Linux-disk-quota-management-project

[TOC]

ssh tools：Termius

Virtual Machine：vmware 14 Markdown：印象笔记 & Typora

Linux Set up the network card when boot

Enter the terminal

cd /etc/sysconfig/network-scripts

Vi opens the corresponding network card configuration file. Centos defaults to ens33 and most other systems to enth0

vi ifcfg-ens33

Change ONBOOT=no to ONBOOT=yes Wq save
Restart the system, you will find that the network card has been booted with boot

Configure system disk 60GB+ storage disk 10GB

Perform fdisk -l view new add hard disk, you can see the SDB for the newly added the hard disk.
fdisk /dev/sdbFormat new hard disk
Enter m to see help
Enter n to create a new partition, p to create a new primary partition, and 1 (primary partition number) to start and end the disk partition respectively.
Enter w to save the partition
```Fdisk -l ` view partitions, with sdb1;
Input MKFS. Corruption partitions formatted into corruption format
Edit /etc/fstab and add at the bottom:

/ dev/sdb1 / app corruption defaults 0 0

Make the disk boot mount to the /app directory

Modify the kernel fstab to open the disk quota limit on the root directory

vim /etc/fstab

The marked places are the places that need to be added. This means that the disk quota limit is applied to the root directory. Of course, it can also be added to other lines, which means that the disk quota limit is applied to other directories.

View the directory mount location

df -h

The root partition is remounted and the kernel reads the /etc/fstab file again

mount -o remount /app
mount | grep quota

install quota

yum install quota

Generate the quota configuration file in the root directory through the quotacheck command

quotacheck -cugm /dev/sdb1
ll / | grep quota

Boot disk quota

quotaon /dev/sdb1

Create a user in /app/data

mkdir thenewuser #记得更改文件权限
cp .bash_logout  .bash_profil  .bashrc /app/data/thenewuser
useradd -m -d /app/data/thenewuser thenewuser

Open to user

edquota -u thenewuser

Simulate large file writes

dd if=/dev/zero of=/app/data/file1 bs=1M count=450  #未超上限，无报错
dd if=/dev/zero of=/app/data/file2 bs=1M count=450  #报错

View disk usage

repquota /dev/sdb1

The script text

!/bin/bash
#userlist=cat /etc/passwd | awk 'BEGIN {FS=":"}{print $1}'
TEXT1=`cat "/etc/passwd"`
DATE=`date "+%Y-%m-%d_%H-%M"`
echo $DATE
USERNUMBER=`wc -l /etc/passwd|cut -d' ' -f1`
echo $USERNUMBER
USERALLLIST=`echo "$TEXT1" | awk 'BEGIN {FS=":"}{print $1}'`

echo $USERALLLIST
echo "********************************************************************************************************"
for((i=1;i<=$USERNUMBER;i++));do
    echo "这是第 $i 个用户";
    FORUSER=`cut -d: -f1 /etc/passwd | head -$i | tail -1`
    echo $FORUSER
    #CHECKFULLUSER=`repquota /dev/sdb1 | grep $FORUSER | tr -s ' ' |cut -d ' ' -f1`
    CHECKFULLUSED=`repquota /dev/sdb1 | grep $FORUSER | tr -s ' ' |cut -d ' ' -f3`
    CHECKFULLUSED=${CHECKFULLUSED:=0} #若 num 为空或未设置时，则 num 设为值 0
    #echo $CHECKFULLUSER
    echo $CHECKFULLUSED
    if [ $CHECKFULLUSED -eq 500000 ]
    then
       echo "over used"
       mkdir overuseddata-$FORUSER
       mv ./overuseddata-$FORUSER /app/overuseddata
       mv /app/data/$FORUSER/* /app/overuseddata/overuseddata-$FORUSER  #移动所有滥用文件到overuseddata（不包括隐藏的配置文件）
       tar -czvf $FORUSER-$DATE.tar.gz /app/overuseddata/overuseddata-$FORUSER
       mv /app/$FORUSER-$DATE.tar.gz /app/overuseddata
       rm -Rf /app/overuseddata/overuseddata-$FORUSER
       echo "文件已移动"    
    elif [ $CHECKFULLUSED -gt 500000 ]
    then
       echo "over used"
       mkdir overuseddata-$FORUSER
       mv ./overuseddata-$FORUSER /app/overuseddata
       mv /app/data/$FORUSER/* /app/overuseddata/overuseddata-$FORUSER  #移动所有滥用文件到overuseddata（不包括隐藏的配置文件）
       tar -czvf $FORUSER-$DATE.tar.gz /app/overuseddata/overuseddata-$FORUSER
       mv /app/$FORUSER-$DATE.tar.gz /app/overuseddata
       
rm -Rf /app/overuseddata/overuseddata-$FORUSER
       echo "文件已移动" 
    else
       echo "used well"
    fi
done;

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