python第七周答案_马哥2016全新Linux+Python高端运维班第七周作业
1、創建一個10G分區，并格式為ext4文件系統；
[root@localhost?~]#?fdisk?/dev/sdb
歡迎使用?fdisk?(util-linux?2.23.2)。
更改將停留在內存中，直到您決定將更改寫入磁盤。
使用寫入命令前請三思。
Device?does?not?contain?a?recognized?partition?table
使用磁盤標識符?0x5dda4f37?創建新的?DOS?磁盤標簽。
命令(輸入?m?獲取幫助)：n
Partition?type:
p???primary?(0?primary,?0?extended,?4?free)
e???extended
Select?(default?p):?p
分區號?(1-4，默認?1)：4
起始?扇區?(2048-41943039，默認為?2048)：
將使用默認值?2048
Last?扇區,?+扇區?or?+size{K,M,G}?(2048-41943039，默認為?41943039)：
將使用默認值?41943039
分區?4?已設置為?Linux?類型，大小設為?20?GiB
命令(輸入?m?獲取幫助)：w
The?partition?table?has?been?altered!
Calling?ioctl()?to?re-read?partition?table.
正在同步磁盤。
[root@localhost?~]#?cat?/proc/partitions
major?minor??#blocks??name
8???????16???20971520?sdb
8???????20???20970496?sdb4
11????????0????1048575?sr0
8????????0???41943040?sda
8????????1?????512000?sda1
8????????2????2098176?sda2
8????????3???39331840?sda3
[root@localhost?~]#?mke2fs?-t?ext4?-b?2048?-m?2?-L?MYDATA?/dev/sdb4
mke2fs?1.42.9?(28-Dec-2013)
文件系統標簽=MYDATA
OS?type:?Linux
塊大小=2048?(log=1)
分塊大小=2048?(log=1)
Stride=0?blocks,?Stripe?width=0?blocks
1310720?inodes,?10485248?blocks
209704?blocks?(2.00%)?reserved?for?the?super?user
第一個數據塊=0
Maximum?filesystem?blocks=278921216
640?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,?5619712,?10240000
Allocating?group?tables:?完成
正在寫入inode表:?完成
Creating?journal?(32768?blocks):?完成
Writing?superblocks?and?filesystem?accounting?information:?完成
(2)?掛載至/data/mydata目錄，要求掛載時禁止程序自動運行，且不更新文件的訪問時間戳；
[root@localhost?~]#?mkdir?-pv?/data/mydata
mkdir:?已創建目錄?"/data"
mkdir:?已創建目錄?"/data/mydata"
[root@localhost?~]#?echo?'/dev/sdb4?/data/mydata?ext4?defaults,noexec,nodiratime,acl?0?0'?>>?/etc/fstab
[root@localhost?~]#?mount?-a
[root@localhost?~]#?mount?|?grep?/dev/sdb4
/dev/sdb4?on?/data/mydata?type?ext4?(rw,noexec,nodiratime,relatime,seclabel,data=ordered)
2、創建一個大小為1G的swap分區，并創建好文件系統，并啟用之；
[root@localhost?~]#?fdisk?/dev/sdb
歡迎使用?fdisk?(util-linux?2.23.2)。
更改將停留在內存中，直到您決定將更改寫入磁盤。
使用寫入命令前請三思。
Device?does?not?contain?a?recognized?partition?table
使用磁盤標識符?0xce54aef7?創建新的?DOS?磁盤標簽。
命令(輸入?m?獲取幫助)：n
Partition?type:
p???primary?(0?primary,?0?extended,?4?free)
e???extended
Select?(default?p):?p
分區號?(1-4，默認?1)：1
起始?扇區?(2048-41943039，默認為?2048)：+1G
Last?扇區,?+扇區?or?+size{K,M,G}?(2097152-41943039，默認為?41943039)：+1G
分區?1?已設置為?Linux?類型，大小設為?1?GiB
命令(輸入?m?獲取幫助)：t
已選擇分區?1
Hex?代碼(輸入?L?列出所有代碼)：82
已將分區“Linux”的類型更改為“Linux?swap?/?Solaris”
命令(輸入?m?獲取幫助)：w
The?partition?table?has?been?altered!
Calling?ioctl()?to?re-read?partition?table.
