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CentOS 6如何修改磁盘配额限制

时间:2021-04-09    来源:来吧老妹    人气:

为了避免用户过度的使用磁盘空间,管理员会对磁盘空间进行配额限制,以免影响系统运行,但在有些时候,因为磁盘配额限制设置的不合理,导致磁盘空间不够用,这时就需要对磁盘配额进行修改,下面小编就给大家介绍下CentOS 6如何修改磁盘配额限制。

CentOS建五个用户,均需要进行磁盘配额限制,每个用户的配额为 10MB (hard) 以及 8MB (soft)

环境

[root@localhost ~]# uname -a

Linux localhost.localdomain 2.6.32-431.el6.x86_64 #1 SMP Fri Nov 22 03:15:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

[root@localhost ~]# nl /etc/issue

1 CentOS release 6.5 (Final)

2 Kernel on an m

1、建5用户vbirdN

[root@linuxidc ~]# vi au.sh

#!/bin/bash

groupadd vbirdgroup

for username in vbird1 vbird2 vbird3 vbird4 vbird5

do

useradd -G vbirdgroup $username

echo ;password; | passwd --stdin $username

done

[root@linuxidc ~]# sh au.sh

Changing password for user vbird1.

passwd: all authentication tokens updated successfully.

Changing password for user vbird2.

passwd: all authentication tokens updated successfully.

Changing password for user vbird3.

passwd: all authentication tokens updated successfully.

Changing password for user vbird4.

passwd: all authentication tokens updated successfully.

Changing password for user vbird5.

passwd: all authentication tokens updated successfully.

2、扫一眼家目录

[root@linuxidc ~]# ll /home/

total 28

drwx------。 4 vbird1 vbird1 4096 Dec 1 15:57 vbird1

drwx------。 4 vbird2 vbird2 4096 Dec 1 15:57 vbird2

drwx------。 4 vbird3 vbird3 4096 Dec 1 15:57 vbird3

drwx------。 4 vbird4 vbird4 4096 Dec 1 15:57 vbird4

drwx------。 4 vbird5 vbird5 4096 Dec 1 15:57 vbird5

drwx------。 4 zxw zxw 4096 Sep 18 18:03 zxw

瞅一下vb1的组和id

[root@linuxidc ~]# id vbird1

uid=503(vbird1) gid=504(vbird1) groups=504(vbird1),503(vbirdgroup)

3、给刚建的这几个准备一个用于这几个用户都能访问的目录/home/vbirdgroup

[root@linuxidc ~]# mkdir /home/vbirdgroup

[root@linuxidc ~]# chgrp vbirdgroup /home/vbirdgroup/

[root@linuxidc ~]# chmod 2770 /home/vbirdgroup/

[root@linuxidc ~]# ll -d /home/linuxidc/

drwx---rwx. 5 linuxidc linuxidc 4096 Sep 18 14:13 /home/linuxidc/

设置第四位,它位于三位权限序列的前面,第四位数字取值是4,2,1,代表意思如下:

4,执行时设置用户ID,用于授权给基于文件属主的进程,而不是给创建此进程的用户。

2,执行时设置用户组ID,用于授权给基于文件所在组的进程,而不是基于创建此进程的用户。

1,设置粘着位。

4、现在 磁盘配额概要

在/home下进行quota,需要如下:

文件系统的支持

quota 数据文件建置

quota 启动

建立用户 quota 信息

5、将 /home 独立一个分区,因为 quota 仅支持 filesystem 而不支持单一目录

/home上增加usrquota,grpquota

[root@localhost ~]# nl /etc/fstab

1 #

2 # /etc/fstab

3 # Created by anaconda on Tue Dec 2 18:52:50 2014

4 #

5 # Accessible filesystems, by reference, are maintained under lsquo;/dev/diskrsquo;

6 # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info

7 #

8 UUID=93cd7207-78c4-4a95-be1b-7451772c21ad / ext4 defaults 1 1

9 UUID=9a982f8d-d590-49f2-9cf1-e07a5b8238dd /boot ext4 defaults 1 2

10 UUID=c8939b59-9a73-45fa-bd5a-f016a5aa631e /home ext4 defaults,usrquota,grpquota 1 2

11 UUID=1f3d9eaf-e140-47ab-ae99-fcf1516d2070 swap swap defaults 0 0

12 tmpfs /dev/shm tmpfs defaults 0 0

13 devpts /dev/pts devpts gid=5,mode=620 0 0

14 sysfs /sys sysfs defaults 0 0

15 proc /proc proc defaults 0 0

6、卸载、加载/home,并查看/home项

[root@localhost ~]# umount /home/; mount -a

[root@localhost ~]# mount | grep home

/dev/sda3 on /home type ext4 (rw,usrquota,grpquota)

7、quotacheck生成配额文件,结果如下

[root@localhost ~]# qutoacheck -avug

-bash: qutoacheck: command not found

[root@localhost ~]#

 

