转载请注明出处:http://blog.csdn.net/guoyjoe/article/details/31018075 @@@@@@@利用BBED模拟损坏5文件1号块(文件头) BBED copy file 4 block 4 to file 5 block 1 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 0 to 19 Dba:0x01
转载请注明出处:http://blog.csdn.net/guoyjoe/article/details/31018075
@@@@@@@利用BBED模拟损坏5文件1号块(文件头)
BBED> copy file 4 block 4 to file 5 block 1 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 0 to 19 Dba:0x01400001 ------------------------------------------------------------------------ 1ea20000 04000001 1a4b0000 00000104 99810000 <32 bytes per line> sys@PROD> shutdown abort; ORACLE instance shut down. sys@PROD> starup SP2-0042: unknown command "starup" - rest of line ignored. sys@PROD> startup ORACLE instance started. Total System Global Area 939495424 bytes Fixed Size 2233960 bytes Variable Size 251660696 bytes Database Buffers 679477248 bytes Redo Buffers 6123520 bytes Database mounted. ORA-01122: database file 5 failed verification check ORA-01110: data file 5: '/u01/app/oracle/oradata/PROD/tp01.dbf' ORA-01210: data file header is media corrupt
BBED开始恢复
1、找个文件头覆盖
<strong>BBED> copy file 4 block 1 to file 5 block 1 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 0 to 19 Dba:0x01400001 ------------------------------------------------------------------------ 0ba20000 01000001 00000000 00000104 edbc0000 <32 bytes per line> </strong>2、进入5文件1号块
BBED> set file 5 block 1 FILE# 5 BLOCK# 1
(1)改块的地址5文件1号块,rdba_kcbh
BBED> p kcvfhbfh struct kcvfhbfh, 20 bytes @0 ub1 type_kcbh @0 0x0b ub1 frmt_kcbh @1 0xa2 ub1 spare1_kcbh @2 0x00 ub1 spare2_kcbh @3 0x00 ub4 rdba_kcbh @4 0x01000001 ub4 bas_kcbh @8 0x00000000 ub2 wrp_kcbh @12 0x0000 ub1 seq_kcbh @14 0x01 ub1 flg_kcbh @15 0x04 (KCBHFCKV) ub2 chkval_kcbh @16 0xbced ub2 spare3_kcbh @18 0x0000
BBED> d /v offset 4 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 4 to 23 Dba:0x01400001 ------------------------------------------------------- 01000001 00000000 00000104 edbc0000 l ............í?.. 00000000 BBED> m /x 01004001 offset 4 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 4 to 23 Dba:0x01400001 ------------------------------------------------------------------------ 01004001 00000000 00000104 edbc0000 00000000
(2)文件的大小kccfhfsz
BBED> p kcvfhhdr struct kcvfhhdr, 76 bytes @20 ub4 kccfhswv @20 0x00000000 ub4 kccfhcvn @24 0x0b200000 ub4 kccfhdbi @28 0x0f302c3e text kccfhdbn[0] @32 P text kccfhdbn[1] @33 R text kccfhdbn[2] @34 O text kccfhdbn[3] @35 D text kccfhdbn[4] @36 text kccfhdbn[5] @37 text kccfhdbn[6] @38 text kccfhdbn[7] @39 ub4 kccfhcsq @40 0x00000d3d ub4 kccfhfsz @44 0x00003200 s_blkz kccfhbsz @48 0x00 ub2 kccfhfno @52 0x0004 ub2 kccfhtyp @54 0x0003 ub4 kccfhacid @56 0x00000000 ub4 kccfhcks @60 0x00000000 text kccfhtag[0] @64 .................... sys@PROD> select name from v$dbfile where file#=5; NAME -------------------------------------------------- /u01/app/oracle/oradata/PROD/tp01.dbf [oracle@jfdb PROD]$ ls -lFtr |grep tp01 -rw-r-----. 1 oracle oinstall 524296192 Jun 8 18:58 tp01.dbf sys@PROD> select 524296192/8192 from dual; 524296192/8192 -------------- 64001
BBED> d /v offset 44 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 44 to 63 Dba:0x01400001 ------------------------------------------------------- 00320000 00200000 04000300 00000000 l .2... .......... 00000000 BBED> m /x 00fa0000 44 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 44 to 63 Dba:0x01400001 ------------------------------------------------------------------------ 00fa0000 00200000 04000300 00000000 00000000
(3)修改文件号(4--->5)
ub2 kccfhfno @52 0x0004
BBED> d /v offset 52 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 52 to 71 Dba:0x01400001 ------------------------------------------------------- 04000300 00000000 00000000 00000000 l ................ 00000000 BBED> m /x 05 offset 52 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 52 to 71 Dba:0x01400001 ------------------------------------------------------------------------ 05000300 00000000 00000000 00000000 00000000
(4)修改文件创建时SCN