正在同步磁盤。
[root@localhost?~]#?partx?-a?/dev/sdb
partx:?/dev/sdb:?error?adding?partition?1
[root@localhost?~]#?cat?/proc/partitions
major?minor??#blocks??name
8???????16???20971520?sdb
8???????17????1048576?sdb1
11????????0????1048575?sr0
8????????0???41943040?sda
8????????1?????512000?sda1
8????????2????2098176?sda2
8????????3???39331840?sda3
[root@localhost?~]#?mkswap?/dev/sdb1
正在設置交換空間版本?1，大小?=?1048572?KiB
無標簽，UUID=3c4d09f9-3912-4e75-90c8-7a72a3a5c3f7
[root@localhost?~]#?swapon?-a?/dev/sdb1
[root@localhost?~]#?swapon?-s
文件名????類型??大小?已用?權限
/dev/sda2???????????????????????????????partition?2098172?0?-1
/dev/sdb1???????????????????????????????partition?1048572?0?-2
3、寫一個腳本
(1)、獲取并列出當前系統上的所有磁盤設備；
(2)、顯示每個磁盤設備上每個分區相關的空間使用信息；
[root@localhost?~]#?cat?fdisklist.sh
#!/bin/bash
echo?-e?"All?of?disk:\n`fdisk?-l?|?grep?-o?"[sh]d[a-z]"?|?uniq?`\n"
echo?"The?Disk?information:"
for?i?in?`fdisk?-l?|?grep?"^/dev/[sh]d[a-z][1-9]"?|?cut?-d'?'?-f1`;?do
df?-h?$i
done
4、總結RAID的各個級別及其組合方式和性能的不同；
RAID-0:
讀、寫性能提升；
可用空間：N*min(S1,S2,...)
無容錯能力
最少磁盤數：2,?2+
RAID-1：
讀性能提升、寫性能略有下降；
可用空間：1*min(S1,S2,...)
有冗余能力
最少磁盤數：2,?2+
RAID-4：
1101,?0110,?1011
RAID-5：
讀、寫性能提升
可用空間：(N-1)*min(S1,S2,...)
有容錯能力：1塊磁盤
最少磁盤數：3,?3+
RAID-6：
讀、寫性能提升
可用空間：(N-2)*min(S1,S2,...)
有容錯能力：2塊磁盤
最少磁盤數：4,?4+
混合類型
RAID-10：
讀、寫性能提升
可用空間：N*min(S1,S2,...)/2
有容錯能力：每組鏡像最多只能壞一塊；
最少磁盤數：4,?4+
5、創建一個大小為10G的RAID1，要求有一個空閑盤，而且CHUNK大小為128k;
[root@localhost?~]#?fdisk?-l?/dev/sdb
磁盤?/dev/sdb：21.5?GB,?21474836480?字節，41943040?個扇區
Units?=?扇區?of?1?*?512?=?512?bytes
扇區大小(邏輯/物理)：512?字節?/?512?字節
I/O?大小(最小/最佳)：512?字節?/?512?字節
磁盤標簽類型：dos
磁盤標識符：0xd5cbd06b
設備?Boot??????Start?????????End??????Blocks???Id??System
/dev/sdb1????????????2048????10487807?????5242880???83??Linux
/dev/sdb2????????10487808????20973567?????5242880???83??Linux
/dev/sdb3????????20973568????31459327?????5242880???83??Linux
[root@localhost?~]#?mdadm?-C?/dev/md0?-n?2?-l?1?-a?yes?-c?128?-x?1?/dev/{sdb1,sdb2,sdb3}
mdadm:?Note:?this?array?has?metadata?at?the?start?and
may?not?be?suitable?as?a?boot?device.??If?you?plan?to
store?'/boot'?on?this?device?please?ensure?that
your?boot-loader?understands?md/v1.x?metadata,?or?use
--metadata=0.90
Continue?creating?array??y
mdadm:?Defaulting?to?version?1.2?metadata
mdadm:?array?/dev/md0?started.
