topic：【原创】假设在有最后一次全库备份之后，你误删除了一张表，请使用备份+归档来将数据库恢复到删除表之前的状态。(不完全恢复)更多精彩内容尽在www.leonar
topic：【原创】假设在有最后一次全库备份之后，你误删除了一张表，请使用备份+归档来将数据库恢复到删除表之前的状态。(不完全恢复)
更多精彩内容尽在
进入Rman做全库备份
[oracle@leonarding1backup]$ rman target /
Recovery Manager:Release 11.2.0.1.0 - Production on Tue Apr 30 11:08:29 2013
Copyright (c)1982, 2009, Oracle and/or its affiliates. All rights reserved.
connected totarget database: LEO1 (DBID=1692458681)
RMAN> backupfull database format
'/u02/app/oracle/backup/full_bk1_%u%p%s.rmn'include current controlfile
plus
archivelog format'/u02/app/oracle/backup/arch_bk1_%u%p%s.rmn' delete all input;
2> 3> 4>
Starting backup at30-APR-13
current logarchived
using targetdatabase control file instead of recovery catalog
allocated channel:ORA_DISK_1
channelORA_DISK_1: SID=22 device type=DISK
RMAN-00571:===========================================================
RMAN-00569:=============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571:===========================================================
RMAN-03002:failure of backup plus archivelog command at 04/30/2013 11:13:27
RMAN-06059:expected archived log not found, loss of archived log compromisesrecoverability
ORA-19625: erroridentifying file /u02/app/oracle/archdata/1_75_813654649.dbf
ORA-27037: unableto obtain file status
Linux-x86_64Error: 2: No such file or directory
Additionalinformation: 3
75号归档日志缺失，Rman在操作系统上找不到对应的日志文件
当手工删除了归档日志以后，Rman备份会检测到日志缺失，从而无法进一步继续执行。
所以此时需要手工执行crosscheck过程，之后Rman备份可以恢复正常
RMAN> crosscheckarchivelog all; 交叉检查，有3个日志被手工删除
released channel:ORA_DISK_1
allocated channel:ORA_DISK_1
channelORA_DISK_1: SID=22 device type=DISK
validation failedfor archived log
archivedlog file name=/u02/app/oracle/archdata/1_75_813654649.dbf RECID=9STAMP=813790708
validation failedfor archived log
archivedlog file name=/u02/app/oracle/archdata/1_76_813654649.dbf RECID=7STAMP=813790702
validation failedfor archived log
archivedlog file name=/u02/app/oracle/archdata/1_77_813654649.dbf RECID=8STAMP=813790706
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_1_813790699.dbf RECID=10 STAMP=813791152
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_2_813790699.dbf RECID=11 STAMP=813913400
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_3_813790699.dbf RECID=12 STAMP=813913401
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_4_813790699.dbf RECID=13 STAMP=813913405
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_5_813790699.dbf RECID=14 STAMP=813933703
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_6_813790699.dbf RECID=15 STAMP=813933734
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_7_813790699.dbf RECID=16 STAMP=814090435
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_8_813790699.dbf RECID=17 STAMP=814090645
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_9_813790699.dbf RECID=18 STAMP=814090877
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_10_813790699.dbf RECID=19 STAMP=814091008
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_11_813790699.dbf RECID=20 STAMP=814091028
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_12_813790699.dbf RECID=21 STAMP=814091032
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_13_813790699.dbf RECID=22 STAMP=814091036
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_14_813790699.dbf RECID=23 STAMP=814091057
