xfs_quota -x -c '指令' [挂载点]
-x: 专家模式, 加x会多一些可以显示的
-c: 加指令
指令:
	- print: 打印文件系统参数等数据
	- df: 与普通df一样
	- report: 'report -ugribh'等参数 r=project
	- state: 列出目前支持quota的文件系统的信息
	- limit: 'limit [-ug] b[soft|hard]=N i[soft|hard]=N name'  #b=block i=inode, N=数量, 也可为单位 name=用户/组的名称
	- timer: 'timer [-ug] [-bir] Ndays'  

root@ck_test:~# xfs_quota -x -c print
Filesystem          Pathname
/home/ck/quota_test_dir /dev/sdb (uquota, gquota)

root@ck_test:~# xfs_quota -xc 'report -ib'
User quota on /home/ck/quota_test_dir (/dev/sdb)
                               Blocks                                          Inodes                     
User ID          Used       Soft       Hard    Warn/Grace           Used       Soft       Hard    Warn/ Grace     
---------- -------------------------------------------------- -------------------------------------------------- 
root                0          0          0     00 [--------]          3          0          0     00 [--------]

Group quota on /home/ck/quota_test_dir (/dev/sdb)
                               Blocks                                          Inodes                     
Group ID         Used       Soft       Hard    Warn/Grace           Used       Soft       Hard    Warn/ Grace     
---------- -------------------------------------------------- -------------------------------------------------- 
root                0          0          0     00 [--------]          2          0          0     00 [--------]
myquotagrp          0          0          0     00 [--------]          1          0          0     00 [--------]



root@ck_test:~# xfs_quota  -xc "df -h"
Filesystem     Size   Used  Avail Use% Pathname
/dev/sdb      20.0G  52.7M  19.9G   0% /home/ck/quota_test_dir
/dev/sda2    195.9G   7.3G 188.6G   4% /

root@ck_test:~# xfs_quota -xc state
User quota state on /home/ck/quota_test_dir (/dev/sdb)	#用户
  Accounting: ON
  Enforcement: ON
  Inode: #99 (1 blocks, 1 extents)
Group quota state on /home/ck/quota_test_dir (/dev/sdb)	# 组
  Accounting: ON
  Enforcement: ON
  Inode: #100 (2 blocks, 2 extents)
Project quota state on /home/ck/quota_test_dir (/dev/sdb)	# project
  Accounting: OFF
  Enforcement: OFF
  Inode: N/A
Blocks grace time: [7 days]		# 以下是宽限时间
Inodes grace time: [7 days]
Realtime Blocks grace time: [7 days]
root@ck_test:~# 

#!/bin/bash
groupadd myquotagrp
for username in myquota1 myquota2 myquota3 myquota4 myquota5
do
  useradd -g myquotagrp $username
  echo "$username:password" | chpasswd
done
   mkdir /home/ck/quota_test_dir
   chgrp myquotagrp /home/ck/quota_test_dir
   chmod 2770 /home/ck/quota_test_dir

root@ck_test:~# df -Th /home/ck/quota_test_dir/
Filesystem     Type  Size  Used Avail Use% Mounted on
/dev/sdb       xfs    20G   53M   20G   1% /home/ck/quota_test_dir

quota在ext文件系统下, 仅支持整个文件系统的管理, 不支持目录单位的管理

root@ck_test:~# mount | grep quota_test_dir
/dev/sdb on /home/ck/quota_test_dir type xfs (rw,relatime,attr2,inode64,noquota)

此时发现该目录不支持quota(noquota), 因此需要对/etc/fstab进行修改

/dev/sdb        /home/ck/quota_test_dir xfs     defaults,usrquota,grpquota      0       0

root@ck_test:~# mount | grep quota_test_dir
/dev/sdb on /home/ck/quota_test_dir type xfs (rw,relatime,attr2,inode64,usrquota,grpquota)

                       Blocks                            Inodes              

2. 对组进行限制

   ```shell

   root@ck_test:~# xfs_quota -xc 'limit -g bsoft=950M bhard=1G myquotagrp' /home/ck/quota_test_dir/

   #效果

   root@ck_test:~# xfs_quota -xc 'report -gibh'

   Group quota on /home/ck/quota_test_dir (/dev/sdb)

                           Blocks                            Inodes              

   Group ID     Used   Soft   Hard Warn/Grace     Used   Soft   Hard Warn/Grace  

   ---------- --------------------------------- --------------------------------- 

   root            0      0      0  00 [------]      2      0      0  00 [------]

   myquotagrp      0   950M     1G  00 [------]      1      0      0  00 [------]

   ```

