linux hdd recovery

a disk image file, you perform compression:dd if=/dev/sda | gzip > disk.img.gzdd if=/dev/sda | bzip2 > disk.img.bz2That's good! Ghost has all the features.2. Partition cloningIf we don't want to clone the entire disk and just want to back up some of the partitions that hold the data, you'll need to clone a partition. As stated in the preliminary knowledge, partitioning is also a file under Linux. For exampledd if=/dev/sda1 of=~/part1.imgThe first par

First referenceSudo-imkdir /mntMount /dev/sda1 /mntGrub-install --force --no-floppy --root-directory=/mnt /DEV/SDAThen under GRUB or refer to the content below.LiveCD under the Casper Directory of Vmlinuz and Initrd.lz, put it in the root directory of a random partition of Windows, and then start on the menu by pressing C, then grub> under inputGrub>set root= (hd0,x)----> This is the partition where Vmlinuz and Initrd.lz are located, such as the first partition is (hd0,1), to be confused

"alt=" Wkiol1lp2zwbvvonaafk74ylqcm959.png-wh_50 "/>4. after the third step of operation, will appear, is it feeling back to the second step? No, here's the "B" key to the keyboard to enter the boot system. Notice, here's the "B" key .650) this.width=650; "Width=" 554 "height=" 309 "src="/e/u261/themes/default/images/spacer.gif "style=" Background:url ("/e/u261/lang/zh-cn/images/localimage.png") no-repeat center;border:1px solid #ddd; "alt=" Spacer.gif "/>Retrieve the Lost mysql root user passwo

After the Linux operating system server restarts, the system starts an error and the system does not work 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 occurr

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 deleted, and there was no backup. My friend

The file is from the Dark Count of cnblogs,ArticleAddress: http://www.cnblogs.com/hangxin1940/archive/2011/07/10/2102087.html Previously, it was a Windows shell, and the dark count was changed to the Linux version. This is the complete package:/files/super119/androidrootandrecovery.zip From the script point of view, the most important thing is thisProgramNow: rageagainstthecage. It seems that this program restarts the adbd daemon process run

) Stage 1 MBR (Master boot record) master boot record 0 tracks on hard disk, one sector, 446 bytes*) dd If=/dev/zero Of=/dev/vda bs=446 count=1 can empty MBR*) go to save mode, perform chroot/mnt/sysimage switch to real/environment,and execute GRUB2-INSTALL/DEV/VDA2) Phase 2 Grub File boot phaseLocate the/boot partitionRead /boot/grub2/grub.cfgfile lost,grub2-mkconfig >/boot/grub2/grub.cfgboot kernel, read-only mount /deviceTesting equipmentInitialize the device driverEnter the system initializa

In order to reduce the loss to a minimum, Linux mistakenly deletes the file to do the following:One: Unmount or mount the partition that needs to be resumed in a read-only manner;EXAMPLE:UMOUNT/DEV/SDB1 #卸载挂载的sdb1Two: Install Extundelete (need Epel source for support)Example:yum-y Install ExtundeleteThree: View the inode for the file in the SDB1 partitionEXAMPLE:EXTUNDELETE/DEV/SDB1--inode 2650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M01/79

) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/76/AA/wKioL1ZYaVXxz8oyAAANSDJWszI431.png "/>5 to the entire SDB1 partition into the backup650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/76/AA/wKiom1ZYaPbDKyJNAAHvj70MNK8737.png "/>650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/76/AA/wKioL1ZYaVeRW6VDAAD2CpOlctc483.png "/>6 backup for the specified file or directory650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M01/76/AA/wKiom1ZYaPjw0cG3AAHdkH4zvYA942.png "/>7

active queue ?The answers are in, Page_launder and Reclaim_page.Page_launder:if (pagetestandclearreferenced (page) | | | page->age > 0 | | At this point the reference count is greater than 1 (!page->buffers page_count (page) > 1) | | Page_ramdisk (page)) { del_page_from_inactive_dirty_list (page); Add_page_to_active_list (page); Continue Reclaim_page:if (pagetestandclearreferenced (page) | | | page->age > 0 | |

