w|tail -n +3|wc -l)
    printf "SELinux: %-10s\n" $(grep "SELINUX=[d|e|p]" /etc/selinux/config |awk -F= '{print $2}')
    echo -e "最后一次修改时间: $(uptime -p)"
    echo -e "IP地址: $(hostname -I | cut -d' ' -f1)"
    echo -e "Cpu处理器: $(lscpu | grep "Model name:" | sed 's/Model name:\s*//')"
    echo -e "内存空间: $(free -h | awk '/^Mem:/ { print $3 "/" $2 }')"
    echo -e "交换空间: $(free -h | awk '/^Swap:/ { print $3 "/" $2 }')"
}

# CPU信息
CpuInfo(){
    MemonyId=$(top -b -n1|awk 'NR==3'|awk -F, '{print $4}'| cut -c 1-5)
    MemonyUse=$(echo "100-${MemonyId}" |bc)
    printf "${RED}${EchoFormat} CPU信息 ${EchoFormat}${NC}\n"
    printf "逻辑CPU核数: %-3s\n" $(grep "processor" /proc/cpuinfo|sort -u|wc -l)
    printf "物理CPU核数: %-3s\n" $(grep "physical id" /proc/cpuinfo |sort -u|wc -l)
    printf "CPU架构: %-3s\n" $(uname -m)
    printf "CPU设置型号: %-3s\n" "$(grep "model name" /proc/cpuinfo |awk -F: '{print $2}'|sort -u|cut -c 2-50)"
    echo -e "CPU 1分钟负载: `awk  '{printf "%15s",$1}' /proc/loadavg`"
    echo -e "CPU 5分钟负载: `awk  '{printf "%15s",$2}' /proc/loadavg`"
    echo -e "CPU10分钟负载: `awk  '{printf "%15s",$3}' /proc/loadavg`"
    printf "使用CPU占比: %-1s %-1s\n" ${MemonyUse} %
    printf "空闲CPU占比: %-1s %-1s\n" ${MemonyId} %
    printf "占用CPU Top10信息:\n\n"
    ps -eo user,pid,pcpu,pmem,args --sort=-pcpu  |head -n 10
}

# Memory信息
MemoryInfo(){
    printf "${GREEN}${EchoFormat} 内存信息 ${EchoFormat}${NC}\n"
    printf "总共内存: %-1s\n" $(free -mh|awk "NR==2"|awk '{print $2}')
    printf "使用内存: %-1s\n" $(free -mh|awk "NR==2"|awk '{print $3}')
    printf "剩余内存: %-1s\n" $(free -mh|awk "NR==2"|awk '{print $4}')
    printf "内存使用占比: %-1s %-1s\n" $(free | grep -i mem |awk '{print $6/$2*100}'|cut -c1-5) %
    printf "占用内存排名前10的soft:\n\n"
    ps -eo user,pid,pcpu,pmem,args --sort=-pmem  |head -n 10
}

# 磁盘使用量排序：
Disk_Info() {
    printf "${YELLOW}${EchoFormat} 各分区使用率 ${EchoFormat}${NC}\n"
    df -h
    echo
}

# Swap信息
SwapInfo(){
    printf "${BLUE}${EchoFormat} Swap信息 ${EchoFormat}${NC}\n"
    printf "Swap总大小: %-1s\n" $(free -mh|awk "NR==3"|awk '{print $2}')
    printf "已用Swap: %-1s\n" $(free -mh|awk "NR==3"|awk '{print $3}')
    printf "可用Swap: %-1s\n" $(free -mh|awk "NR==3"|awk '{print $4}')
}

# 网络信息
NetworkInfo(){
    printf "${RED}${EchoFormat} 网络信息 ${EchoFormat}${NC}\n"
    printf "IP地址: %-1s %-1s %-1s %-1s\n" $(ifconfig -a|grep inet|grep -v 127.0.0.1|grep -v inet6|awk '{print $2}'|tr -d "addr:")
    printf "网关: %-1s %-1s %-1s %-1s\n" $(ifconfig -a|grep "netmask"|grep -v 127.0.0.1|awk '{print $4}') 
    printf "DNS: %-1s %-1s %-1s %-1s %-1s\n" $(grep "nameserver" /etc/resolv.conf | awk '{print $2}')
    if (ping -c2 -w2 www.baidu.com &>/dev/null);then
        printf "网络是否连通: %s\n" 是
    else
        printf "网络是否连通: %s\n" 否
    fi
}

# docker检查
DockerInfo(){
    printf "${GREEN}${EchoFormat} docker运行情况 ${EchoFormat}${NC}\n"
    printf "当前正在运行的容器：\n $(docker ps --format "{{.Names}}")\n"
    printf "当前没有运行的容器：\n $(docker ps --format "{{.Names}}"|grep Exited)\n"
}

# 直接登录后打印
SystemInfo 
CpuInfo
MemoryInfo
Disk_Info
SwapInfo
NetworkInfo
DockerInfo

# 登录后进入查看模式
# All(){
# SystemInfo 
# CpuInfo
# MemoryInfo
# Disk_Info
# SwapInfo
# NetworkInfo
# }
# All >${LogFileName};less ${LogFileName}

2.Debian

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#!/bin/bash

clear

LogFileName=polling.$(date +%F-%T)
EchoFormat=$(for (( i=0;i<30;i++ ));do echo -n "=";done)