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_15_813790699.dbf RECID=24 STAMP=814091184
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_16_813790699.dbf RECID=25 STAMP=814091638
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_17_813790699.dbf RECID=26 STAMP=814091658
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_18_813790699.dbf RECID=27 STAMP=814091709
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_19_813790699.dbf RECID=28 STAMP=814092394
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_20_813790699.dbf RECID=29 STAMP=814092405
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_1_814098124.dbf RECID=30 STAMP=814098353
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_2_814098124.dbf RECID=31 STAMP=814100979
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_3_814098124.dbf RECID=32 STAMP=814101206
validationsucceeded for archived log
archived log filename=/u02/app/oracle/archdata/1_4_814098124.dbf RECID=33 STAMP=814101824
Crosschecked 27objects
RMAN> deleteexpired archivelog all; 删除所有过期归档日志
released channel:ORA_DISK_1
allocated channel:ORA_DISK_1
channelORA_DISK_1: SID=22 device type=DISK
List of ArchivedLog Copies for database with db_unique_name LEO1
=====================================================================
Key Thrd Seq S Low Time
------- ----------- - ---------
9 1 75 X 26-APR-13
Name: /u02/app/oracle/archdata/1_75_813654649.dbf
7 1 76 X 26-APR-13
Name: /u02/app/oracle/archdata/1_76_813654649.dbf
8 1 77 X 26-APR-13
Name: /u02/app/oracle/archdata/1_77_813654649.dbf
Do you really wantto delete the above objects (enter YES or NO)? y 75 76 77号日志被删除
deleted archivedlog
archived log filename=/u02/app/oracle/archdata/1_75_813654649.dbf RECID=9 STAMP=813790708
deleted archivedlog
archived log filename=/u02/app/oracle/archdata/1_76_813654649.dbf RECID=7 STAMP=813790702
deleted archivedlog
archived log filename=/u02/app/oracle/archdata/1_77_813654649.dbf RECID=8 STAMP=813790706
Deleted 3 EXPIREDobjects
RMAN> backup fulldatabase format 现在Rman备份可以恢复正常，同时删除备份过的归档日志
'/u02/app/oracle/backup/full_bk1_%u%p%s.rmn'include current controlfile
plus
archivelog format'/u02/app/oracle/backup/arch_bk1_%u%p%s.rmn' delete all input;2> 3> 4>
Starting backup at30-APR-13
current logarchived
using channelORA_DISK_1
channelORA_DISK_1: starting archived log backup set
channelORA_DISK_1: specifying archived log(s) in backup set
input archived logthread=1 sequence=1 RECID=10 STAMP=813791152
input archived logthread=1 sequence=2 RECID=11 STAMP=813913400
input archived logthread=1 sequence=3 RECID=12 STAMP=813913401
input archived logthread=1 sequence=4 RECID=13 STAMP=813913405
input archived logthread=1 sequence=5 RECID=14 STAMP=813933703
input archived logthread=1 sequence=6 RECID=15 STAMP=813933734
input archived logthread=1 sequence=7 RECID=16 STAMP=814090435
input archived logthread=1 sequence=8 RECID=17 STAMP=814090645
input archived logthread=1 sequence=9 RECID=18 STAMP=814090877
input archived logthread=1 sequence=10 RECID=19 STAMP=814091008
input archived logthread=1 sequence=11 RECID=20 STAMP=814091028
input archived logthread=1 sequence=12 RECID=21 STAMP=814091032
input archived logthread=1 sequence=13 RECID=22 STAMP=814091036
input archived logthread=1 sequence=14 RECID=23 STAMP=814091057
input archived logthread=1 sequence=15 RECID=24 STAMP=814091184