In the previous article Linux kernel source code scenario analysis-the slab-allocation and release of memory management, finally formed the structure as follows:Figure 1We see a number of pages occupied by free slab blocks, and we do not release them ourselves; we collect them through kmem_cache_reap and Kmem_cache_shrink. The difference between them is:1, we first look at Kmem_cache_shrink, the code is as follows:int Kmem_cache_shrink (kmem_cache_t *

the conflicting condition. But it won't recover.Directories that were deleted16. Code Base URL ChangeSVN switch (SW): updates the working copy to a different URL.Usage: 1, switch URL [PATH]2. Switch--relocate from to [PATH ...]1, update your working copy, map to a new URL, its behavior is similar to "SVN update", will alsoThe files on the server are merged with the local files. This is the one where the working copy corresponds to a branch or tag in the same warehouse.Method.2, rewrite the work

this line of the RO back part of the removal, change ro for RW, and then add Rd.break650) this.width=650; "src=" Https://s3.51cto.com/wyfs02/M00/9E/18/wKiom1mLGE_xU-OKAAAoCtdCh1Q871.png "style=" float : none; "title=" screenshot from 2017-08-09 11-10-17.png "alt=" Wkiom1mlge_xu-okaaaoctdch1q871.png "/>Switch to the real root directory650) this.width=650; "src=" Https://s3.51cto.com/wyfs02/M02/9E/17/wKioL1mLGAyh2h3CAAAZ1zH0n6w241.png "style=" float : none; "title=" Img_4969.png "alt=" Wkiol1mlga

-07 16-10-01.png "alt=" Wkiom1mie1jzzq5oaaahw25u04y735.png "/>Reboot the system and load the CDROM installation disk file650) this.width=650; "src=" Https://s3.51cto.com/wyfs02/M00/9D/EB/wKioL1mIe1nSLBA4AACXWPzz6eI788.png "style=" float : none; "title=" screenshot from 2017-08-07 16-10-18.png "alt=" Wkiol1mie1nslba4aacxwpzz6ei788.png "/>Recovering Initramfs image files650) this.width=650; "src=" Https://s3.51cto.com/wyfs02/M01/9D/EB/wKiom1mIe1nizyJEAAAxr-hA4_I070.png "style=" float : none; "titl

1. Modify the MySQL configuration file my.cnfVI my.cnfAdd content under the [Mysqld] tab: Skip-grant-tables2. Restart the MySQL serviceService mysqld Restart3. Log in to MySQLMysql-u root-pPrompt for password, enter directly to log in to MySQL4. Change the root password and submitUpdate Mysql.user set Password=password (' New password ') where user= ' root ';Flush privileges;5. Unregister skip-grant-tables content from the my.cnf fileVI my.cnf#skip-grant-tables6. Restart MySQLMysqlroot Password

1, the Linux system needs to back up the data/root/Directory:/home/directory:/var/spool/mail/directory:/etc/Directory: Other directories:2, the installation of services dataData that Apache needs to back upconfiguration files, Web page home directories, log filesMySQL needs to back up the data = Source Package installed mysql:/usr/local/mysql/data/RPM Package Installation of mysql:/var/lib/mysql/3. Full backup, incremental backup, differential backup(

have been thinking about a problem recently, if hand shake accidentally execute command chmod 777-r/, just no system backup, it is really tragic. The backup of production system is really the most heavy.This session only discusses how to back up system file permissions.1. Create a file for testing.[email protected] ~]# ll testfacl.txt-rw-r--r--1 root root 0 Mar 05:27 testfacl.txtYou can see that the Testfacl.txt file permission is 644.2. Backup permissions for all files under the current directo

root24576aug2200:13/var/lib/rpm/__db.001-rw-r--r--1 rootroot229376aug2200:13/var/lib/rpm/__db.002-rw-r--r--1 rootroot1318912aug2200:13/var/lib/rpm/__db.003-rw-r--r--1 rootroot753664Aug2200:13/var/lib/rpm/__db.004[[email Protected]~]$sudorm-f/var/lib/rpm/_*[[emailprotected]~]$sudo ls-l/var/lib/rpm/_*ls:cannotaccess/var/lib/rpm/_*:Nosuch fileordirectory[[emailprotected]~]$sudodb_verify/var/lib/rpm/ Packagesdb_verify:page7709:overflowpageofinvalidtype13db_ Verify:page3828:page6681encounteredasecon

collapsed!!! 650) this.width=650; "src=" Http://img.baidu.com/hi/face/i_f06.gif "alt=" I_f06.gif "/>650" this.width=650; " Src= "Http://img.baidu.com/hi/face/i_f06.gif" alt= "I_f06.gif"/>650) this.width=650; src= http://img.baidu.com/ Hi/face/i_f06.gif "alt=" I_f06.gif "/>ERROR 1290 (HY000): The MySQL server is running with the--skip-grant-tables option so it cannot execute this statementAnd then I tried to flush the privileges a bit,mysql> flush Privileges; Query OK, 0 rows affected (0.01 sec

This article describes how to use backup scripts and commands and commercially available software to protect disk data securely and efficiently in a Linux environment. The backup and recovery system assumes the function of ex ante backup and afterwards recovery. In the current high-speed development of the network environment, any one network information systems