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How do you recover a data file in Oraclek after it has been mistakenly removed from the OS system? Do not panic at this time restart the database or the operating system, you can retrieve data files by DBWN process-related handles.
Test:
Step 1: Log in to the database as a DBA and view the path to the table space State and data file
[Oracle@localhost ~]$ Sqlplus/as SYSDBASql*plus:release 11.2.0.4.0 Producti
Reprinted at: Workshop. Although the DELETE command only marks the deletion in the file node and does not actually clear the file content, other users and some processes with disk write operations will soon overwrite the data. However, you can recover a Linux instance that is used by a single machine in your home, or rectify the file by mistake.1. A brief introduction to the ext2 File System StructureIn the ext2 File System Used in Linux,
Objective
1, this method only describes how to save the table name (data does not recover) if you want to restore the original data directly with Extundelete to restore the file back to the
2, and is applicable to usually not fully prepared in the case if there is a full preparation of the FRM and IDB documents can be put back on it
3, this method is also suitable for data table migration (migrate only one table) because the speed of discard and im
tail-f a.txtRoot 8401 7983 0 00:08 pts/3 00:00:00 ps-efView files that are still in the process of being called after the file is deleted:[Email protected]/]# Lsof|grep delTail 3247 root 3r REG 8,3 8427 5042/a.txt (Deleted)Retrieve the file by locating the corresponding process number in the/PORC directory:[Email protected]/]# ll/proc/3247/fd/Total 0LRWX------1
:00 tail-f a.txtRoot 8401 7983 0 00:08 pts/3 00:00:00 ps-efView files that are still in the process of being called after the file is deleted:[Email protected]/]# Lsof|grep delTail 3247 root 3r REG 8,3 8427 5042/a.txt (Deleted)Retrieve the file by locating the corresponding process number in the/PORC directory:[Email protected]/]# ll/proc/3247/fd/Total 0LRWX-----
Unlike Dos/windows, UNIX files are difficult to recover after being deleted, as determined by the unique UNIX file system architecture. The Unix file directory is not the same as dos/windows, the file is still saved after the deletion of the full file name, file length, the initial cluster number (that is, the file occupies the first disk block number) and other
Computers are often used. When deleting unwanted junk files, you are often prompted that they cannot be deleted. There are many reasons why files cannot be deleted when you browse Baidu and Google. The following describes several common solutions on the Internet:
1. Use the Registry to delete media
Article Title: how to restore accidentally deleted files in Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
As a multi-user, multi-task operating system, once the files in Linux are
type
Take a closer look at the Blocks below the file's timestamp: nothing. So let's take a look at the next block:FS block 2129985 logged at sequence 405648, journal block 64
(Inode block for inode 2121567 ):
This Journal has block information:Blocks: (0 + 1): 2142216
This is the address of the deleted file. let's run the recovery command again:$ Sudo dd if =/dev/sda5 of =/home/hchen/mytest_recovered.txt bs = 4096 skip = 2142216 count = 1
Let's check
And its type is:
Type: Bad type
Take a closer look atBlocks:Nothing. So let's take a look at the next block:
FS Block2129985Logged at Sequence405648, Journal Block64(Inode BlockForInode2121567):
This journal has block information:
Blocks :(0+1):2142216
This is the address of the deleted file. Let's run the recovery command again:
$Sudo Dd If=/Dev/sda5 of =/home/hchen/mytest_recovered.txt BS =4096Skip =2142216Count =1
Let's check the f
only restore the following 64KB files before registration. Please select the appropriate channel to register for use to eliminate restrictions on file size.
2. More easy to use six steps and take three steps
If you want to be more simple, choose FinalData software to restore it.
Run as Administrator and open FinalData, click the first button on the toolbar to select the drive you want to restore.
Select the location where
that the deletion of Sam files to clear the password to mislead some netizens.
If you encounter this problem, you can do the following: Copy the Sam file for the C:windows Repair folder to the C:windowssystem32config folder.
If you can't get into the system, you can execute the command in DOS:
Copy C:windowsrepairsam C:windowssystem32configsam
Note: The SAM file under repair was created when XP was ori
folder in the root directory/bbb, mount the shared folder under/BBB, as shown in6) Install the Environment Pack rpm-ivh/mnt/packages/e2fsprogs-libs-1.41.12-18.el6.x86_64.rpm, and its expansion pack rpm-ivh/mnt/packages/ e2fsprogs-devel-1.41.12-18.el6.x86_64.rpm, expansion pack as an error, follow the prompts to install the expansion pack's dependency package Libcom_err-devel = 1.41.12-18.el6 is needed by e2fsprogs-devel-1.41.12-18.el6.x86_64, then install the expansion pack as shown (if there i
Friday Basketball Group Someone asked mistakenly deleted the file how to recover, learned that it is Ext4 file system after I recommended ext4magic this tool, and then someone mentions the xfs words to do, just a few days ago to see Dave Chinner in the mailing list mentioned this problem, he recommended the tool is Xfs_ Irecover. Here's a little summary of how the delet
you want to install, easy to find. After the selection is completed, click Install
Installation complete, click "Finish" to open the software.
Software main interface as shown above, this software is charging software, not registered words have use time limit.
Two function Introduction1. Delete recoveryThis feature allows you to quickly recover a file that was mistakenly deleted on a disk, which is
Restore accidentally deleted oracle data files
Recovery Method for accidental deletion of oracle data files on the Linux platform simulates misoperations: the database is running normally and data files are directly rm. -- 1. test Environment: $ cat/etc/redhat-releaseCentOS release 6.5 (Final) select file_name from dba
I feel that myeclipse is really powerful. I have to write this function, or I am sorry for the author of myeclipse.
1. Restore class files
During Development a few days ago, I accidentally wrote 1000 linesCodeThe class is deleted, and the instinct is to press Ctrl + Z to restore, but it is useless, but there is still a solution to the search, it is a bit difficult to re-write it again
Unwilling, haha fin
In Linux, the/etc/fstab file is a disk mount problem, if the file is accidentally modified, or deleted, it will cause the system cannot be restarted. Because the/etc/fstab file is a record of the disk mount information, if there is a problem with the file, then the corresponding home directory (/) and (/boot) and swap disks will not be mounted, so this file is very important for the Linux system.I made the mistake is: I in the Hadoop cluster file conf
to viruses, this thumbs.db file is not a virus, it is no harm to the system.
Three, thumbs.db file can be deleted or shut off it?
XP system: For thumbs.db files We can hide this file, click on "Control Panel-Folder Options-View, in the advanced settings," do not cache thumbnails option. This hides the Thumbs.db file from being invisible.
Win7 System: Open the
Because the staff turnover is not pleasant, the system engineer after leaving, because the company did not close its VPN in time, the database server (Linux 6.5 Oracle 11.2.0.1) account is not modified, and finally directly up to RM oracle_base to kill, The tragedy is that the Oradata catalogue is also inside, and it is even more tragic that all the data files are in it. That is, the database was completely delete
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