linux hdd recovery

Data Recovery Failure Description:The original storage is a 12 2T hard disk composed of Linux RAID6, the file system is EXT3, this storage is zoned 3 LUNs, each 6TB size, one day after the raid failure, maintenance personnel in order to salvage the data, the failure of the storage to allocate raid, and initialized.After a long period of initialization, the maintainer detects that the situation is different

650) this.width=650; "Src=" Http://s3.51cto.com/wyfs02/M00/89/1C/wKioL1gIW4GwRS7qAANbvDMbDGY282.jpg-wh_500x0-wm_3 -wmp_4-s_1635583535.jpg "title=" Linux mistakenly deleted, formatted. jpg "alt=" wkiol1giw4gwrs7qaanbvdmbdgy282.jpg-wh_50 "/>I. General: Based on Linux system, delete data and formatted data recovery scheme1, based on the Ext2/ext3/ext4 file system2,

logical volumesLvcreate-n mydata-l 5G MYVG5 Formatting logical VolumesMkfs.ext4/dev/mapper/myvg-mydata6 Mounting Logical volumesMount/dev/mapper/myvg-mydata/lvm_data7 Modify the MySQL configuration file to make the data file Datadir=/lvm_data on the logical volume8 Restart MARIADB Service9 Creating a database to operateMysqlCreate Database Qiangge;Use Qiangge;CREATE table six (ID int,name char (20));INSERT into six values (1, ' Six '), (2, ' sixsix ');10 Locking the tableMysqlFlush tables read

=blocksize" |CPIO-ITV Write Backup to remote device # TAR-CVF-. | (rsh remote_system dd of=device obs=block_size) # dump 0BDSF 100000 100000-|ssh remote_host "dd if=device bs=64k" # TAR-CVF-|ssh remote_host "dd if=device bs=10k" # CPIO-OACVB |ssh remote_host "dd if=device bs=5k" Linux Bare Metal Recovery method: 1, backup important metadata # Fdisk-l >/etc/fdisk-l.txt 2, with local tools backup system # CD/

The hands are too fast and the intestines are ruined. Would have been to delete a file rm path/myfile.txtThe result somehow added a *, becameRM Path/myfile.txt *Hurriedly LS, found that all the code is Utopia, has not been submitted, has not been backed up. The deletion was not confirmed. A second, the world will be pure.Looking around with a fluke, there is no compression package backup. There are some backup places that are also very early in the work.Want to cry without tears.Therefore, the R

where you think it's safe.At the end of the backup command you may see a hint: ' Tar:error exit delayed from previous errors ', in most cases you can ignore it.You can also use BZIP2 to compress files, BZIP2 is higher than gzip compression rate, but slower. If the compression ratio is important to you, then you should use BZIP2, "J" instead of "Z" in the command, and give the file a correct extension "bz2". The complete command is as follows:# tar CVPJF backup.tar.bz2–exclude=/proc–exclude=/los

Linux operation and Maintenance Phase II (14) Backup and recoveryOne, 1,Linux system Important data:/root/,/home/,/etc/,/var/spool/mail/,/boot/,/var/lib/mysqlApache Backup data:/etc/httpd/conf/httpd.conf,/var/www/html/,/varlog/httpd, the above rpm Package installation method of important data; /usr/local/apache2/conf/httpd.conf,/usr/local/apache2/htdocs/,/usr/local/apache2, the above is the source package i

little supplement to the common commands of MySQL database;A few common MySQL-related management commandsMySQL command: Basic text, display and use of MySQL database. The previous usage has been simply mentioned, such as login.The Mysqladmin command, which is used to create and maintain MySQL database commands, has been briefly mentioned;Isamchk is a database file that is used to repair, inspect, and optimize the. ISM suffix;Mysqldump is used for backing up the database, which has been explaine

Determine what to back upThe file-based nature of Linux is a great advantage when backing up and restoring a system. In Windows systems, the registry is very relevant to the system. Configuration and software installation is more than just putting files on the system. Therefore, restoring a system requires software that can handle the features of Windows. In Linux, the situation is different. Configuration

()#define Raw_local_irq_restore (flags) Arch_local_irq_restore (Flags)The following is an example of the implementation of the functions of Arch_local_irq_save () and Arch_local_irq_restore () x86.3. Arch_local_irq_save () and Arch_local_irq_restore () the implementation of these two functions on the x86/*linux-4.14.12/arch/x86/include/asm/irqflags.h#70*/ - StaticInline Notrace unsignedLongArch_local_save_flags (void) in { the returnNative_

