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创建一个10G分区，并格式为ext4文件系统；

(1) 要求其block大小为2048, 预留空间百分比为2, 卷标为MYDATA, 默认挂载属性包含acl；

(2) 挂载至/data/mydata目录，要求挂载时禁止程序自动运行，且不更新文件的访问时间戳；

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[root@centos ~]# fdisk -l   #不写注释的都是耍流氓

Disk /dev/sda: 171.8 GB, 171798691840 bytes
255 heads, 63 sectors/track, 20886 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: 0x00098b32

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          64      512000   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              64       20887   167259136   8e  Linux LVM

Disk /dev/sdb: 10.7 GB, 10737418240 bytes   #创建一个10G分区
255 heads, 63 sectors/track, 1305 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: 0x00000000 

Disk /dev/mapper/vg_centos-lv_root: 170.2 GB, 170196467712 bytes
255 heads, 63 sectors/track, 20691 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: 0x00000000

Disk /dev/mapper/vg_centos-lv_swap: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 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: 0x00000000

[root@centos ~]# fdisk /dev/sdb 
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x248136bc.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
         switch off the mode (command 'c') and change display units to
         sectors (command 'u').

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-1305, default 1): 
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-1305, default 1305): 
Using default value 1305

Command (m for help): wq
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
[root@centos ~]# fdisk -l

Disk /dev/sda: 171.8 GB, 171798691840 bytes
255 heads, 63 sectors/track, 20886 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: 0x00098b32

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          64      512000   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              64       20887   167259136   8e  Linux LVM

Disk /dev/sdb: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 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: 0x248136bc

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1        1305    10482381   83  Linux

Disk /dev/mapper/vg_centos-lv_root: 170.2 GB, 170196467712 bytes
255 heads, 63 sectors/track, 20691 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: 0x00000000

Disk /dev/mapper/vg_centos-lv_swap: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 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: 0x00000000
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[root@centos ~]# mkfs -b 2048 -t ext4 -L MYDATA -m 2 /dev/sdb1  #格式为ext4文件系统，其block大小为2048, 预留空间百分比为2, 卷标为MYDATA
mke2fs 1.41.12 (17-May-2010)
文件系统标签=MYDATA
操作系统:Linux
块大小=2048 (log=1)
分块大小=2048 (log=1)
Stride=0 blocks, Stripe width=0 blocks
655360 inodes, 5241190 blocks
262059 blocks (5.00%) reserved for the super user
第一个数据块=0
Maximum filesystem blocks=542113792
320 block groups
16384 blocks per group, 16384 fragments per group
2048 inodes per group
Superblock backups stored on blocks: 
	16384, 49152, 81920, 114688, 147456, 409600, 442368, 802816, 1327104, 
	2048000, 3981312

正在写入inode表: 完成                            
Creating journal (32768 blocks): 完成
Writing superblocks and filesystem accounting information: 完成

This filesystem will be automatically checked every 20 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.

[root@centos ~]# tune2fs -o acl /dev/sdb1  #默认挂载属性包含acl
tune2fs 1.41.12 (17-May-2010)
[root@centos ~]# mkdir -p /data/mydata && mount -o noexec,noatime /dev/sdb1 /data/mydata #挂载至/data/mydata目录，要求挂载时禁止程序自动运行，且不更新文件的访问时间戳
[root@centos ~]# echo $? 
0
[root@centos ~]# cd /data/
[root@centos data]# ll
总用量 2
drwxr-xr-x 3 root root 2048 12月 26 17:36 mydata
[root@centos data]# cd mydata/
[root@centos mydata]# ll
总用量 16
drwx------ 2 root root 16384 12月 26 17:36 lost+found
[root@centos mydata]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg_centos-lv_root
                      156G  3.8G  145G   3% /
tmpfs                 1.9G   72K  1.9G   1% /dev/shm
/dev/sda1             477M  160M  292M  36% /boot
/dev/sdb1             9.8G   13M  9.3G   1% /data/mydata
[root@centos mydata]#

2、创建一个大小为1G的swap分区，并创建好文件系统，并启用之；

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[root@centos ~]# fdisk /dev/sdb 
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x70af3aab.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
         switch off the mode (command 'c') and change display units to
         sectors (command 'u').