input archived logthread=1 sequence=16 RECID=25 STAMP=814091638
input archived logthread=1 sequence=17 RECID=26 STAMP=814091658
input archived logthread=1 sequence=18 RECID=27 STAMP=814091709
input archived logthread=1 sequence=19 RECID=28 STAMP=814092394
channelORA_DISK_1: starting piece 1 at 30-APR-13
channelORA_DISK_1: finished piece 1 at 30-APR-13
piecehandle=/u02/app/oracle/backup/arch_bk1_0co8cds4112.rmn tag=TAG20130430T113324comment=NONE
channelORA_DISK_1: backup set complete, elapsed time: 00:00:07
channelORA_DISK_1: deleting archived log(s)
archived log filename=/u02/app/oracle/archdata/1_1_813790699.dbf RECID=10 STAMP=813791152
archived log filename=/u02/app/oracle/archdata/1_2_813790699.dbf RECID=11 STAMP=813913400
archived log filename=/u02/app/oracle/archdata/1_3_813790699.dbf RECID=12 STAMP=813913401
archived log filename=/u02/app/oracle/archdata/1_4_813790699.dbf RECID=13 STAMP=813913405
archived log filename=/u02/app/oracle/archdata/1_5_813790699.dbf RECID=14 STAMP=813933703
archived log filename=/u02/app/oracle/archdata/1_6_813790699.dbf RECID=15 STAMP=813933734
archived log filename=/u02/app/oracle/archdata/1_7_813790699.dbf RECID=16 STAMP=814090435
archived log filename=/u02/app/oracle/archdata/1_8_813790699.dbf RECID=17 STAMP=814090645
archived log filename=/u02/app/oracle/archdata/1_9_813790699.dbf RECID=18 STAMP=814090877
archived log filename=/u02/app/oracle/archdata/1_10_813790699.dbf RECID=19 STAMP=814091008
archived log filename=/u02/app/oracle/archdata/1_11_813790699.dbf RECID=20 STAMP=814091028
archived log filename=/u02/app/oracle/archdata/1_12_813790699.dbf RECID=21 STAMP=814091032
archived log filename=/u02/app/oracle/archdata/1_13_813790699.dbf RECID=22 STAMP=814091036
archived log filename=/u02/app/oracle/archdata/1_14_813790699.dbf RECID=23 STAMP=814091057
archived log filename=/u02/app/oracle/archdata/1_15_813790699.dbf RECID=24 STAMP=814091184
archived log filename=/u02/app/oracle/archdata/1_16_813790699.dbf RECID=25 STAMP=814091638
archived log filename=/u02/app/oracle/archdata/1_17_813790699.dbf RECID=26 STAMP=814091658
archived log filename=/u02/app/oracle/archdata/1_18_813790699.dbf RECID=27 STAMP=814091709
archived log filename=/u02/app/oracle/archdata/1_19_813790699.dbf RECID=28 STAMP=814092394
channelORA_DISK_1: starting archived log backup set
channelORA_DISK_1: specifying archived log(s) in backup set
input archived logthread=1 sequence=1 RECID=30 STAMP=814098353
channelORA_DISK_1: starting piece 1 at 30-APR-13
channelORA_DISK_1: finished piece 1 at 30-APR-13
piecehandle=/u02/app/oracle/backup/arch_bk1_0do8cdsc113.rmn tag=TAG20130430T113324comment=NONE
channelORA_DISK_1: backup set complete, elapsed time: 00:00:01
channelORA_DISK_1: deleting archived log(s)
archived log filename=/u02/app/oracle/archdata/1_1_814098124.dbf RECID=30 STAMP=814098353
channelORA_DISK_1: starting archived log backup set
channelORA_DISK_1: specifying archived log(s) in backup set
input archived logthread=1 sequence=20 RECID=29 STAMP=814092405
channelORA_DISK_1: starting piece 1 at 30-APR-13
channelORA_DISK_1: finished piece 1 at 30-APR-13
piecehandle=/u02/app/oracle/backup/arch_bk1_0eo8cdsd114.rmn tag=TAG20130430T113324comment=NONE
channelORA_DISK_1: backup set complete, elapsed time: 00:00:01
channelORA_DISK_1: deleting archived log(s)
