linux磁盘配额

限定用户或组对磁盘空间的使用

[root@localhost ~]# rpm -qf `which quota` quota-4.01-11.el7.x86_64

[root@localhost ~]#mkfs.ext4 /dev/sdc3 [root@localhost ~]#mkdir /tmp/sdc3 [root@localhost ~]#mount /dev/sdc3 /tmp/sdc3/

[root@localhost ~]# mount -o remount,usrquota,grpquota /tmp/sdc3/ [root@localhost ~]# mount

/dev/sdc3 on /tmp/sdc3 type ext4 (rw,relatime,quota,usrquota,grpquota,data=ordered)

永久生效

/dev/sdc3                                 /tmp/sdc3               ext4    defaults,usrquota,grpquota  0 0 写在/tec/fstab

[root@localhost ~]# tail -n 1 /etc/fstab /dev/sdc3                                 /tmp/sdc3               ext4    defaults,usrquota,grpquota  0 0

#检测磁盘配额并生成配额的文件

[root@localhost ~]#quotacheck -cugv /tmp/sdc3/

[root@localhost ~]# ll -a /tmp/sdc3/ total 29 drwxr-xr-x   3 root root  1024 Dec  2 17:48 . drwxrwxrwt. 15 root root  4096 Dec  2 17:48 .. -rw-------   1 root root  6144 Dec  2 17:48 aquota.group -rw-------   1 root root  6144 Dec  2 17:48 aquota.user drwx------   2 root root 12288 Dec  2 17:34 lost+found

确保关闭selinux 与selinux有关 [root@localhost ~]# getenforce  #disabled关闭状态 Disabled

[root@localhost ~]# vim /etc/selinux/config  #没关的时候打开文件 设置SELINUX=disabled

#用户和组的配额设置

[root@localhost ~]# useradd hcr [root@localhost ~]# id hcr uid=5007(hcr) gid=5007(hcr) groups=5007(hcr) [root@localhost ~]# edquota -g hcr  #自动打开vim 设置       1 Disk quotas for group hcr (gid 5007):       2   Filesystem                   blocks       soft       hard     inodes     soft     hard       3   /dev/sdc3                         80         50         80          0        0       # 0

#激活磁盘配额

[root@localhost ~]# quotaon -ugv /tmp/sdc3/ /dev/sdc3 [/tmp/sdc3]: group quotas turned on /dev/sdc3 [/tmp/sdc3]: user quotas turned on

#测试

[root@localhost ~]# mkdir /tmp/sdc3/test  #在sdc3下创建test目录 然后切换到hcr用户

[hcr@localhost test]$ dd if=/dev/zero of=hcr.txt bs=1k count=90     #block 1k 设置hard容量80k 所以超过80k报错error 大于50k会报警 sdc3: warning, group block quota exceeded. sdc3: write failed, group block limit reached. dd: error writing ‘hcr.txt’: Disk quota exceeded 81+0 records in 80+0 records out 81920 bytes (82 kB) copied, 0.000472524 s, 173 MB/s

[hcr@localhost test]$ ll -h total 80K -rw-rw-r-- 1 hcr hcr 80K Dec  2 18:13 hcr.txt #说明 [root@localhost ~]# tune2fs -l /dev/sdc3 | grep size   #查看blocksize Filesystem features:      has_journal ext_attr resize_inode dir_index filetype needs_recovery extent 64bit flex_bg sparse_super huge_file uninit_bg dir_nlink extra_isize Block size:               1024 Fragment size:            1024 Group descriptor size:    64 Flex block group size:    16 Inode size:              128

#说明磁盘配额中的blocks 一个block是1K