Solaris

Dears,
hi all i write this command
rm -rf /export/home/john
this there any command make me able to restore this folder again

NO.... I afraid its not possible.. unless you have backup somewher...

what is your opunion for this solution
# init 1
Use following grep syntax:
# grep -b 'search-text' /dev/partition > file.txt
OR
# grep -a -B[size before] -A[size after] 'text' /dev/[your_partition] > file.txt
Where,

To recover text file starting with "nixCraft" word on /dev/sda1 you can try following command:
# grep -i -a -B10 -A100 'nixCraft' /dev/sda1 > file.txt

That might restore 1 file at a time, if you know what you're looking for, and how much text there was before and after your search string. It probably won't work for binaries (unless you're lucky), and if any process has written to the blocks previously occupied by that file you'll get a lot of garbage (if anything at all).

In short: you've probably learned 2 very valuable lessons:

very thanks pludi for your reply
really this is the first accedinat happen with me

Should you have used OpenSolaris and enabled its ZFS timeSlider feature, you would have recovered most if not all of that directory.