BBED> p kcvfhcrs struct kcvfhcrs, 8 bytes @100 ub4 kscnbas @100 0x00004b14 ub2 kscnwrp @104 0x0000 sys@PROD> select file#,CREATION_CHANGE# from v$datafile where file#=5; FILE# CREATION_CHANGE# ---------- ---------------- 5 363921 sys@PROD> select to_char('363921','xxxxxxxxxxxxx') from dual; TO_CHAR('36392 -------------- 58d91 ===(倒:918d0500)==》00058d91 BBED> d /v offset 100 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 100 to 119 Dba:0x01400001 ------------------------------------------------------- 144b0000 00000000 30cf3e32 a41da532 l .K......0?>2¤.¥2 ec4f1900 BBED> m /x 918d offset 100 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 100 to 119 Dba:0x01400001 ------------------------------------------------------------------------ 918d0000 00000000 30cf3e32 a41da532 ec4f1900 BBED> m /x 0500 offset 102 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 102 to 121 Dba:0x01400001 ------------------------------------------------------------------------ 05000000 000030cf 3e32a41d a532ec4f 19000000 BBED> d /v offset 100 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 100 to 119 Dba:0x01400001 ------------------------------------------------------- 918d0500 00000000 30cf3e32 a41da532 l ........0?>2¤.¥2 ec4f1900
(5)修改文件创建时间
ub4 kcvfhcrt @108 0x323ecf30 BBED> p kcvfhcrt ub4 kcvfhcrt @108 0x323ecf30 sys@PROD> select file#,to_char(CREATION_TIME,'yyyy-mm-dd hh24:mi:ss') createTime, 2 (to_char(CREATION_TIME,'yyyy')-1988)*12*31*24*3600+ 3 (to_char(CREATION_TIME,'mm')-1)*31*24*3600+ 4 (to_char(CREATION_TIME,'dd')-1)*24*3600+ 5 to_char(CREATION_TIME,'hh24')*3600+ 6 to_char(CREATION_TIME,'mi')*60+ 7 to_char(CREATION_TIME,'ss') createTimeSCN 8 from v$datafile WHERE file# in(4,5); FILE# CREATETIME CREATETIMESCN ---------- ------------------- ------------- 4 2014-03-23 16:17:52 842977072 5 2014-03-29 10:32:22 843474742 sys@PROD> select '4' file#, to_char('842977072','xxxxxxxxxxxxxx') from dual; F TO_CHAR('842977 - --------------- 4 323ecf30 ===>倒:30cf3e32 sys@PROD> select '5' file#,to_char('843474742','xxxxxxxxxxxxxx') from dual; sys@PROD> select '5' file#,to_char('843474742','xxxxxxxxxxxxxx') from dual; F TO_CHAR('843474 - --------------- 5 32466736 ==》36674632 BBED> d /v offset 108 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 108 to 127 Dba:0x01400001 ------------------------------------------------------- 30cf3e32 a41da532 ec4f1900 00000000 l 0?>2¤.¥2ìO...... d713a532 BBED> m /x 36674632 offset 108 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 108 to 127 Dba:0x01400001 ------------------------------------------------------------------------ 36674632 a41da532 ec4f1900 00000000 d713a532
sword kcvfhtsn @332 4 sys@PROD> select file#,TS# from v$datafile where file# in(4,5); FILE# TS# ---------- ---------- 4 4 5 5 BBED> d /v offset 332 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 332 to 351 Dba:0x01400001 ------------------------------------------------------- 04000000 05005553 45525300 00000000 l ......USERS..... 00000000 l .... <16 bytes per line> BBED> m /x 05 offset 332 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 332 to 351 Dba:0x01400001 ------------------------------------------------------------------------ 05000000 05005553 45525300 00000000 00000000
ub4 kcvfhrfn @368 0x00000004
BBED> d /v offset 368 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 368 to 387 Dba:0x01400001 ------------------------------------------------------- 04000000 00000000 00000000 00000000 l ................ 00000000 l .... <16 bytes per line> BBED> m /x 05 offset 368 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 368 to 387 Dba:0x01400001 ------------------------------------------------------------------------ 05000000 00000000 00000000 00000000 00000000
BBED> p kcvfhtnm text kcvfhtnm[0] @338 U text kcvfhtnm[1] @339 S text kcvfhtnm[2] @340 E text kcvfhtnm[3] @341 R text kcvfhtnm[4] @342 S text kcvfhtnm[5] @343 text kcvfhtnm[6] @344 text kcvfhtnm[7] @345 text kcvfhtnm[8] @346 text kcvfhtnm[9] @347 text kcvfhtnm[10] @348 text kcvfhtnm[11] @349 text kcvfhtnm[12] @350 sys@PROD> select file#,TS# from v$datafile where file# in(4,5); FILE# TS# ---------- ---------- 4 4 5 5 sys@PROD> select TS#,NAME from v$tablespace where ts# in(4,5); TS# NAME ---------- -------------------------------------------------- 4 USERS 5 TP1 BBED> d /v offset 338 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 338 to 357 Dba:0x01400001 ------------------------------------------------------- 55534552 53000000 00000000 00000000 l USERS........... 