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)

Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-130, default 1): 
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-130, default 130): 
Using default value 130

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
 
[root@centos ~]# mkswap /dev/sdb1
Setting up swapspace version 1, size = 1044188 KiB
no label, UUID=85de9eea-a86d-48f4-a24d-00615a9812f8
[root@centos ~]# swapon /dev/sdb1 
[root@centos ~]# free -m
             total       used       free     shared    buffers     cached
Mem:          3816        517       3299          1         27        289
-/+ buffers/cache:        200       3615
Swap:         1019          0       1019
[root@centos ~]# echo "/dev/sdb1 swap swap defaults 0 0" >> /etc/fstab #swap现已加入开机挂载全家桶！

3、获取并列出当前系统上的所有磁盘设备；显示每个磁盘设备上每个分区相关的空间使用信息；

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[root@centos gogogogogogogogoo]# cat DiskInfo_Jerry.sh  #马哥说过，脚本就是命令的拼凑，所以，命令学好，脚本风骚。
#!/bin/bash
#Author: Jerry
lsblk
df -ahT

[root@centos gogogogogogogogoo]# bash DiskInfo_Jerry.sh 
NAME                          MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda                             8:0    0   160G  0 disk 
├─sda1                          8:1    0   500M  0 part /boot
└─sda2                          8:2    0 159.5G  0 part 
  ├─vg_centos-lv_root (dm-0)  253:0    0 158.5G  0 lvm  /
  └─vg_centos-lv_swap (dm-1)  253:1    0     1G  0 lvm  
sdb                             8:16   0    10G  0 disk 
└─sdb1                          8:17   0    10G  0 part 
  ├─vg_mage-mylv1-real (dm-3) 253:3    0     5G  0 lvm  
  │ ├─vg_mage-mylv1 (dm-2)    253:2    0     5G  0 lvm  
  │ └─vg_mage-snvg1 (dm-5)    253:5    0     5G  1 lvm  
  └─vg_mage-snvg1-cow (dm-4)  253:4    0   160M  1 lvm  
    └─vg_mage-snvg1 (dm-5)    253:5    0     5G  1 lvm  
sdc                             8:32   0    60G  0 disk 
└─sdc1                          8:33   0    60G  0 part 

Filesystem           Type                 Size  Used Avail Use% Mounted on
/dev/mapper/vg_centos-lv_root
                     ext4                 156G  3.4G  145G   3% /
proc                 proc                    0     0     0    - /proc
sysfs                sysfs                   0     0     0    - /sys
devpts               devpts                  0     0     0    - /dev/pts
tmpfs                tmpfs                1.9G   68K  1.9G   1% /dev/shm
/dev/sda1            ext4                 477M   35M  418M   8% /boot
/dev/mapper/vg_mage-mylv1
                     ext4                 4.8G   10M  4.6G   1% /users
none                 binfmt_misc             0     0     0    - /proc/sys/fs/binfmt_misc
vmware-vmblock       fuse.vmware-vmblock     0     0     0    - /var/run/vmblock-fuse

[root@centos gogogogogogogogoo]#

4、总结RAID的各个级别及其组合方式和性能的不同；

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RAID-0: 
	读、写性能提升；
	可用空间：N*min(S1,S2,...)
	无容错能力
	最少磁盘数：2, 2+

RAID-1：
	读性能提升、写性能略有下降；
	可用空间：1*min(S1,S2,...)
	有冗余能力
	最少磁盘数：2, 2+

RAID-4：
	1101, 0110, 1011

RAID-5：
	读、写性能提升
	可用空间：(N-1)*min(S1,S2,...)
	有容错能力：1块磁盘
	最少磁盘数：3, 3+

RAID-6：
	读、写性能提升
	可用空间：(N-2)*min(S1,S2,...)
	有容错能力：2块磁盘
	最少磁盘数：4, 4+

​ 

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混合类型
	RAID-10：
		读、写性能提升
		可用空间：N*min(S1,S2,...)/2
		有容错能力：每组镜像最多只能坏一块；
		最少磁盘数：4, 4+

