Disk quotas under Linux

Restrict user or use of group disk space

Installing the Quote Package

[email protected] ~]# Yum Install quota

Format disk

[[email protected] ~]# mkfs.ext4 /dev/sdcmke2fs 1.41.12  (17-May-2010)/DEV/SDC  is entire device, not just one partition! to continue?  (y,n)  y file System label = Operating system: Linux block Size =4096  (log=2) chunked size =4096  (log=2) stride=0 blocks, stripe width=0  blocks1310720 inodes, 5242880 blocks262144 blocks  (5.00%)  reserved for  the super user first block of data =0maximum filesystem blocks=4294967296160 block  Groups32768 blocks per group, 32768 fragments per group8192 inodes  per groupSuperblock backups stored on blocks: 32768, 98304,  163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000 Writing Inode table :  Complete                              creating journal  (32768 blocks):  complete writing superblocks  and filesystem accounting information:  Complete This filesystem will be  automatically checked every 28 mounts or180 days, whichever  Comes first.  use tune2fs -c or -i to override.

Create directory Mount SDC

[Email protected] ~]# MKDIR/TMP/SDC

[Email protected] ~]# Mount-o REMOUNT,USRQUOTA,GRPQUOTA/TMP/SDC

Auto-mount [[Email protected] ~]# vim /etc/fstab ## /etc/fstab# created by  anaconda on Wed Oct  4 22:43:26 2017## Accessible  filesystems, by reference, are maintained under  '/dev/disk ' # See man  pages fstab (5),  findfs (8),  mount (8)  and/or blkid (8)  for more  info#/dev/mapper/volgroup-lv_root /                        ext4    defaults         1 1uuid=50f0c9fb-8d2a-4d5b-8c49-79fccc445240 /boot                     ext4    defaults        1 2/dev/mapper/ Volgroup-lv_swap swap                     swap    defaults        0 0tmpfs                    / Dev/shm                tmpfs    defaults        0 0devpts                   /dev/pts                 devpts  gid=5, mode=620  0 0sysfs                    /sys                &nbsP;    sysfs   defaults        0  0proc                     /proc                    proc    defaults         0 0/dev/sdc                 /tmp/sdc                 ext4    defaults,usrquota,grpquota      0 0

Detect disk quotas and generate quota files

Command: Quotacheck Description: Executes the quotacheck instruction, scans the partition that is attached to the system, and generates Quota.user and Quota.group files under the file system root of each partition
Parameters	Description
-C	Create a quota file
-V	Show instruction execution Process
-U	Calculate the number of directories and files occupied by each user ID when scanning disk space
-G	Calculate the number of directories and files occupied by each group ID when scanning disk space
-A	Scanning in the/etc/fstab file, there are partitions added to the quota settings
-R	Exclude the partition where the root directory resides
-D	Detailed instruction execution process for troubleshooting or understanding program execution

[[email protected] sdc]# ll total dosage 32-rw-------1 root root 6144 October 19:12 aquota.group-rw-------1 root root 6144 October 10 19:12 aquota.userdrwx------2 root root 16384 October 19:03 lost+found

Turn off SELinux

[Email protected] sdc]# Setenforce 0 #临时性关闭SELinux, restart failure setenforce:selinux is disabled

Permanently close selinux, after reboot takes effect

[[email protected] sdc]# vim /etc/selinux/config  # This file controls the state of SELinux on the  system.# selinux= can take one of these three values:#      enforcing - SELinux security policy is enforced.#      permissive - selinux prints warnings instead of enforcing . #     disabled - no selinux policy is loaded. selinux=disabled# selinuxtype= can take one of these two values:#      targeted - Targeted processes are protected,#      mls - multi level security protection. Selinuxtype=targeted 

user and group account quota settings

[[email protected] sdc]# useradd hyx[[email protected] sdc]# edquota - g hyxdisk quotas for group hyx  (gid 500):  filesystem                    blocks        soft       hard      inodes     soft     hard  /dev/sdc                            0           50          80           0        0         0~

Command: Edquota Function: Edit user and Group quota
Parameters	Description
-U	Set the user's quota, which is a preset parameter
-G	Set the quota of a group
-p (source user name)	Apply the quota settings of the source user to another user or group
-T	Set grace period

Activate disk quotas

[[email protected] sdc]# quotaon -ugv /tmp/sdc/ dev/sdc [/tmp/sdc]: group quotas turned on/dev/sdc [/tmp/sdc]: user  Quotas turned on 

Command: Quotaon Format: Quotaon parameter file system name The feature activates disk quotas; The file system root directory for each partition must have Quota.user and Quota.group configuration files
Parameters	Description
-U	To turn on the user's disk space limit
-G	Turn on disk space limits for groups
-A	Open in the/etc/fstab file, there is a space limit for the partition that joins the quota setting
-V	Show instruction execution Process

Verify:

[[Email protected] hyx]$ dd if=/dev/zero of=test bs=1k count=10 Records the 10+0   Read 10+0  writes 10240 bytes (10 kb) copied,0.000136044  seconds, 75.3 mb/seconds [[email protected]  HYX]$ LS -LH Total dosage  12k-rw-rw-r-- 1 hyx hyx 10k 10 month  10 20:20  test[[email protected] hyx]$ rm -rf *[[email protected] hyx]$ dd  if=/dev/zero of=test bs=1k count=60sdc: warning, user block quota  exceeded.sdc: warning, group block quota exceeded. Recorded the 60+0  read-in record 60+0  The write-out 61440 bytes (61 KB) have been copied,0.000374338  seconds, 164 mb/seconds [[email protected] hyx]$ ls - LH Total dosage  60k-rw-rw-r-- 1 hyx hyx 60k 10 Month  10 20:20 test[[email  Protected] hyx]$ rm -rf *[[email protected] hyx]$ dd if=/dev/zero  of=test bs=1k count=90sdc: write failed, user block limit reached.dd:  writing "Test":  The exceeded disk quota records the read-in record of the 81+0  80+0  81920 bytes (82 kb) copied,0.00050069  seconds, 164 mb/seconds [[email  PROTECTED] HYX]$ LS -LH Total dosage  80k-rw-rw-r-- 1 hyx hyx 80k 10 month   10 20:20 test

Maximum not exceeding 80K

[Email protected] sdc]# Tune2fs-l/DEV/SDC | grep "Block Size" block size:4096

Describes the blocks in disk quotas, where a block is 1K.

This article is from the "Poov blog" blog, make sure to keep this source http://xyhms.blog.51cto.com/12505169/1971458

Disk quotas under Linux