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http://qyiyunso.blog.163.com/blog/static/350776862010826115537113/
今天一時手快 rm -rf .* ，刪除了一個重要郵件目錄，幸好通過extundelete恢復了。
記下操作流程：
1.準備工作
主要通過 extundelete
0.2.0完成恢復
需要依賴兩個包
sudo aptitude install e2fsprogs e2fslibs-dev
下載頁面http://extundelete.sourceforge.net/
快速下載： download extundelete
編譯三部曲
./configure
make
sudo make install
2.如果分區已經掛載，先umount，並且在將要恢復的地方查看空間大小
df -h ./
如果你要恢復的是根目錄或者系統目錄就只有拿硬盤掛到另外一臺電腦上操作了。
3.恢復制定分區下所有刪除文件，默認恢復到執行命令的目錄下，文件夾名字爲RECOVERED_FILES，使用詳情請參考：extundelete --help 運行的結果
sudo extundelete /dev/sda8 –restore-all
－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－
$ extundelete --help
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 ./RESTORED_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 '/' (it
must be one of the paths returned by --dump-names).
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-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.