5、创建一个大小为10G的RAID1，要求有一个空闲盘，而且CHUNK大小为128k;

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生产环境都是用服务器自带的磁盘阵列卡来做raid，具体详见各厂商的操作文档，此题我就跳过了，请老湿原谅我的直接。

6、创建一个大小为4G的RAID5设备，chunk大小为256k，格式化ext4文件系统，要求可开机自动挂载至/backup目录，而且不更新访问时间戳，且支持acl功能；

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生产环境都是用服务器自带的磁盘阵列卡来做raid，具体详见各厂商的操作文档，此题我就跳过了，请老湿原谅我的直接。
更新访问时间戳我要说一下，生产环境一般都是要更新访问时间戳的

7、接受一个以上文件路径作为参数；显示每个文件拥有的行数；总结说明本次共为几个文件统计了其行数；

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[root@centos gogogogogogogogoo]# bash Sum_wc-l.sh /etc/ssh/sshd_config /etc/fstab /etc/rc.local 
Number of rows in /etc/ssh/sshd_config is 138
Number of rows in /etc/fstab is 16
Number of rows in /etc/rc.local is 7
total of 3  files
[root@centos gogogogogogogogoo]# cat Sum_wc-l.sh 
#!/bin/bash
#
if [ $# -lt 1 ];then
    echo "At least one filesname "
    exit 2
fi

    for i in $*;do
       line=$(cat $i | wc -l)
       echo "Number of rows in $i is $line"
    done 

echo "total of $#  files"
[root@centos gogogogogogogogoo]#

8、传递两个以上字符串当作用户名；创建这些用户；且密码同用户名；(总结说明共创建了几个用户；

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[root@centos gogogogogogogogoo]# bash Creat_user.sh 
At least two username 
[root@centos gogogogogogogogoo]# bash Creat_user.sh abb1 abb2 abb3 abb4
Add user abb1 finished
Add user abb2 finished
Add user abb3 finished
Add user abb4 finished
total of Create 4 users
[root@centos gogogogogogogogoo]# cat Creat_user.sh 
#!/bin/bash

if [ $# -lt 2 ];then
    echo "At least two username "
    exit 2
fi    

    for i in $*;do
        if grep "^$i\>" /etc/passwd &> /dev/null;then
        
            echo "User $i exists"
	else
	    useradd $i
            echo $i | passwd --stdin $i &> /dev/null
            echo "Add user $i finished"
        fi

    done 
    
echo "total of Create $# users"
[root@centos gogogogogogogogoo]#

9、新建20个用户，visitor1-visitor20；计算他们的ID之和；

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[root@centos gogogogogogogogoo]# bash sum_userid.sh 
The users ID sum is: 10330
[root@centos gogogogogogogogoo]# cat sum_userid.sh 
#!/bin/bash

num=0

for i in {1..20};do
    if id visitor$i &> /dev/null;then
	echo "visitor$i exists"
        else
            useradd visitor$i
        id=$(grep "^visitor$i\>" /etc/passwd | cut -d: -f 3)
        let num+=$id
    fi
done

echo "The users ID sum is: $num"
[root@centos gogogogogogogogoo]#

10、分别统计/etc/rc.d/rc.sysinit、/etc/rc.d/init.d/functions和/etc/fstab文件中以#号开头的行数之和，以及总的空白行数；

