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debian5.0添加acl功能

1.debian默认没有安装

下面来安装apt-get install acl

安装之后用fidisk -l

sa:~# fdisk -l

Disk /dev/hdb: 40.0 GB, 40020664320 bytes

255 heads, 63 sectors/track, 4865 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0xd274d274

   Device Boot      Start         End      Blocks   Id  System

/dev/hdb1   *           1        4660    37431418+  83  Linux

/dev/hdb2            4661        4865     1646662+   5  Extended

/dev/hdb5            4661        4865     1646631   82  Linux swap / Solaris

加载到hadb1 盘下面

mount -o remount,acl /dev/hdb1

setfacl -m g:test:rw data 指行没有报错

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参照文档如下

Fully patched Kernel version 2.4 or 2.6

Having the ACL utilities

Having a slightly modified version of file utils.

We are going to work with kernel version 2.6 because 2.6 series of kernels makes some attempts to standardise the ACL methods.

<b>Verifying Kernel support for ACL</b>

Checking log files

#cat /boot/config-2.6.15.1-386 | grep _ACL

This should give the below results

CONFIG_EXT3_FS_POSIX_ACL=y

CONFIG_EXT2_FS_POSIX_ACL=y

CONFIG_XFS_POSIX_ACL=y

<b>Install ACL in Debian</b>

#apt-get install acl

<b>Activating ACL support in a partition (Ext3)</b>

By default kernel version 2.6 supports ext2, ext3, jfs, xfs filesystems for ACL

If you have already partition(ex:-hda6) in your hard disk you need to use the following command

#mount -o remount,acl /dev/hda6

Now we need to modify the /etc/fstab file and add the ACL options

/dev/hda6 / ext3 `acl`,defaults,errors=remount-ro 0 1

<b>Adding and Modifying ACL</b>

In Order to use ACL under linux you need to use two commands setfacl and getfacl

Now we will see each one with an example