00000000 sys@PROD> select dump('USERS',16) from dual; DUMP('USERS',16) ---------------------------- Typ=96 Len=5: 55,53,45,52,53 sys@PROD> select dump('TP1',16) from dual; DUMP('TP1',16) ---------------------- Typ=96 Len=3: 54,50,31 BBED> m /x 54503100 offset 338 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 338 to 357 Dba:0x01400001 ------------------------------------------------------------------------ 54503100 53000000 00000000 00000000 00000000 <32 bytes per line> BBED> m /x 00 offset 342 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 342 to 361 Dba:0x01400001 ------------------------------------------------------------------------ 00000000 00000000 00000000 00000000 00000000 <32 bytes per line> BBED> d /v offset 338 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 338 to 357 Dba:0x01400001 ------------------------------------------------------- 54503100 00000000 00000000 00000000 l TP1............. 00000000
ub2 kcvfhtln @336 0x0005
BBED> d /v offset 336 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 336 to 355 Dba:0x01400001 ------------------------------------------------------- 05005450 31000000 00000000 00000000 l ..TP1........... 00000000 l .... <16 bytes per line> BBED> m /x 03 offset 336 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 336 to 355 Dba:0x01400001 ------------------------------------------------------------------------ 03005450 31000000 00000000 00000000 00000000 <32 bytes per line>
(10)检查点
BBED> p kcvfhckp struct kcvfhckp, 36 bytes @484 struct kcvcpscn, 8 bytes @484 ub4 kscnbas @484 0x0019b1a1 --->1683873 ub2 kscnwrp @488 0x0000 ub4 kcvcptim @492 0x32a59921 -->849713441 ub2 kcvcpthr @496 0x0001 union u, 12 bytes @500 struct kcvcprba, 12 bytes @500 ub4 kcrbaseq @500 0x00000002 ub4 kcrbabno @504 0x000002e0 ub2 kcrbabof @508 0x0010 ub1 kcvcpetb[0] @512 0x02 ub1 kcvcpetb[1] @513 0x00 ub1 kcvcpetb[2] @514 0x00 ub1 kcvcpetb[3] @515 0x00 ub1 kcvcpetb[4] @516 0x00 ub1 kcvcpetb[5] @517 0x00 ub1 kcvcpetb[6] @518 0x00 ub1 kcvcpetb[7] @519 0x00 sys@PROD> select file#,rfile#,CREATION_TIME,checkpoint_change#,unrecoverable_change#,offline_change# from v$datafile; FILE# RFILE# CREATION_ CHECKPOINT_CHANGE# UNRECOVERABLE_CHANGE# OFFLINE_CHANGE# ---------- ---------- --------- ------------------ --------------------- --------------- 1 1 23-MAR-14 1683873 0 1658859 2 2 23-MAR-14 1683873 0 1658859 3 3 23-MAR-14 1683873 0 1658859 4 4 23-MAR-14 1683873 0 1658859 5 5 29-MAR-14 1684251 0 1658859 sys@PROD> select to_number('19b1a1','xxxxxxxxxxxx') from dual; TO_NUMBER('19B1A1','XXXXXXXXXXXX') ---------------------------------- 1683873 sys@PROD> select to_number('32a59921','xxxxxxxxxxxx') from dual; TO_NUMBER('32A59921','XXXXXXXXXXXX') ------------------------------------ 849713441 sys@PROD> select file#,to_char(CHECKPOINT_TIME,'yyyy-mm-dd hh24:mi:ss') createTime, 2 (to_char(CHECKPOINT_TIME,'yyyy')-1988)*12*31*24*3600+ 3 (to_char(CHECKPOINT_TIME,'mm')-1)*31*24*3600+ 4 (to_char(CHECKPOINT_TIME,'dd')-1)*24*3600+ 5 to_char(CHECKPOINT_TIME,'hh24')*3600+ 6 to_char(CHECKPOINT_TIME,'mi')*60+ 7 to_char(CHECKPOINT_TIME,'ss') createTimeSCN 8 from v$datafile WHERE file# in(4,5); FILE# CREATETIME CREATETIMESCN ---------- ------------------- ------------- 4 2014-06-08 15:30:41 849713441 5 2014-06-08 15:38:33 849713913 sys@PROD> sys@PROD> select to_char('1684251','xxxxxxxxxxxxxxx') from dual; TO_CHAR('1684251 ---------------- 19b31b ====>真正5号文件的检查点SCN sys@PROD> select to_char('849713913','xxxxxxxxxxxxxxx') from dual; TO_CHAR('8497139 ---------------- 32a59af9 ====>真正5号文件的检查点时间 ub4 kscnbas @484 0x0019b1a1 ====>真正5号文件的检查点SCN 19b31b (倒:1bb319) ub4 kcvcptim @492 0x32a59921 ====>真正5号文件的检查点时间32a59af9(倒:f99aa532) BBED> d /v offset 484 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 484 to 503 Dba:0x01400001 ------------------------------------------------------- a1b11900 00000000 2199a532 01000000 l ?±......!.¥2.... 02000000 BBED> m /x 1bb319 offset 484 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 484 to 503 Dba:0x01400001 ------------------------------------------------------------------------ 1bb31900 00000000 2199a532 01000000 02000000 BBED> d /v offset 492 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 492 to 511 Dba:0x01400001 ------------------------------------------------------- 2199a532 01000000 02000000 e0020000 l !.¥2........à... 10007261 BBED> m /x f99a offset 492 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 492 to 511 Dba:0x01400001 ------------------------------------------------------------------------ f99aa532 01000000 02000000 e0020000 10007261
##################校验块