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[root@centos jerry_go]# cat title10-2.sh 
#!/bin/bash
#Author:Jerry
#Description
#
#

    if [ -e $1 ]; then
        jinghao1=$(grep "^#" $1 | wc -l)
        blank_line1=$(grep "^$" $1 | wc -l)
        echo "The file $1 Jinghao_lines:$jinghao1    Blank_lines:$blank_line1  " 
    else
        echo "The file $1 no exist"
        exit 2
    fi
    
    if [ -e $2 ]; then
        jinghao2=$(grep "^#" $2 | wc -l)
        blank_line2=$(grep "^$" $2 | wc -l)
        echo "The file $2 Jinghao_lines:$jinghao2    Blank_lines:$blank_line2  " 
    else
        echo "The file $2 no exist"
        exit 2
   fi
   
   if [ -e $3 ]; then
        jinghao3=$(grep "^#" $3 | wc -l)
        blank_line3=$(grep "^$" $3 | wc -l)
        echo "The file $3 Jinghao_lines:$jinghao3    Blank_lines:$blank_line3  "  
    else
        echo "The file $3 no exist"
        exit 2
    fi

    echo "Total jinghao lines: $[$jinghao1+$jinghao2+$jinghao3]"   
    echo "Total blank lines: $[$blank_line1+$blank_line2+$blank_line3]" && exit 0

​

​ 

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走一个！come on baby！
[root@centos jerry_go]# bash title10-2.sh /etc/rc.d/rc.sysinit /etc/rc.d/init.d/functions /etc/fstab 
The file /etc/rc.d/rc.sysinit Jinghao_lines:44    Blank_lines:100  
The file /etc/rc.d/init.d/functions Jinghao_lines:43    Blank_lines:105  
The file /etc/fstab Jinghao_lines:8    Blank_lines:1  
Total jinghao lines: 95
Total blank lines: 206
[root@centos jerry_go]# 

异常的走一个！ 欧耶！
[root@centos jerry_go]# bash title10-2.sh /etc/rc.d/rc.sysinit /etc/rc.d/init.d/funct234ions /etc/fstab 
The file /etc/rc.d/rc.sysinit Jinghao_lines:44    Blank_lines:100  
The file /etc/rc.d/init.d/funct234ions no exist
[root@centos jerry_go]#

异常的再走一个！    
[root@centos jerry_go]# bash title10-2.sh /etc/rc.d/rc.sysinit /etc/rc.d/init.d/functions /etc/fst123ab 
The file /etc/rc.d/rc.sysinit Jinghao_lines:44    Blank_lines:100  
The file /etc/rc.d/init.d/functions Jinghao_lines:43    Blank_lines:105  
The file /etc/fst123ab no exist
[root@centos jerry_go]# 
   
最后发现井号的英文是well number ， 脚本里面用拼音实在是很low，不过我是刚开始嘛，who care......

11、显示当前系统上所有默认shell为bash的用户的用户名、UID以及此类所有用户的UID之和；

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[root@centos jerry_go]# cat week7_title11.sh
#!/bin/bash
#Author:Jerry
#Description
#
#

grep "bin/bash$" /etc/passwd  |cut -d":" -f1,3

for i in `grep "bin/bash$" /etc/passwd  |awk -F ":" '{print $3}'`;do
    let sum+=$i
done
               
 echo "Users ID sum is:$sum"

[root@centos jerry_go]# bash week7_title11.sh 
root:0
magedu:500
mamamamam:501
magedu1:502
abb1:503
abb2:504
abb3:505
abb4:506
visitor1:507
visitor2:508
visitor3:509
visitor4:510
visitor5:511
visitor6:512
visitor7:513
visitor8:514
visitor9:515
visitor10:516
visitor11:517
visitor12:518
visitor13:519
visitor14:520
visitor15:521
visitor16:522
visitor17:523
visitor18:524
visitor19:525
visitor20:526
Users ID sum is:13851

12、显示当前系统上所有，拥有附加组的用户的用户名；并说明共有多少个此类用户；

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[root@centos jerry_go]# bash week7_title12.sh 
bin
daemon
sys
adm
lp
mail
haldaemon
This users has 7.