   ```shell

   root@ck_test:~# xfs_quota -xc 'timer -b -u 14days' /home/ck/quota_test_dir/

   root@ck_test:~# xfs_quota -xc 'timer -b -g 14days' /home/ck/quota_test_dir/

   root@ck_test:~# xfs_quota -xc state 

   User quota state on /home/ck/quota_test_dir (/dev/sdb)

     ......

   Blocks grace time: [14 days]

   Inodes grace time: [7 days]

   Realtime Blocks grace time: [7 days]

   ```

   ```shell

   su myquota1

   dd if=/dev/zero  of=quota1.img bs=1M count=260

   su myquota2

   dd if=/dev/zero  of=quota2.img bs=1M count=500

   CTRL + d # 退出

   root@ck_test:/home/ck/quota_test_dir# xfs_quota -xc 'report -bihu'

   User quota on /home/ck/quota_test_dir (/dev/sdb)

                           Blocks                            Inodes              

   User ID      Used   Soft   Hard Warn/Grace     Used   Soft   Hard Warn/Grace  

   ---------- --------------------------------- --------------------------------- 

   root            0      0      0  00 [0 days]      4      0      0  00 [------]

   myquota1     260M   250M   300M  00 [13 days]      1      0      0  00 [------]

   myquota2     300M   250M   300M  00 [13 days]      1      0      0  00 [------]

   myquota3        0   250M   300M  00 [------]      0      0      0  00 [------]

   myquota4        0   250M   300M  00 [------]      0      0      0  00 [------]

   myquota5        0   250M   300M  00 [------]      0      0      0  00 [------]

   root@ck_test:/home/ck/quota_test_dir# ll -h

   total 561M

   drwxrws--- 2 root     myquotagrp   42 Nov  5 21:50 ./

   drwxr-xr-x 4 ck       ck         4.0K Nov  5 20:53 ../

   -rw-r--r-- 1 myquota1 myquotagrp 260M Nov  5 21:47 quota1.img

   -rw-r--r-- 1 myquota2 myquotagrp 300M Nov  5 21:47 quota2.img

   ```

   可以看到, **quota1使用了260M, warn/grace是13天, 13天后, 其hard会变为260m**

   				**quota2即使dd了500M, 这里也只用了300M**

vim /etc/fstab
# 更改项目, prjquota与usr/grpquota不能同时设置
/dev/sdb        /home/ck/quota_test_dir xfs     defaults,prjquota       0       0
umount /home/ck/quota_test_dir/
mount -a
root@ck_test:~# mount | grep quota
/dev/sdb on /home/ck/quota_test_dir type xfs (rw,relatime,attr2,inode64,prjquota)

root@ck_test:~# echo '11:/home/ck/quota_test_dir' >> /etc/projects # 指定专案识别码与目录的对应11是识别码, 可以随便取, 一定要放到etx下的这个文件里
root@ck_test:~# echo 'myquotaproject:11' >> /etc/projid		# 规范专案名称与识别码的对应, 文件也是固定的
root@ck_test:~# xfs_quota -xc 'project -s myquotaproject' # 初始化专案名称
Setting up project myquotaproject (path /home/ck/quota_test_dir)...
Processed 1 (/etc/projects and cmdline) paths for project myquotaproject with recursion depth infinite (-1).
root@ck_test:~# xfs_quota -xc print
Filesystem          Pathname
/home/ck/quota_test_dir /dev/sdb (pquota)
/home/ck/quota_test_dir /dev/sdb (project 11, myquotaproject)

root@ck_test:~# xfs_quota -xc 'limit -p bsoft=450m bhard=500m myquotaproject' /home/ck/quota_test_dir/ #设置限制
root@ck_test:~# xfs_quota -xc 'report -bih'
Project quota on /home/ck/quota_test_dir (/dev/sdb)
                        Blocks                            Inodes              
Project ID   Used   Soft   Hard Warn/Grace     Used   Soft   Hard Warn/Grace  
---------- --------------------------------- --------------------------------- 
#0              0      0      0  00 [------]      2      0      0  00 [------]
myquotaproject      0   450M   500M  00 [------]      1      0      0  00 [------]