BBED> sum apply Check value for File 5, Block 1: current = 0x4a10, required = 0x4a10 BBED> verify DBVERIFY - Verification starting FILE = /u01/app/oracle/oradata/PROD/tp01.dbf BLOCK = 1 DBVERIFY - Verification complete Total Blocks Examined : 1 Total Blocks Processed (Data) : 0 Total Blocks Failing (Data) : 0 Total Blocks Processed (Index): 0 Total Blocks Failing (Index): 0 Total Blocks Empty : 0 Total Blocks Marked Corrupt : 0 Total Blocks Influx : 0 Message 531 not found; product=RDBMS; facility=BBED
######################检查物理坏块
[oracle@jfdb PROD]$ dbv file=tp01.dbf start=1 end=2 DBVERIFY: Release 11.2.0.3.0 - Production on Sun Jun 8 21:48:37 2014 Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved. DBVERIFY - Verification starting : FILE = /u01/app/oracle/oradata/PROD/tp01.dbf DBVERIFY - Verification complete Total Pages Examined : 2 Total Pages Processed (Data) : 0 Total Pages Failing (Data) : 0 Total Pages Processed (Index): 0 Total Pages Failing (Index): 0 Total Pages Processed (Other): 2 Total Pages Processed (Seg) : 0 Total Pages Failing (Seg) : 0 Total Pages Empty : 0 Total Pages Marked Corrupt : 0 Total Pages Influx : 0 Total Pages Encrypted : 0 Highest block SCN : 1687542 (0.1687542)
############打开数据库报错
sys@PROD> shutdown abort; ORACLE instance shut down. sys@PROD> startup ORACLE instance started. Total System Global Area 939495424 bytes Fixed Size 2233960 bytes Variable Size 251660696 bytes Database Buffers 679477248 bytes Redo Buffers 6123520 bytes Database mounted. ORA-01122: database file 5 failed verification check ORA-01110: data file 5: '/u01/app/oracle/oradata/PROD/tp01.dbf' ORA-01207: file is more recent than control file - old control file
###########怀疑检查点计数器,这里我先用BBED(方法1重建控制文件,方法2利用BBED修改计算器)
ub4 kcvfhcpc @140 0x00000102
idle> alter session set events 'immediate trace name controlf level 8'; Session altered. DATA FILE #5: name #4: /u01/app/oracle/oradata/PROD/tp01.dbf creation size=0 block size=8192 status=0xe head=4 tail=4 dup=1 tablespace 5, index=5 krfil=5 prev_file=0 unrecoverable scn: 0x0000.00000000 01/01/1988 00:00:00 Checkpoint cnt:226 scn: 0x0000.0019b31b 06/08/2014 15:38:33 Stop scn: 0xffff.ffffffff 06/08/2014 07:44:07 Creation Checkpointed at scn: 0x0000.00058d91 03/29/2014 10:32:22 thread:0 rba:(0x0.0.0) sys@PROD> select to_char('226','xxxxxxxxxxxxx') from dual; TO_CHAR('226', -------------- e2 sys@PROD> select to_char('225','xxxxxxxxxxxxx') from dual; TO_CHAR('225', -------------- e1 BBED> d /v offset 140 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 140 to 159 Dba:0x01400001 ------------------------------------------------------- 02010000 8bc6a532 01010000 b24f1900 l .....?¥2....2O.. 00000000 BBED> m /x e200 offset 140 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 140 to 159 Dba:0x01400001 ------------------------------------------------------------------------ e2000000 8bc6a532 01010000 b24f1900 00000000 <32 bytes per line> BBED> d /v offset 148 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 148 to 167 Dba:0x01400001 ------------------------------------------------------- 01010000 b24f1900 00000000 d713a532 l ....2O......×.¥2 01000000 l .... <16 bytes per line> BBED> m /x e100 offset 148 File: /u01/app/oracle/oradata/PROD/tp01.dbf (5) Block: 1 Offsets: 148 to 167 Dba:0x01400001 ------------------------------------------------------------------------ e1000000 b24f1900 00000000 d713a532 01000000 <32 bytes per line> BBED> sum apply Check value for File 5, Block 1: current = 0x4a10, required = 0x4a10 BBED> verify DBVERIFY - Verification starting FILE = /u01/app/oracle/oradata/PROD/tp01.dbf BLOCK = 1 DBVERIFY - Verification complete Total Blocks Examined : 1 Total Blocks Processed (Data) : 0 Total Blocks Failing (Data) : 0 Total Blocks Processed (Index): 0 Total Blocks Failing (Index): 0 Total Blocks Empty : 0 Total Blocks Marked Corrupt : 0 Total Blocks Influx : 0 Message 531 not found; product=RDBMS; facility=BBED
##########再次打开库,OK!
sys@PROD> select status from v$instance; STATUS ------------ MOUNTED sys@PROD> alter database open; Database altered.
###############################修改数据文件头的注意点:
1、修改数据的DBA,rdba_kcbh
2、修改文件的大小,kccfhfsz
3、修改文件号,kccfhfno
4、修改文件创建时SCN,kcvfhcrs
5、修改文件创建时间,kcvfhcrt
6、修改表空间号,kcvfhtsn
7、修改相对文件号,kcvfhrfn
8、修改表空间的名称, kcvfhtnm
9、修改表空间的长度,kcvfhtln
10、修改检查点的SCN,kcvfhckp
11、修改检查点的时间,kcvcptim
12、修改检查点的计数器,kcvfhcpc
13、修改检查点的控制文件备份的计数器, kcvfhccc
14、如果你修改是1号文件的1号块他的root rdba的地针是指向了bootstrap$