[root@centos jerry_go]# cat week7_title12.sh 
#!/bin/bash
#Author:Jerry
#Description
#
grep -v ":$" /etc/group |awk -F ":" '{print $1}'
echo "This users has $(grep -v ":$" /etc/group |awk -F ":" '{print $1}'|wc -l)."

13、创建一个由至少两个物理卷组成的大小为20G的卷组；要求，PE大小为8M；而在卷组中创建一个大小为5G的逻辑卷mylv1，格式化为ext4文件系统，开机自动挂载至/users目录，支持acl；

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[root@centos ~]# pvdisplay   #先看看环境
  --- Physical volume ---
  PV Name               /dev/sda2
  VG Name               vg_centos
  PV Size               159.51 GiB / not usable 3.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              40834
  Free PE               0
  Allocated PE          40834
  PV UUID               1O2YO5-7puR-3Pfu-nR15-tqCc-JjPN-giIZeh
   
  "/dev/sdb1" is a new physical volume of "10.00 GiB"
  --- NEW Physical volume ---
  PV Name               /dev/sdb1
  VG Name               
  PV Size               10.00 GiB
  Allocatable           NO
  PE Size               0   
  Total PE              0
  Free PE               0
  Allocated PE          0
  PV UUID               dmUkps-1j6e-q50O-yOh8-nBlT-lw6t-nGKnat
   
  "/dev/sdc1" is a new physical volume of "60.00 GiB"
  --- NEW Physical volume ---
  PV Name               /dev/sdc1
  VG Name               
  PV Size               60.00 GiB
  Allocatable           NO
  PE Size               0   
  Total PE              0
  Free PE               0
  Allocated PE          0
  PV UUID               WfoY2H-efkl-qx0z-Yetm-wyV0-3lUU-u815Aq
   
[root@centos ~]# vgcreate -s 8m vg_mage /dev/sdb1 /dev/sdc1  #创建一个由至少两个物理卷组成的大小为20G的卷组，我这里不止了，无伤大雅。
  Volume group "vg_mage" successfully created
[root@centos ~]# lvcreate -L 5G -n mylv1 vg_mage && mkfs.ext4 /dev/vg_mage/mylv1 #在卷组中创建一个大小为5G的逻辑卷mylv1，格式化为ext4文件系统
[root@centos ~]# mkdir /users && echo "/dev/vg_mage/mylv1 /users ext4 defaults,acl 0 0" >> /etc/fstab  #自动挂载至/users目录，支持acl
[root@centos ~]# cat /etc/fstab 

#
# /etc/fstab
# Created by anaconda on Thu Jun 23 18:40:21 2016
#
# 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/vg_centos-lv_root /                       ext4    defaults        1 1
UUID=7b714956-acd7-44cb-af53-4eacde793fd9 /boot                   ext4    defaults        1 2
#/dev/mapper/vg_centos-lv_swap swap                    swap    defaults        0 0
tmpfs                   /dev/shm                tmpfs   defaults        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0
/dev/vg_mage/mylv1 /users ext4 defaults,acl 0 0