# 定义颜色
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[0;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

# 系统信息
SystemInfo(){
    printf "${BLUE}${EchoFormat} 系统信息 ${EchoFormat}${NC}\n"
    printf "系统类型: %-10s\n" $(uname -o)
    printf "系统版本: %-10s\n" "$(cat /etc/os-release | grep 'PRETTY_NAME' | cut -d '"' -f 2)"
    printf "内核信息: %-10s\n" $(uname -r)
    printf "主机名: %-10s\n" $(hostname)
    printf "编码格式: %-10s\n" ${LANG}
    printf "系统当前时间: %-10s %-10s\n" $(date +%F) $(date +%T)
    printf "系统运行负载: %-4s %-1s\n" $(uptime | awk -F: '{print $NF}' | awk -F, '{print $1,"%"}')
    printf "系统运行天数: %-10s\n" $(uptime | awk -F, '{print $1}' | awk '{print $3}')
    printf "在线用户人数: %-3s\n" $(who | wc -l)
    printf "SELinux: %-10s\n" $(getenforce 2>/dev/null || echo "Disabled")
    echo -e "最后一次修改时间: $(uptime -s)"
    echo -e "IP地址: $(hostname -I | cut -d' ' -f1)"
    echo -e "Cpu处理器: $(lscpu | grep "Model name:" | sed 's/Model name:\s*//')"
    echo -e "内存空间: $(free -h | awk '/^Mem:/ { print $3 "/" $2 }')"
    echo -e "交换空间: $(free -h | awk '/^Swap:/ { print $3 "/" $2 }')"
}

# CPU信息
CpuInfo(){
    MemonyId=$(top -b -n1 | awk 'NR==3' | awk -F, '{print $4}' | cut -c 1-5)
    MemonyUse=$(echo "100-${MemonyId}" | bc)
    printf "${RED}${EchoFormat} CPU信息 ${EchoFormat}${NC}\n"
    printf "逻辑CPU核数: %-3s\n" $(nproc)
    printf "物理CPU核数: %-3s\n" $(lscpu | grep "Socket(s):" | awk '{print $2}')
    printf "CPU架构: %-3s\n" $(uname -m)
    printf "CPU设置型号: %-3s\n" "$(lscpu | grep "Model name:" | sed 's/Model name:\s*//')"
    echo -e "CPU 1分钟负载: `awk  '{printf "%15s",$1}' /proc/loadavg`"
    echo -e "CPU 5分钟负载: `awk  '{printf "%15s",$2}' /proc/loadavg`"
    echo -e "CPU10分钟负载: `awk  '{printf "%15s",$3}' /proc/loadavg`"
    printf "使用CPU占比: %-1s %-1s\n" ${MemonyUse} %
    printf "空闲CPU占比: %-1s %-1s\n" ${MemonyId} %
    printf "占用CPU Top10信息:\n\n"
    ps -eo user,pid,pcpu,pmem,args --sort=-pcpu | head -n 10
}

# Memory信息
MemoryInfo(){
    printf "${GREEN}${EchoFormat} 内存信息 ${EchoFormat}${NC}\n"
    printf "总共内存: %-1s\n" $(free -h | awk '/^Mem:/ {print $2}')
    printf "使用内存: %-1s\n" $(free -h | awk '/^Mem:/ {print $3}')
    printf "剩余内存: %-1s\n" $(free -h | awk '/^Mem:/ {print $4}')
    printf "内存使用占比: %-1s %-1s\n" $(free | awk '/^Mem:/ {printf "%.2f", $3/$2*100}') %
    printf "占用内存排名前10的soft:\n\n"
    ps -eo user,pid,pcpu,pmem,args --sort=-pmem | head -n 10
}

# 磁盘使用量排序：
Disk_Info() {
    printf "${YELLOW}${EchoFormat} 各分区使用率 ${EchoFormat}${NC}\n"
    df -h
    echo
}

# Swap信息
SwapInfo(){
    printf "${BLUE}${EchoFormat} Swap信息 ${EchoFormat}${NC}\n"
    printf "Swap总大小: %-1s\n" $(free -h | awk '/^Swap:/ {print $2}')
    printf "已用Swap: %-1s\n" $(free -h | awk '/^Swap:/ {print $3}')
    printf "可用Swap: %-1s\n" $(free -h | awk '/^Swap:/ {print $4}')
}

# 网络信息
NetworkInfo(){
    printf "${RED}${EchoFormat} 网络信息 ${EchoFormat}${NC}\n"
    printf "IP地址: %-1s %-1s %-1s %-1s\n" $(ip addr show | grep 'inet ' | grep -v '127.0.0.1' | awk '{print $2}' | cut -d/ -f1)
    printf "网关: %-1s %-1s %-1s %-1s\n" $(ip route | grep default | awk '{print $3}')
    printf "DNS: %-1s %-1s %-1s %-1s %-1s\n" $(grep "nameserver" /etc/resolv.conf | awk '{print $2}')
    if (ping -c2 -w2 www.baidu.com &>/dev/null);then
        printf "网络是否连通: %s\n" 是
    else
        printf "网络是否连通: %s\n" 否
    fi
}

# docker检查
DockerInfo(){
    printf "${GREEN}${EchoFormat} docker运行情况 ${EchoFormat}${NC}\n"
    if command -v docker &>/dev/null; then
        printf "当前正在运行的容器：\n $(docker ps --format "{{.Names}}")\n"
        printf "当前没有运行的容器：\n $(docker ps -a --filter "status=exited" --format "{{.Names}}")\n"
    else
        printf "Docker 未安装或未启动\n"
    fi
}

# 直接登录后打印
SystemInfo 
CpuInfo
MemoryInfo
Disk_Info
SwapInfo
NetworkInfo
DockerInfo

# 登录后进入查看模式
# All(){
# SystemInfo 
# CpuInfo
# MemoryInfo
# Disk_Info
# SwapInfo
# NetworkInfo
# }
# All >${LogFileName};less ${LogFileName}