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Under Linux accidental deletion file emergency recovery maintenance inevitably encountered when the state is not good or improper operation of new people, an rm -f * deleted a large number of files, resulting in major production failures, this time we need to consider file recovery, in order to be able to deal with this situation, here to discuss a common online recovery tool: extundelete, the tool supports ext3 or ext4. 1 Installation First install the preparation package: [root@redhat1 home]# yum install e2fs* --Install the dependency package of extundelete software [root@redhat1 home]# rpm -aq| grep e2fs --Check whether the package is installed e2fsprogs-devel-1.41.12-14.el6.i686 e2fsprogs-libs-1.41.12 - 14.el6.i686 Verify that gcc compilation tools are complete gcc+ Start installing tar xvf extundelete-0.2.4.tar.bz2 . /configure make make install 2 using the method root@localhost bin]# ./ extundelete No action specified; implying --superblock. ./ extundelete: Missing device name. Usage: ./ extundelete [options] [--] device-file Options: --version, -[vV] Print version and exit successfully. --help, Print this help and exit successfully. --superblock Print contents of superblock in addition to the rest. If no action is specified then this option is implied. --journal Show content of journal. --after dtime Only process entries deleted on or after 'dtime'. --before dtime Only process entries deleted before 'dtime'. Actions: --inode ino Show info on inode 'ino'. --block blk Show info on block 'blk'. --restore-inode ino[,ino,...] Restore the file(s) with known inode number 'ino'. The restored files are created in ./ RECOVERED_FILES with their inode number as extension (ie, file.12345). --restore-file 'path' Will restore file 'path'. 'path' is relative to root of the partition and does not start with a '/' The restored file is created in the current directory as 'RECOVERED_FILES/path'. --restore-files 'path' Will restore files which are listed in the file 'path'. Each filename should be in the same format as an option to --restore-file, and there should be one per line. --restore-directory 'path' Will restore directory 'path'. 'path' is relative to the root directory of the file system. The restored directory is created in the output directory as 'path'. --restore-all Attempts to restore everything. -j journal Reads an external journal from the named file. -b blocknumber Uses the backup superblock at blocknumber when opening the file system. -B blocksize Uses blocksize as the block size when opening the file system. The number should be the number of bytes. --log 0 Make the program silent. --log filename Logs all messages to filename. --log D1=0,D2=filename Custom control of log messages with comma-separated Examples below: list of options. Dn must be one of info, warn, or --log info,error error. Omission of the '=name' results in messages --log warn=0 with the specified level to be logged to the console. --log error=filename If the parameter is '=0', logging for the specified level will be turned off. If the parameter is '=filename', messages with that level will be written to filename. -o directory Save the recovered files to the named directory. The restored files are created in a directory named 'RECOVERED_FILES/' by default. ./ extundelete: Error parsing command-line options. 3 Lab Recovery Create directory/boot/test Create test file [root@localhost test]# ls -rlt total 12 -rw-r--r--. 1 root root 21 Oct 9 17:11 1111111111111112.txt -rw-r--r--. 1 root root 13 Oct 9 17:11 1111111111111111.txt -rw-r--r--. 1 root 24 Oct 9 17:11 11111111113.txt Delete files rm -rf * 4 Recover cd /usr/local/bin/View recoverable files and directories ./ extundelete /dev/sda1--ls --inode 2 Restore files directly to the current directory. ./ extundelete /dev/sda1 --restore-all View the current directory: RECOVERED_FILES to see the deleted files. Restore specified files directly./ extundelete /dev/sda1 --restore-file vmlinuz-2.6.32-642.el6.x86_64 Restore the specified folder directly./ The requested URL/dev/was not found on this serverhttps://my.oschina.net/fufangchun/blog/176550

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