 [root@centos ~]#

14、新建用户magedu；其家目录为/users/magedu，而后su切换至此用户，复制多个文件至家目录；

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[root@centos ~]# useradd magedu -d /users/magedu
[root@centos ~]# su - magedu
[magedu@centos ~]$ cp /etc/*.conf ~
[magedu@centos ~]$ ls -al
总用量 188
drwx------  4 magedu magedu  4096 12月 27 12:52 .
drwxr-xr-x. 4 root   root    4096 12月 27 12:48 ..
-rw-r--r--  1 magedu magedu   148 12月 27 12:52 asound.conf
-rw-r--r--  1 magedu magedu    18 5月  11 2016 .bash_logout
-rw-r--r--  1 magedu magedu   176 5月  11 2016 .bash_profile
-rw-r--r--  1 magedu magedu   124 5月  11 2016 .bashrc
-rw-r--r--  1 magedu magedu  1780 12月 27 12:52 cas.conf
-rw-r--r--  1 magedu magedu 21214 12月 27 12:52 dnsmasq.conf
-rw-r--r--  1 magedu magedu   519 12月 27 12:52 dracut.conf
-rw-r--r--  1 magedu magedu    20 12月 27 12:52 fprintd.conf
-rw-r--r--  1 magedu magedu     0 12月 27 12:52 gai.conf
drwxr-xr-x  2 magedu magedu  4096 11月 12 2010 .gnome2
-rw-r--r--  1 magedu magedu     9 12月 27 12:52 host.conf
-rw-r--r--  1 magedu magedu     0 12月 27 12:52 init.conf
-rw-r--r--  1 magedu magedu  8120 12月 27 12:52 kdump.conf
-rw-r--r--  1 magedu magedu   449 12月 27 12:52 krb5.conf
-rw-r--r--  1 magedu magedu  1662 12月 27 12:52 latrace.conf
-rw-r--r--  1 magedu magedu    47 12月 27 12:52 ld.so.conf
-rw-r--r--  1 magedu magedu  2293 12月 27 12:52 libuser.conf
-rw-r--r--  1 magedu magedu   662 12月 27 12:52 logrotate.conf
-rw-r--r--  1 magedu magedu 10814 12月 27 12:52 ltrace.conf
-rw-r--r--  1 magedu magedu   827 12月 27 12:52 mke2fs.conf
drwxr-xr-x  4 magedu magedu  4096 6月  23 2016 .mozilla
-rw-r--r--  1 magedu magedu  2620 12月 27 12:52 mtools.conf
-rw-r--r--  1 magedu magedu  1688 12月 27 12:52 nsswitch.conf
-rw-r--r--  1 magedu magedu  1698 12月 27 12:52 ntp.conf
-rw-r--r--  1 magedu magedu   370 12月 27 12:52 pm-utils-hd-apm-restore.conf
-rw-r--r--  1 magedu magedu   789 12月 27 12:52 prelink.conf
-rw-r--r--  1 magedu magedu   966 12月 27 12:52 readahead.conf
-rw-r--r--  1 magedu magedu    81 12月 27 12:52 resolv.conf
-rw-r--r--  1 magedu magedu  2875 12月 27 12:52 rsyslog.conf
-rw-r--r--  1 magedu magedu   216 12月 27 12:52 sestatus.conf
-rw-r--r--  1 magedu magedu  6717 12月 27 12:52 smartd.conf
-rw-r--r--  1 magedu magedu   256 12月 27 12:52 sos.conf
-rw-r--r--  1 magedu magedu  1800 12月 27 12:52 sysctl.conf
-rw-r--r--  1 magedu magedu  1309 12月 27 12:52 tpvmlp.conf
-rw-r--r--  1 magedu magedu    45 12月 27 12:52 Trolltech.conf
-rw-r--r--  1 magedu magedu   485 12月 27 12:52 updatedb.conf
-rw-r--r--  1 magedu magedu  3008 12月 27 12:52 warnquota.conf
-rw-r--r--  1 magedu magedu   969 12月 27 12:52 yum.conf
[magedu@centos ~]$

​

15、扩展mylv1至9G，确保扩展完成后原有数据完全可用；

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lvextend -L +4G /dev/mapper/myvg-mylv1 
resize2fs /dev/mapper/myvg-mylv1

16、缩减mylv1至7G，确保缩减完成后原有数据完全可用；

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# umount /dev/vg_mage/mylv1
# e2fsck -f /dev/vg_mage/mylv1
# resize2fs /dev/vg_mage/mylv11 7G
# lvreduce -L 7G /dev/vg_mage/mylv1
# mount /dev/vg_mage/mylv1 /users/

17、对mylv1创建快照，并通过备份数据；要求保留原有的属主属组等信息；

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[root@centos users]# lvcreate -s -l 20 -n snvg1 -p r /dev/vg_mage/mylv1
Logical volume "snvg1" created.
0%