[root@localhost?~]#?mdadm?-D?/dev/md0
/dev/md0:
Version?:?1.2
Creation?Time?:?Thu?Sep?22?20:10:26?2016
Raid?Level?:?raid1
Array?Size?:?5238784?(5.00?GiB?5.36?GB)
Used?Dev?Size?:?5238784?(5.00?GiB?5.36?GB)
Raid?Devices?:?2
Total?Devices?:?3
Persistence?:?Superblock?is?persistent
Update?Time?:?Thu?Sep?22?20:10:42?2016
State?:?clean,?resyncing
Active?Devices?:?2
Working?Devices?:?3
Failed?Devices?:?0
Spare?Devices?:?1
Resync?Status?:?24%?complete
Name?:?localhost.localdomain:0??(local?to?host?localhost.localdomain)
UUID?:?e64d1157:6dd08d0d:10795fdd:b181bfec
Events?:?3
Number???Major???Minor???RaidDevice?State
0???????8???????17????????0??????active?sync???/dev/sdb1
1???????8???????18????????1??????active?sync???/dev/sdb2
2???????8???????19????????-??????spare???/dev/sdb3
6、創建一個大小為4G的RAID5設備，chunk大小為256k，格式化ext4文件系統，要求可開機自動掛載至/backup目錄，而且不更新訪問時間戳，且支持acl功能；
[root@localhost?~]#?fdisk?-l?/dev/sdb
磁盤?/dev/sdb：21.5?GB,?21474836480?字節，41943040?個扇區
Units?=?扇區?of?1?*?512?=?512?bytes
扇區大小(邏輯/物理)：512?字節?/?512?字節
I/O?大小(最小/最佳)：512?字節?/?512?字節
磁盤標簽類型：dos
磁盤標識符：0xa5bc239d
設備?Boot??????Start?????????End??????Blocks???Id??System
/dev/sdb1????????????2048?????2099199?????1048576???83??Linux
/dev/sdb2?????????2099200?????4196351?????1048576???83??Linux
/dev/sdb3?????????4196352?????8390655?????2097152???83??Linux
[root@localhost?~]#?mdadm?-C?/dev/md1?-n?3?-l?5?-a?yes?-c?256?/dev/{sdb1,sdb2,sdb3}
mdadm:?largest?drive?(/dev/sdb3)?exceeds?size?(1047552K)?by?more?than?1%
Continue?creating?array??y
mdadm:?Defaulting?to?version?1.2?metadata
mdadm:?array?/dev/md1?started.
[root@localhost?~]#?mdadm?-D?/dev/md1
/dev/md1:
Version?:?1.2
Creation?Time?:?Thu?Sep?22?20:18:12?2016
Raid?Level?:?raid5
Array?Size?:?2095104?(2046.34?MiB?2145.39?MB)
Used?Dev?Size?:?1047552?(1023.17?MiB?1072.69?MB)
Raid?Devices?:?3
Total?Devices?:?3
Persistence?:?Superblock?is?persistent
Update?Time?:?Thu?Sep?22?20:18:30?2016
State?:?clean
Active?Devices?:?3
Working?Devices?:?3
Failed?Devices?:?0
Spare?Devices?:?0
Layout?:?left-symmetric
Chunk?Size?:?256K
Name?:?localhost.localdomain:1??(local?to?host?localhost.localdomain)
UUID?:?0ad0589c:6960c722:b5c15886:8e1dd531
Events?:?18
Number???Major???Minor???RaidDevice?State
0???????8???????17????????0??????active?sync???/dev/sdb1
1???????8???????18????????1??????active?sync???/dev/sdb2
3???????8???????19????????2??????active?sync???/dev/sdb3
[root@localhost?~]#?cat?/proc/mdstat
Personalities?:?[raid6]?[raid5]?[raid4]
md1?:?active?raid5?sdb3[3]?sdb2[1]?sdb1[0]
2095104?blocks?super?1.2?level?5,?256k?chunk,?algorithm?2?[3/3]?[UUU]
unused?devices:?
[root@localhost?~]#?mkdir?/backup
[root@localhost?~]#?mke2fs?-t?ext4?/dev/md1
mke2fs?1.42.9?(28-Dec-2013)
文件系統標簽=
OS?type:?Linux
塊大小=4096?(log=2)
分塊大小=4096?(log=2)
Stride=64?blocks,?Stripe?width=128?blocks
131072?inodes,?523776?blocks
26188?blocks?(5.00%)?reserved?for?the?super?user
第一個數據塊=0
Maximum?filesystem?blocks=536870912
16?block?groups
32768?blocks?per?group,?32768?fragments?per?group
8192?inodes?per?group
Superblock?backups?stored?on?blocks:
32768,?98304,?163840,?229376,?294912
Allocating?group?tables:?完成
正在寫入inode表:?完成
Creating?journal?(8192?blocks):?完成
Writing?superblocks?and?filesystem?accounting?information:?完成
[root@localhost?~]#?echo?'/dev/md1?/backup?ext4?defaults,noatime,acl?0?0'?>>?/etc/fstab
[root@localhost?~]#?mount?-a
[root@localhost?~]#?mount?|?grep?/dev/md1
/dev/md1?on?/backup?type?ext4?(rw,noatime,seclabel,stripe=128,data=ordered)
7、寫一個腳本
(1)?接受一個以上文件路徑作為參數；
(2)?顯示每個文件擁有的行數；
(3)?總結說明本次共為幾個文件統計了其行數；
[root@localhost?~]#?cat?yicxlines.sh
#!/bin/bash
if?[?$#?-eq?0?];then
echo?"Please?give?a?file?name?at?least!"