archived log filename=/u02/app/oracle/archdata/1_20_813790699.dbf RECID=29 STAMP=814092405
channelORA_DISK_1: starting archived log backup set
channelORA_DISK_1: specifying archived log(s) in backup set
input archived logthread=1 sequence=2 RECID=31 STAMP=814100979
input archived logthread=1 sequence=3 RECID=32 STAMP=814101206
input archived logthread=1 sequence=4 RECID=33 STAMP=814101824
input archived logthread=1 sequence=5 RECID=34 STAMP=814102404
channelORA_DISK_1: starting piece 1 at 30-APR-13
channelORA_DISK_1: finished piece 1 at 30-APR-13
piecehandle=/u02/app/oracle/backup/arch_bk1_0fo8cdse115.rmn tag=TAG20130430T113324comment=NONE
channelORA_DISK_1: backup set complete, elapsed time: 00:00:01
channelORA_DISK_1: deleting archived log(s)
archived log filename=/u02/app/oracle/archdata/1_2_814098124.dbf RECID=31 STAMP=814100979
archived log filename=/u02/app/oracle/archdata/1_3_814098124.dbf RECID=32 STAMP=814101206
archived log filename=/u02/app/oracle/archdata/1_4_814098124.dbf RECID=33 STAMP=814101824
archived log filename=/u02/app/oracle/archdata/1_5_814098124.dbf RECID=34 STAMP=814102404
Finished backup at30-APR-13
Starting backup at30-APR-13
using channelORA_DISK_1
channelORA_DISK_1: starting full datafile backup set
channelORA_DISK_1: specifying datafile(s) in backup set
input datafilefile number=00001 name=/u02/app/oracle/oradata/LEO1/system01.dbf
input datafilefile number=00002 name=/u02/app/oracle/oradata/LEO1/sysaux01.dbf
input datafilefile number=00003 name=/u02/app/oracle/oradata/LEO1/undotbs01.dbf
input datafile filenumber=00005 name=/u02/app/oracle/oradata/LEO1/leo1.dbf
input datafilefile number=00004 name=/u02/app/oracle/oradata/LEO1/users01.dbf
channelORA_DISK_1: starting piece 1 at 30-APR-13
channelORA_DISK_1: finished piece 1 at 30-APR-13
piece handle=/u02/app/oracle/backup/full_bk1_0go8cdsg116.rmntag=TAG20130430T113336 comment=NONE
channelORA_DISK_1: backup set complete, elapsed time: 00:01:25
channelORA_DISK_1: starting full datafile backup set
channelORA_DISK_1: specifying datafile(s) in backup set
including currentcontrol file in backup set
channelORA_DISK_1: starting piece 1 at 30-APR-13
channelORA_DISK_1: finished piece 1 at 30-APR-13
piecehandle=/u02/app/oracle/backup/full_bk1_0ho8cdv5117.rmn tag=TAG20130430T113336comment=NONE
channel ORA_DISK_1:backup set complete, elapsed time: 00:00:01
Finished backup at30-APR-13
Starting backup at30-APR-13
current logarchived
using channelORA_DISK_1
channelORA_DISK_1: starting archived log backup set
channelORA_DISK_1: specifying archived log(s) in backup set
input archived logthread=1 sequence=6 RECID=35 STAMP=814102503
channelORA_DISK_1: starting piece 1 at 30-APR-13
channelORA_DISK_1: finished piece 1 at 30-APR-13
piecehandle=/u02/app/oracle/backup/arch_bk1_0io8cdv7118.rmn tag=TAG20130430T113503comment=NONE
channelORA_DISK_1: backup set complete, elapsed time: 00:00:01
channelORA_DISK_1: deleting archived log(s)
archived log filename=/u02/app/oracle/archdata/1_6_814098124.dbf RECID=35 STAMP=814102503
Finished backup at30-APR-13
Starting ControlFile and SPFILE Autobackup at 30-APR-13
piecehandle=/u02/app/oracle/backup/control/cf_c-1692458681-20130430-01 comment=NONE
Finished ControlFile and SPFILE Autobackup at 30-APR-13
我们现在进入数据库创建一个表leo1并插入三条记录
SYS@LEO1>createtable leo1 (name varchar2(20),age number,riqi date);
Table created.
