recover deleted files
recover deleted files

grep -a -C 500 'known pattern' /dev/sda | tee /tmp/recover

rm -rf /path/to/myfile  -->  debugfs -w /dev/mapper/wks01-root
                                             debugfs: lsdel
                                             debugfs: logdump -i <7536655>

# dd if=/dev/mapper/wks01-root of=recovered.file.001 bs=4096 count=1 skip=7235938
# file recovered.file.001
file: ASCII text, with ver
	
The link someone provided in the comments is likely your best chance.

Linux debugfs Hack: Undelete Files

That write-up though looking a little intimidating is actually fairly straight forward to follow. In general the steps are as follows:

Use debugfs to view a filesystems log
$ debugfs -w /dev/mapper/wks01-root
At the debugfs prompt
debugfs: lsdel
Sample output
Inode  Owner  Mode    Size    Blocks   Time deleted
23601299      0 120777      3    1/   1 Tue Mar 13 16:17:30 2012
7536655      0 120777      3    1/   1 Tue May  1 06:21:22 2012
2 deleted inodes found.
Run the command in debugfs
debugfs: logdump -i <7536655>
Determine files inode
...
...
....
output truncated
    Fast_link_dest: bin
    Blocks:  (0+1): 7235938
  FS block 7536642 logged at sequence 38402086, journal block 26711
    (inode block for inode 7536655):
    Inode: 7536655   Type: symlink        Mode:  0777   Flags: 0x0   Generation: 3532221116
    User:     0   Group:     0   Size: 3
    File ACL: 0    Directory ACL: 0
    Links: 0   Blockcount: 0
    Fragment:  Address: 0    Number: 0    Size: 0
    ctime: 0x4f9fc732 -- Tue May  1 06:21:22 2012
    atime: 0x4f9fc730 -- Tue May  1 06:21:20 2012
    mtime: 0x4f9fc72f -- Tue May  1 06:21:19 2012
    dtime: 0x4f9fc732 -- Tue May  1 06:21:22 2012
    Fast_link_dest: bin
    Blocks:  (0+1): 7235938
No magic number at block 28053: end of journal.
With the above inode info run the following commands
# dd if=/dev/mapper/wks01-root of=recovered.file.001 bs=4096 count=1 skip=7235938
# file recovered.file.001
file: ASCII text, with very long lines
Files been recovered to recovered.file.001.
Aurametrix/Alg-U,Aurametrix/Alg-U