8、查找、安装 quota

[root@localhost ~]# find / -name qutoacheck

[root@localhost ~]#

[root@localhost ~]# rpm -qa | grep quota

quota-3.17-20.el6.x86_64

安装

[root@localhost ~]# yum -y install quota-3.17-20.el6.x86_64

Loaded plugins: fastestmirror, refresh-packagekit, security

Loading mirror speeds from cached hostfile

* base: centos.ustc.edu.cn

* extras: centos.ustc.edu.cn

* updates: centos.ustc.edu.cn

base | 3.7 kB 00:00

base/primary_db | 4.6 MB 00:29

extras | 3.4 kB 00:00

extras/primary_db | 29 kB 00:00

updates | 3.4 kB 00:00

updates/primary_db | 910 kB 00:05

Setting up Install Process

Nothing to do

[root@localhost ~]#

9、开启限制,生成用户和组限制文件

[root@localhost ~]# quotacheck -avug

quotacheck: Your kernel probably supports journaled quota but you are not using it. Consider switching to journaled quota to avoid running quotacheck after an unclean shutdown.

quotacheck: Scanning /dev/sda3 [/home] done

quotacheck: Cannot stat old user quota file /home/aquota.user: No such file or directory. Usage will not be substracted.

quotacheck: Cannot stat old group quota file /home/aquota.group: No such file or directory. Usage will not be substracted.

quotacheck: Cannot stat old user quota file /home/aquota.user: No such file or directory. Usage will not be substracted.

quotacheck: Cannot stat old group quota file /home/aquota.group: No such file or directory. Usage will not be substracted.

quotacheck: Checked 33 directories and 18 files

quotacheck: Old file not found.

quotacheck: Old file not found.

[root@localhost ~]# quotaon -avug

/dev/sda3 [/home]: group quotas turned on

/dev/sda3 [/home]: user quotas turned on

10、增加配额限制

[root@localhost ~]# edquota -u vbird1

Disk quotas for user vbird1 (uid 501):

Filesystem blocks soft hard inodes soft hard

/dev/sda3 32 8000 10000 8 0 0

单位是KB

[root@localhost ~]# edquota -u vbird2

。。。

[root@localhost ~]# edquota -p vbird1 vbird2 vbird3 vbird4 vbird5

11、查看配额

[root@localhost ~]# repquota -au

*** Report for user quotas on device /dev/sda3

Block grace time: 7days; Inode grace time: 7days

Block limits File limits

User used soft hard grace used soft hard grace

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

root -- 24 0 0 3 0 0

zxw -- 32 0 0 8 0 0

vbird1 -- 32 8000 10000 8 0 0

vbird2 -- 32 8000 10000 8 0 0

vbird3 -- 32 8000 10000 8 0 0

vbird4 -- 32 8000 10000 8 0 0

vbird5 -- 32 8000 10000 8 0 0

12、开始测试

[vbird1@localhost ~]$ ll -h

total 7.6M

-rw-rw-r--。 1 vbird1 vbird1 1.7M Dec 2 14:01 cont.txt

-rw-r--r--。 1 root root 49K Dec 2 13:59 install.log

-rw-rw-r--。 1 vbird1 vbird1 5.8M Dec 2 14:02 v.txt

[vbird1@localhost ~]$

vb1写文件到达到软限制

[vbird1@localhost ~]$ nl cont.txt 》》 v.txt

sda3: warning, user block quota exceeded.

达到软限制,警告

[vbird1@localhost ~]$ ll -h

total 9.5M

-rw-rw-r--。 1 vbird1 vbird1 1.7M Dec 2 14:01 cont.txt

-rw-r--r--。 1 root root 49K Dec 2 13:59 install.log

-rw-rw-r--。 1 vbird1 vbird1 7.7M Dec 2 14:02 v.txt

vb1写文件到达到硬限制

[vbird1@localhost ~]$ nl cont.txt 》》 v.txt

sda3: write failed, user block limit reached.

nl: write error: Disk quota exceeded

达到硬限制,报错

[vbird1@localhost ~]$

[vbird1@localhost ~]$ ll -h

total 9.8M

-rw-rw-r--。 1 vbird1 vbird1 1.7M Dec 2 14:01 cont.txt

-rw-r--r--。 1 root root 49K Dec 2 13:59 install.log

-rw-rw-r--。 1 vbird1 vbird1 8.1M Dec 2 14:03 v.txt

vb1再写就不让写了

[vbird1@localhost ~]$ nl cont.txt 》》 v.txt

nl: write error: Disk quota exceeded

[vbird1@localhost ~]$ ll -h

total 9.8M

-rw-rw-r--。 1 vbird1 vbird1 1.7M Dec 2 14:01 cont.txt

-rw-r--r--。 1 root root 49K Dec 2 13:59 install.log

-rw-rw-r--。 1 vbird1 vbird1 8.1M Dec 2 14:03 v.txt

上面就是CentOS 6修改磁盘配额限制的方法介绍了,本文主要介绍的是CentOS增加磁盘配额限制方面的修改,如果你需要减少磁盘配额限制不可使用本文方法进行修改。

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