Linux主机巡检脚本

# 脚本源码

```shell
#!/bin/bash
time_day=`date  +%Y-%m-%d_%H:%M:%S`
time_cront=`date  +%Y%m%d%H%M%S`
time_cront_day=`date  +%Y%m%d`
time_file=`date +%Y-%m-%d`
system_hostname=$(hostname | awk '{print $1}')

#获取服务器IP
system_ip=$(hostname -I| awk '{print $1}')

#获取总内存
mem_total=$(free -m | grep Mem| awk -F " " '{print $2}')

#获取剩余内存
mem_free=$(free -m | grep "Mem" | awk '{print $4}')

#获取已用内存
mem_use=$(free -m | grep Mem| awk -F " " '{print $2-$4-$6}')

#系统进程数
load_1=`ps -ef |wc -l`

#僵尸进程数
load_5=`top -b -n 1 |grep Tasks |awk '{print $10}'`

#CPU空闲id
load_15=`top -b -n 1 |grep Cpu |awk -F',' '{print $4}' |awk -F'id' '{print $1}'|sed 's/ //g'|awk -F. '{print $1}'`
if [[ $((100-$load_15)) -gt 60 ]];then
	load_15_status=False
else
	load_15_status=OK
fi

#过滤磁盘使用率大于60%目录，并加入描述
#disk_1=$(df -Ph | awk '{if(+$5>15) print "分区:"$6,"总空间:"$2,"使用空间:"$3,"剩余空间:"$4,"磁盘使用率:"$5}')
disk_most=$(df -P | awk '{if(+$5>0) print $2,$6,$1}'|grep -Ev "sr0|docker"|sort -nr|awk '{print $2}'|head -1)
disk_f=$(df -Ph|grep "$disk_most"$ | awk '{if(+$5>0) print $6}')
disk_total=$(df -Ph|grep "$disk_most"$ | awk '{if(+$5>0) print $2}')
disk_free=$(df -Ph|grep "$disk_most"$ | awk '{if(+$5>0) print $4}')
disk_per=$(df -Ph|grep "$disk_most"$ | awk '{if(+$5>0) print $5}')

disk_ux=$(df -P | awk '{if(+$5>0) print $5,$1}'|grep -Ev "sr0|docker"|sort -nr|awk -F"%" '{print $1}'|head -1)
if [[ $disk_ux -gt 60 ]]
     then
        #分区
        disk_f_60=$(df -P | awk '{if(+$5>0) print $5,$1,$6}'|grep -Ev "sr0|docker"|sort -nr|awk  '{print $3}'|head -1)
        #磁盘使用率
        disk_per_60=$(df -P | awk '{if(+$5>0) print $5,$1,$6}'|grep -Ev "sr0|docker"|sort -nr|awk  '{print $1}'|head -1)
        disk_status=False
     else
        #分区
        disk_f_60=NULL
        #磁盘使用率
        disk_per_60=NULL
        disk_status=OK
     fi
#文件路径
CHECK_HOME="$(cd "`dirname "$0"`"; pwd)"
path="$CHECK_HOME"/monitor_system_check_"$time_file".txt

#内存阈值
mem_mo='70'
 PERCENT=$(printf "%d%%" $(($mem_use*100/$mem_total)))
 PERCENT_1=$(echo $PERCENT|sed 's/%//g')
 if [[ $PERCENT_1 -gt $mem_mo ]]
     then
      mem_status_total="$mem_total"MB
      mem_status_use="$mem_use"MB
      mem_status_per=$PERCENT
      mem_status=False
    else
      mem_status_total="$mem_total"MB
      mem_status_use=$"$mem_use"MB
      mem_status_per=$PERCENT
      mem_status=OK
 fi

# 空密码用户
null_user=$(for i in `cat /etc/shadow|grep '!!'|awk -F: '{print $1}'`;do cat /etc/passwd|grep "$i"|grep bash;done|awk -F: '{print $1}'|tr '\n' ' ')
if [[ $null_user != '' ]]; then
	null_user_status=False
else
	null_user_status=OK
fi

# 登陆失败用户
fail_user=`cat /var/log/secure|grep  -Ei 'authentication failure'|wc -l`
if [[ $fail_user > 0 ]]; then
	fail_user_status=False
else
	fail_user_status=OK
fi

echo -e  "\n------ $time_day ------\n\n服务器IP\t: $system_ip\n系统进程数\t: $load_1\n僵尸进程数\t: $load_5\n空密码用户\t: $null_user\n异常登陆数\t: $fail_user\n总内存大小\t: $mem_status_total\n已用内存\t: $mem_status_use\n分区信息\t: $disk_f\n数据盘总空间\t: $disk_total\n数据盘剩余\t: $disk_free\n磁盘超60分区\t: $disk_f_60\nCPU空闲率\t: ${load_15}%\n内存使用率\t: $mem_status_per\n数据盘使用率\t: $disk_per\n磁盘超60使用率\t: $disk_per_60\n\n==> statistics <==\n处理器状态\t: $load_15_status\n内存状态\t: $mem_status\n磁盘状态\t: $disk_status\n用户状态\t: $null_user_status\n登陆状态\t: $fail_user_status"

#rm -f $(dirname $(readlink -f "$0"))/$0
```

运行指令：`bash <(curl -sL https://fsou.pro/media/attachment/2023/01/system_check.sh)`

附件地址：[【附件】system_check.sh](/media/attachment/2023/01/system_check.sh)