SYS@LEO1>insertinto leo1 values('leonarding',28,sysdate);
1 row created.
SYS@LEO1>insertinto leo1 values('sun_vn',26,sysdate);
1 row created.
SYS@LEO1>insertinto leo1 values('tiger',18,sysdate);
1 row created.
SYS@LEO1>commit;
Commit complete.
SYS@LEO1>select* from leo1; 完成
NAME AGE RIQI
------------------------------ ---------
leonarding 28 30-APR-13
sun_vn 26 30-APR-13
tiger 18 30-APR-13
SYS@LEO1>selectgroup#,members,bytes,archived,sequence#,status from v$log;
GROUP# MEMBERS BYTES ARC SEQUENCE# STATUS
-------------------- ---------- --- ---------- ----------------
1 2 52428800 NO 7 CURRENT
2 2 52428800 YES 5 INACTIVE
5 2 52428800 YES 6 INACTIVE
我们创建表和插入信息是写入当前日志组1
SYS@LEO1>altersystem switch logfile; 切换日志组
System altered.
SYS@LEO1>altersystem switch logfile;
System altered.
SYS@LEO1>selectgroup#,members,bytes,archived,sequence#,status from v$log;
GROUP# MEMBERS BYTES ARC SEQUENCE# STATUS
-------------------- ---------- --- ---------- ----------------
1 2 52428800 YES 7 INACTIVE
2 2 52428800 YES 8 INACTIVE
5 2 52428800 NO 9 CURRENT
现在组1已经完成归档，如果我们此时勿删除了leo1表，我们可以把数据库恢复到7号归档日志的那一点，网站空间，就可以恢复勿删除的leo1表了。我们顺便把当前redolog日志也损坏了，看看可不可以扶起数据库来。
SYS@LEO1>droptable leo1 purge; 删除表
我们删除第五组的2个成员
[oracle@leonarding1LEO1]$ rm -rf redo05.log
[oracle@leonarding1LEO1]$ cd disk2/
[oracle@leonarding1disk2]$ rm -rf redo05_b.log
SYS@LEO1>startup
ORACLE instancestarted.
Total SystemGlobal Area 471830528 bytes
Fixed Size 2214456 bytes
Variable Size 171967944 bytes
DatabaseBuffers 289406976 bytes
Redo Buffers 8241152 bytes
Database mounted.
ORA-00313: openfailed for members of log group 5 of thread 1
ORA-00312: onlinelog 5 thread 1:
'/u02/app/oracle/oradata/LEO1/disk2/redo05_b.log'
ORA-27037: unableto obtain file status
Linux-x86_64Error: 2: No such file or directory
Additionalinformation: 3
ORA-00312: onlinelog 5 thread 1: '/u02/app/oracle/oradata/LEO1/redo05.log'
ORA-27037: unableto obtain file status
Linux-x86_64Error: 2: No such file or directory
Additionalinformation: 3
找不到第五组redo，实际上已经被我们删除了，进入rman进行恢复操作
[oracle@leonarding1backup]$ rman target /
Recovery Manager:Release 11.2.0.1.0 - Production on Tue Apr 30 12:47:55 2013
Copyright (c)1982, 2009, Oracle and/or its affiliates. All rights reserved.