Steam会在您玩游戏时保存您的游戏进度并将其存储在Steam云中。当您在多台设备上玩Steam游戏时,此功能非常有用。只需在所有设备上使用您的Steam凭据登录,安装游戏即可!所有用户设置、游戏保存数据、您朋友的聊天框等等。修复1–检查游戏是否受支持所有Steam游戏均不支持Steam云存档功能。因此,您必须检查游戏是否真的支持此功能。1.在您的系统上打开Steam应用程序。2.现在,您必须使用您的凭据登录Steam。3.然后,输入您的用户名和密码,然后点击“登录

您的PC有时会遇到问题,导致难以正常启动。在这种情况下,您可以使用Windows11恢复USB恢复它。虽然这一切看起来简单明了,但您仍然需要知道如何创建和使用恢复USB。在本指南中,我们将引导您完成轻松执行此任务所需的步骤。我可以下载Windows11恢复USB吗?如果您的操作系统完全崩溃,您可以从另一台运行良好的PC下载Windows11恢复USB。但是,要从中创建恢复驱动器的电脑必须与你的电脑具有相同的体系结构。最好的选择仍然是在PC正常运行时从PC创建USB。这消除了任何兼容性风险。或者,

如何利用GitLab进行项目文档管理一、背景介绍在软件开发过程中,项目文档是非常重要的资料,不仅能够帮助开发团队了解项目的需求和设计,还能提供给测试团队和客户参考。为了方便项目文档的版本控制和团队协作,我们可以利用GitLab来进行项目文档管理。GitLab是一个基于Git的版本控制系统,除了支持代码管理,还可以管理项目文档。二、GitLab环境搭建首先,我