exit?1
fi
for?i?in?$*
do
echo?"$i?have?$(wc?-l?$i?|?cut?-d'?'?-f1)lines"
done
echo?"yicx?$#?Files?Lines!"
8、寫一個腳本
(1)?傳遞兩個以上字符串當作用戶名；
(2)?創建這些用戶；且密碼同用戶名；
(3)?總結說明共創建了幾個用戶；
[root@localhost?~]#?cat?yicx01user.sh
#!/bin/bash
if?[?$#?-lt?2?];then
echo?"Please?give?2?usernames?at?least!"
exit?1
fi
for?i?in?$*;do
useradd?$i
echo?"$i:$i"?|?chpasswd
done
echo?"Total?Add?$#?users!"
9、寫一個腳本，新建20個用戶，visitor1-visitor20；計算他們的ID之和；
[root@localhost?~]#?cat?yicx02id.sh
#!/bin/bash
declare?-i?yicx02id
for?i?in?{1..20}
do
useradd?visitor$i
let?yicx02id+=$(id?-u?visitor$i)
done
echo?"Total?id?is?$yicx02id?!"
10、寫一腳本，分別統計/etc/rc.d/rc.sysinit、/etc/rc.d/init.d/functions和/etc/fstab文件中以#號開頭的行數之和，以及總的空白行數；
[root@localhost?~]#?cat?yicx03lines.sh
#!/bin/bash
declarc?-i?line
declarc?-i?nullline
for?i?in?{/etc/rc.d/rc.sysinit,/etc/rc.d/init.d/funtions,/etc/fstab}
do
let?line+=$(grep?'^#'?$i?|?wc?-l?|?cut?-d'?'?-f1)
let?nullline+=$(grep??'^[[:space:]]*$'?$i?|?wc?-l?|?cut?-d'?'?-f1)
done
echo?"The?lines?with?a?beginning?of?'#'?is?$line?lines?!"
echo?"The?lines?with?nothing?is?$nullline?lines?!"
11、寫一個腳本，顯示當前系統上所有默認shell為bash的用戶的用戶名、UID以及此類所有用戶的UID之和；
[root@localhost?~]#?cat?yicx04uid.sh
#!/bin/bash
declare?-i?yicx04_uid
grep?"/bin/bash"?/etc/passwd?|?cut?-d':'?-f?1,3
for?i?in?`grep?"/bin/bash"?/etc/passwd?|?cut?-d':'?-f?3`;do
let?yicx04_uid+=i
done
echo?"The?uid?yicx04?is?$yicx04_uid?!"
12、寫一個腳本，顯示當前系統上所有，擁有附加組的用戶的用戶名；并說明共有多少個此類用戶；
[root@localhost?~]#?cat?yicx05uid.sh
#!/bin/bash
declare?-i?yicx05_user
for?i?in?`cut?-d:?-f1?/etc/passwd`;?do
group=`id?$i?|?awk?-F,?'{print?$2}'?`
if?[?-n?"$group"?];then
echo?"$i"
let?yicx05_user+=1
fi
done
echo?"yicx05_user?is?$yicx05_user?!"