] parameters Description -0123456789 the level of backup, 0 means all backups, others represent incremental backups, for the last lower level, Back up the file system only modified or new file default 9 -D Set the density unit of the tape to BPI -j Compress write, specify compression level such as 2 eSTORE[ function Description ]Recovering a f

ObjectiveAs a multi-user, multi-tasking operating system, the files under Linux are hard to recover once they are deleted. Although the delete command only deletes the file nodes, it does not really erase the contents of the file, but other users and some processes that have write actions will soon overwrite the data. However, for home use of Linux, or mistakenly delete files after timely remediation, or ca

; "src=" Http://s2.51cto.com/wyfs02/M00/86/84/wKioL1fCRRaBCTfpAABBFMb_rKU572.gif "style=" width : 720px;height:396px; "title=" Rpm7.gif "width=" 720 "height=" 396 "border=" 0 "hspace=" 0 "vspace=" 0 "alt=" Wkiol1fcrrabctfpaabbfmb_rku572.gif "/>8. Then use the RPM command to locate the path where the RPM package is installed, pointing to its installation path and declaring it to be installed as the root user.650) this.width=650; "src=" Http://s2.51cto.com/wyfs02/M01/86/84/wKioL1fCRRbQtKsrAAAQ6rgP

;Command after prompt is sh-4.1#LS is displayed as the root directory of the file;650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/7E/F9/wKioL1cOdo-x0p1PAAAuNmWiNvE921.png "title=" 10.png "alt=" Wkiol1codo-x0p1paaaunmwinve921.png "/>10. Here we carry out the ls/mnt/sysimage/etc/passwd-(when the tab is complete, we need to change the passwd-name and use the MV. )650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M01/7E/FC/wKiom1cOdemhnwNaAAASk1bNRDQ421.png "title=" 11.png "alt=" Wki

After server restarts for the Linux operating system. System boot error, the system can not be used properly.1, error message 1.1, error screen information1.2, error message extraction key information(1)/dev/sda3:file ... (Inode #139928. MoD time Thu May 28 03:28:11 2015)Has 1135 multiply-claimed block (s), Sharedwith 1 file (s):(2)/dev/sda3:unexpected inconsistency. RUN fsck manually.(I.e.,without–a or–p options)[FAILED](3) * * * An error occurred du

Tags: delete root home directory mistakenly deleted folder directory To/rootFirst, how to restore the Linux root folder after deletion?Today with ordinary users into the system to switch root user prompt without root home directory, do not know what the situation caused$su - rootwarning: cannot change directory to /root-bash-3.2#Second, online search method:Root's home directory is deleted, manually establish/root, and then copy the profile from the u

Add a new virtual hard disk to the virtual machine with the format selected as SCSISometimes you may need to restart your system to take effect!You can use the Partprobe command to re-read the partition table!The following format is to feed him partition file typeThe last is to create a mount point, the partition mounted on it!This is a mount, but there is a problem, after the restart is all invalid, need to re-mount!Description of available mount points:OK, rewrite the file that you just edited

Before participating in the CTF competition when the temporary write, there are a lot of shortcomings, but can be used, put it out to share to everyone, hope to help everyone.Script one: Record the current directory situation#!/bin/bashfunction Getdir () {for element in ' LS $ 'DoDirfile=$1 "/" $elementIf [-D $dirfile]ThenGetdir $dirfileElse#将目录结构和大小存为一个临时文件Echo ' Du-ab $dirfile ' >>/t.txt#echo $dirfile >>./dir.txtFiDone}# Monitored DirectoriesDir= "/root/yxy"Getdir $DIRfunction Getdir1 () {for

((Long*) This->_flag,1); - } $ $ voidResume () { - if( This->_flag >0) { -__sync_lock_test_and_set ((Long*) This->_flag,0); the -::p Thread_mutex_lock ( This-_mutex);Wuyi::p thread_cond_broadcast ( This-_cond); the::p Thread_mutex_unlock ( This-_mutex); -}Else Wuprintf"thread is running\n"); - } About $ Virtual voidOnRun () { - while( This->_flag 0) { -printf"Thread running\n"); -:: Usleep ( +* +); A } + } the - Private: $ Static void*_thre

The complete database file set includes: database startup parameter file, control file, data file, log file. The location and name of the file can be obtained in the following way.parameter File$ORACLE _home/dbs/spfile[$ORACLE _sid].ora$ORACLE _home/dbs/init[$ORACLE _sid].oraIf the init[$ORACLE _sid].ora file does not exist, it can be copied from the $oracle_base/admin/[$ORACLE _sid]/pfile directory and renamed.Control filesSql> Show Parameter Control_filesData filesSql> select file_name from Db