出厂设置恢复到出厂时的默认状态,删除所有的文件和软件。在手机上很多朋友都会设置出厂设置,那么你们知道电脑如何恢复出厂设置吗?下面小编就以win7为例和大家分享一下过程吧。1、首先打开下电脑,看到win7图标点开。2、接着我们打开下【控制面板】。3、然后我们找到【系统】点击并打开。4、在系统窗口中我们点击【系统保护】。5、接着我们选择【系统还原】选项。6、接着我们来到这个界面,点击下一步即可。7、选择还原点,一般都是默认的初始的状态。8、最后我们来到这个界面,点击完成就可以进入到还原过程。以上就是

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

抖音作为一个全球知名的短视频社交平台,靠着其独特的个性化推荐算法赢得了广大用户的青睐。本文将深入研究抖音视频推荐的价值和原理,帮助读者更好地了解和充分利用这一功能。一、什么是抖音推荐视频抖音推荐视频是根据用户的兴趣和行为习惯,利用智能推荐算法为用户筛选和推送个性化视频内容。抖音平台通过分析用户的观看历史、点赞和评论行为、分享记录等数据,从庞大的视频库中精选出最符合用户口味的视频进行推荐。这种个性化推荐系统不仅提高了用户体验,也帮助用户发现更多符合其喜好的视频内容,从而增强用户黏性和留存率。在这个

在开发业务系统过程中,数据库是非常重要的一环。因此,对数据库进行备份和恢复是非常必要的操作。本文将结合ThinkPHP6框架实例,介绍如何使用ThinkPHP6实现数据库备份与恢复。一、数据库备份1.1环境准备在进行数据库备份之前,需要确认如下几点:1、需要设置好mysql数据库的bin目录地址,并把其路径加入系统Path变量中;2、需要安装好mysqld

如何应对Linux系统中的文件系统损坏和恢复问题在使用Linux系统时,由于各种原因,文件系统可能会遭受损坏,这可能导致数据丢失和系统无法正常运行。因此,我们需要知道如何应对文件系统损坏和恢复问题,以保护我们的数据和系统的稳定性。如何判断文件系统是否损坏?当文件系统受损时,将会出现一些明显的迹象。例如,文件或文件夹无法访问、文件大小异常、系统启动慢或无法启动


熱AI工具

Undresser.AI Undress
人工智慧驅動的應用程序,用於創建逼真的裸體照片

AI Clothes Remover
用於從照片中去除衣服的線上人工智慧工具。

Undress AI Tool
免費脫衣圖片

Clothoff.io
AI脫衣器

AI Hentai Generator
免費產生 AI 無盡。

熱門文章

熱工具

VSCode Windows 64位元 下載
微軟推出的免費、功能強大的一款IDE編輯器

SublimeText3 Linux新版
SublimeText3 Linux最新版

記事本++7.3.1
好用且免費的程式碼編輯器

EditPlus 中文破解版
體積小,語法高亮,不支援程式碼提示功能

禪工作室 13.0.1
強大的PHP整合開發環境