connected totarget database: LEO1 (DBID=1692458681, not open)
RMAN> restoredatabase;
Starting restoreat 30-APR-13
using targetdatabase control file instead of recovery catalog
allocated channel:ORA_DISK_1
channelORA_DISK_1: SID=133 device type=DISK
channelORA_DISK_1: starting datafile backup set restore
channelORA_DISK_1: specifying datafile(s) to restore from backup set
channelORA_DISK_1: restoring datafile 00001 to/u02/app/oracle/oradata/LEO1/system01.dbf
channelORA_DISK_1: restoring datafile 00002 to/u02/app/oracle/oradata/LEO1/sysaux01.dbf
channelORA_DISK_1: restoring datafile 00003 to /u02/app/oracle/oradata/LEO1/undotbs01.dbf
channelORA_DISK_1: restoring datafile 00004 to/u02/app/oracle/oradata/LEO1/users01.dbf
channelORA_DISK_1: restoring datafile 00005 to /u02/app/oracle/oradata/LEO1/leo1.dbf
channelORA_DISK_1: reading from backup piece /u02/app/oracle/backup/full_bk1_0go8cdsg116.rmn
channelORA_DISK_1: piece handle=/u02/app/oracle/backup/full_bk1_0go8cdsg116.rmntag=TAG20130430T113336
channelORA_DISK_1: restored backup piece 1
channelORA_DISK_1: restore complete, elapsed time: 00:02:05
Finished restoreat 30-APR-13
我们只需恢复到7号归档日志状态点，就可以找回我们删除了的leo1表
RMAN> recoverdatabase until sequence 7 thread 1;
Starting recoverat 30-APR-13
using channelORA_DISK_1
starting mediarecovery
channelORA_DISK_1: starting archived log restore to default destination
channel ORA_DISK_1:restoring archived log
archived logthread=1 sequence=6
channelORA_DISK_1: reading from backup piece/u02/app/oracle/backup/arch_bk1_0io8cdv7118.rmn
channelORA_DISK_1: piece handle=/u02/app/oracle/backup/arch_bk1_0io8cdv7118.rmntag=TAG20130430T113503
channelORA_DISK_1: restored backup piece 1
channelORA_DISK_1: restore complete, elapsed time: 00:00:01
archived log filename=/u02/app/oracle/archdata/1_6_814098124.dbf thread=1 sequence=6
media recoverycomplete, elapsed time: 00:00:01
Finished recoverat 30-APR-13
SYS@LEO1>alterdatabase open resetlogs;
Database altered.
resetlogs做的几件事：
1）数据文件头scn号为准，同步控制文件和在线日志文件scn号
2）重新创建redolog日志（创建一个空日志），重置为unused
3）重置归档日志序号从1开始编码
4）让数据库重新进入一个新的生命周期
SYS@LEO1>select* from leo1;
NAME AGE RIQI
------------------------------ ---------
leonarding 28 30-APR-13
sun_vn 26 30-APR-13
tiger 18 30-APR-13
这个表存在说明应用了 sequence为7的归档