13、創建一個由至少兩個物理卷組成的大小為20G的卷組；要求，PE大小為8M；而在卷組中創建一個大小為5G的邏輯卷mylv1，格式化為ext4文件系統，開機自動掛載至/users目錄，支持acl；
[root@localhost?~]#?fdisk?-l?/dev/sdb
磁盤?/dev/sdb：21.5?GB,?21474836480?字節，41943040?個扇區
Units?=?扇區?of?1?*?512?=?512?bytes
扇區大小(邏輯/物理)：512?字節?/?512?字節
I/O?大小(最小/最佳)：512?字節?/?512?字節
磁盤標簽類型：dos
磁盤標識符：0xf99b55ca
設備?Boot??????Start?????????End??????Blocks???Id??System
/dev/sdb1????????????2048????20973567????10485760???8e??Linux?LVM
/dev/sdb2????????20973568????41943039????10484736???8e??Linux?LVM
[root@localhost?~]#?pvcreate?/dev/sdb{1,2}
Physical?volume?"/dev/sdb1"?successfully?created
Physical?volume?"/dev/sdb2"?successfully?created
[root@localhost?~]#?pvs
PV?????????VG???Fmt??Attr?PSize??PFree
/dev/sdb1???????lvm2?---??10.00g?10.00g
/dev/sdb2???????lvm2?---??10.00g?10.00g
[root@localhost?~]#?vgcreate?-s?8M?myvg1?/dev/sdb1?/dev/sdb2
Volume?group?"myvg1"?successfully?created
[root@localhost?~]#?vgdisplay?-v?myvg1
Using?volume?group(s)?on?command?line.
---?Volume?group?---
VG?Name???????????????myvg1
System?ID
Format????????????????lvm2
Metadata?Areas????????2
Metadata?Sequence?No??1
VG?Access?????????????read/write
VG?Status?????????????resizable
MAX?LV????????????????0
Cur?LV????????????????0
Open?LV???????????????0
Max?PV????????????????0
Cur?PV????????????????2
Act?PV????????????????2
VG?Size???????????????19.98?GiB
PE?Size???????????????8.00?MiB
Total?PE??????????????2558
Alloc?PE?/?Size???????0?/?0
Free??PE?/?Size???????2558?/?19.98?GiB
VG?UUID???????????????hWmK8b-35ai-dekR-cN1g-Il0E-daR7-eJ91Bd
---?Physical?volumes?---
PV?Name???????????????/dev/sdb1
PV?UUID???????????????3720RW-0LJ3-0DD5-Ucvu-vCuO-YbRl-OBUtaV
PV?Status?????????????allocatable
Total?PE?/?Free?PE????1279?/?1279
PV?Name???????????????/dev/sdb2
PV?UUID???????????????JeSNUv-ItSw-EpbH-ynBw-P1YF-q6YB-b2waAB
PV?Status?????????????allocatable
Total?PE?/?Free?PE????1279?/?1279
[root@localhost?~]#?lvcreate?-L?5G?-n?mylv1?myvg1
Logical?volume?"mylv1"?created.
[root@localhost?~]#?lvs
LV????VG????Attr???????LSize?Pool?Origin?Data%??Meta%??Move?Log?Cpy%Sync?Convert
mylv1?myvg1?-wi-a-----?5.00g
[root@localhost?~]#?mke2fs?-t?ext4?/dev/myvg1/mylv1
mke2fs?1.42.9?(28-Dec-2013)
文件系統標簽=
OS?type:?Linux
塊大小=4096?(log=2)
分塊大小=4096?(log=2)
Stride=0?blocks,?Stripe?width=0?blocks
327680?inodes,?1310720?blocks
65536?blocks?(5.00%)?reserved?for?the?super?user
第一個數據塊=0
Maximum?filesystem?blocks=1342177280
40?block?groups
32768?blocks?per?group,?32768?fragments?per?group
8192?inodes?per?group
Superblock?backups?stored?on?blocks:
32768,?98304,?163840,?229376,?294912,?819200,?884736
Allocating?group?tables:?完成
正在寫入inode表:?完成
Creating?journal?(32768?blocks):?完成
Writing?superblocks?and?filesystem?accounting?information:?完成
[root@localhost?~]#?mkdir?users
[root@localhost?~]#?echo?"/dev/myvg1/mylv1????/users???ext4??defaults,acl,nodiratime??0?0"??>>?/etc/fstab
[root@localhost?~]#?cat?/etc/fstab
#
#?/etc/fstab
#?Created?by?anaconda?on?Wed?Sep??7?04:58:21?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
#
UUID=4ec7ddf7-9741-4677-a095-36279fca2219?/???????????????????????xfs?????defaults????????0?0
UUID=4d6d85fd-d048-4d9f-9e6b-2a0772c7f24a?/boot???????????????????xfs?????defaults????????0?0
UUID=fe9b3a87-ffee-497f-8ac6-1af99fe9fa13?swap????????????????????????swap????defaults????????0?0
/dev/myvg1/mylv1????/users???ext4??defaults,acl,nodiratime??0?0
[root@centos7study?data]#?mount?-a
14、新建用戶magedu；其家目錄為/users/magedu，而后su切換至此用戶，復制多個文件至家目錄；
[root@localhost?~]#?useradd?-d?/users/magedu?magedu
[root@localhost?~]#?su?magedu
[magedu@localhost?root]$?cp?/etc/fstab?/users/magedu/
[magedu@localhost?root]$?cp?-r?/tmp/yicx100?/users/magedu/
[magedu@localhost?root]$?cp?-r?/tmp/yicx200?/users/magedu/
[magedu@localhost?root]$?ls?/users/magedu/
fstab??yicx100??yicx200
15、擴展mylv1至9G，確保擴展完成后原有數據完全可用；
[root@localhost?~]#?lvextend?-L?+4G?/dev/myvg1/mylv1?/dev/sdb{1,2}
Size?of?logical?volume?myvg1/mylv1?changed?from?5.00?GiB?(640?extents)?to?9.00?GiB?(1152?extents).