小结：到此我们的系列恢复实验完美完成，里面阐述了各种不同环境下的恢复测试，简明了重做日志和归档日志关系，在什么情况下可以恢复到什么级别，虚拟主机，牢实掌握如上信息，可以让你遇事不慌张事半功倍。
控制文件恢复，重做日志恢复，完全恢复，不完全恢复，备份
Leonarding
2013.4.30
天津&spring
分享技术~成就梦想
Blog：
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如何在 Windows 11 中备份和恢复任务栏上的固定项目Apr 18, 2023 pm 11:16 PMWindows系统上的任务栏是全球所有Windows用户最常用的功能。您可以轻松地将您最喜欢和最常用的应用程序固定在任务栏中，自定义其大小和颜色。在本文中，我们将讨论如何备份任务栏上的固定项目以及如何根据需要恢复它们。如何在Windows11中备份和恢复任务栏上的固定项目有两种方法可以备份和恢复固定的项目。有一种手动方法，您必须在安全文件夹中创建固定项目的备份及其关联的注册表文件。除此之外，还有另一种自动方法可用于自动化备份固定项目的整个过程。手动备份这个过程有两个不同的部分。第1步-
如何在麒麟操作系统上进行系统备份和恢复？Aug 07, 2023 pm 02:22 PM如何在麒麟操作系统上进行系统备份和恢复？麒麟操作系统是中国自主研发的开源操作系统，广泛应用于各种场景中。在使用麒麟操作系统时，系统备份和恢复是非常重要的一项任务。备份系统可以防止因故障或误操作导致数据丢失，而系统恢复则可以在系统崩溃时快速恢复正常功能。本文将详细介绍如何在麒麟操作系统上进行系统备份和恢复，并附上相关代码示例。备份系统为了备份整个系统，我们可以
win11改win10系统教程的详细介绍Jul 08, 2023 pm 09:21 PM微软6月24号正式公布了win11系统，可以看到用户界面、开始菜单等和Windows10X中发现的非常相似。有的朋友在使用预览版的时候发现用的不习惯，想要改win10系统开使用，那么我们要如何操作呢，下面我们就来看看win11改win10系统教程，一起来学习一下吧。1、第一步是从Windows11打开新设置。在这里，您需要转到图像中显示的系统设置。2、在系统设置下，选择“恢复”选项。在这里，您将能够看到“以前版本的窗口”选项。您还可以在它旁边看到一个“返回”按钮，单击此按钮。3、您可以指定要返回
Linux系统中的数据备份和恢复方法Jun 18, 2023 pm 11:40 PM随着互联网技术和大数据时代的到来，越来越多的企业开始依赖于数据来决策和推动业务发展。而数据备份和恢复作为数据管理的重要环节，其重要性不言而喻。在Linux系统中，数据备份和恢复也是必不可少的。下面将详细介绍Linux系统中的数据备份和恢复方法。一、备份tar命令tar命令是Linux系统中最基本的备份命令，可以将文件或目录打包成一个文件。它的基本语法如下：t
如何在麒麟操作系统上进行系统的备份和还原？Aug 06, 2023 am 11:37 AM如何在麒麟操作系统上进行系统的备份和还原？麒麟操作系统是一款基于Linux的开源操作系统，因其稳定性和安全性而受到广泛关注和应用。在日常使用中，系统备份和还原是非常重要的操作，可以保护系统数据免受意外损坏或丢失。下面将介绍在麒麟操作系统上如何进行系统备份和还原的方法。一、系统备份在麒麟操作系统中，系统备份可以使用rsync命令来完成。rsync是一款用于数据
MySQL和Oracle：对于备份和恢复的速度和可靠性比较Jul 12, 2023 am 10:16 AMMySQL和Oracle：对于备份和恢复的速度和可靠性比较导言：MySQL和Oracle是两个常见的关系型数据库管理系统（RDBMS），它们在数据备份和恢复方面有着不同的机制和性能表现。本文将重点比较MySQL和Oracle在备份和恢复方面的速度和可靠性，并附上一些代码示例，以便更好地理解它们之间的差异和优劣势。备份性能比较：在备份方面，MySQL和Orac
如何在麒麟操作系统上进行文件管理和备份？Aug 04, 2023 pm 06:25 PM如何在麒麟操作系统上进行文件管理和备份？麒麟操作系统是一款基于Linux的操作系统，广泛应用于中国政府和教育领域。在麒麟操作系统上进行文件管理和备份是一项重要的任务，它能够帮助我们更好地管理和维护重要的文件和数据。本文将为您介绍如何在麒麟操作系统上进行文件管理和备份，并附带代码示例。一、文件管理创建文件夹：在麒麟操作系统中，我们可以使用mkdir命令来创建文
win7如何备份系统和恢复系统的数据Jun 29, 2023 pm 02:01 PMwin7如何备份系统和恢复系统的数据？很多小伙伴在使用电脑的时候，又遇到过不得不重装系统的情况，这个时候系统中的数据也会随之丢失，其实我们在重装系统前备份系统数数据，就可以在重装之后恢复系统的数据了，下面就由小编为大家带来win7备份系统和恢复系统方法。win7备份系统和恢复系统方法一、备份win7系统1、首先点击开始菜单，打开控制面板。2、在【系统和安全】选项里，点击【备份您的计算机】。3、点击左上角的【创建系统映像】。4、下拉框里，选择要备份的位置，比如D盘，点击【下一步】。5、确认备份设置
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