Logical?volume?mylv1?successfully?resized.
[root@localhost?~]#?lvs
LV????VG????Attr???????LSize?Pool?Origin?Data%??Meta%??Move?Log?Cpy%Sync?Convert
mylv1?myvg1?-wi-ao----?9.00g
[root@localhost?~]#?resize2fs?/dev/myvg1/mylv1
resize2fs?1.42.9?(28-Dec-2013)
Filesystem?at?/dev/myvg1/mylv1?is?mounted?on?/users;?on-line?resizing?required
old_desc_blocks?=?1,?new_desc_blocks?=?2
The?filesystem?on?/dev/myvg1/mylv1?is?now?2359296?blocks?long.
[root@localhost?~]#?df?-h
文件系統?????????????????容量??已用??可用?已用%?掛載點
/dev/sda3?????????????????38G??3.4G???35G???10%?/
devtmpfs?????????????????899M?????0??899M????0%?/dev
tmpfs????????????????????913M???88K??913M????1%?/dev/shm
tmpfs????????????????????913M??9.0M??904M????1%?/run
tmpfs????????????????????913M?????0??913M????0%?/sys/fs/cgroup
/dev/sda1????????????????497M??156M??342M???32%?/boot
tmpfs????????????????????183M???16K??183M????1%?/run/user/0
/dev/mapper/myvg1-mylv1??8.8G???23M??8.3G????1%?/users
[root@localhost?~]#?ls?/users/magedu/
fstab??yicx100??yicx200
[root@localhost?~]#?su?magedu
[magedu@localhost?root]$?cd
[magedu@localhost?~]$?pwd
/users/magedu
16、縮減mylv1至7G，確保縮減完成后原有數據完全可用；
[root@localhost?~]#?umount?/users/
[root@localhost?~]#?e2fsck?-f?/dev/myvg1/mylv1
e2fsck?1.42.9?(28-Dec-2013)
第一步:?檢查inode,塊,和大小
第二步:?檢查目錄結構
第3步:?檢查目錄連接性
Pass?4:?Checking?reference?counts
第5步:?檢查簇概要信息
/dev/myvg1/mylv1:?27/589824?files?(0.0%?non-contiguous),?75567/2359296?blocks
[root@localhost?~]#?resize2fs?/dev/myvg1/mylv1?7G
resize2fs?1.42.9?(28-Dec-2013)
Resizing?the?filesystem?on?/dev/myvg1/mylv1?to?1835008?(4k)?blocks.
The?filesystem?on?/dev/myvg1/mylv1?is?now?1835008?blocks?long.
[root@localhost?~]#?lvreduce?-L?7G?-n?/dev/myvg1/mylv1
WARNING:?Reducing?active?logical?volume?to?7.00?GiB
THIS?MAY?DESTROY?YOUR?DATA?(filesystem?etc.)
Do?you?really?want?to?reduce?mylv1??[y/n]:?y
Size?of?logical?volume?myvg1/mylv1?changed?from?9.00?GiB?(1152?extents)?to?7.00?GiB?(896?extents).
Logical?volume?mylv1?successfully?resized.
[root@localhost?~]#?mount?-a
[root@localhost?~]#?su?magedu
[magedu@localhost?root]$?cd
[magedu@localhost?~]$?pwd
/users/magedu
17、對mylv1創建快照，并通過備份數據；要求保留原有的屬主屬組等信息；
[root@localhost?magedu]#?lvcreate?-L?3G?-p?r?-s?-n?mylv1_bak?/dev/myvg1/mylv1
Logical?volume?"mylv1_bak"?created.
總結
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