Shell Programming and Scripting

Hello everbody

I changed one of my important files with a false sed statement by mistake now I lost my file and I hope I could bring it back

what I did was:

Code:

sed '/^..//' a > myfile

myfile should have been another file like b ot something I know I also forgot to place an 's' to the beginning.

Is it possible to bring myfile back now it is emty it was an output file of a program which worked for 2 days

I don't think is there any reason your input file deleted/changed because of your script. It will give error.

here you are performing operation on file a. so it won't change any thing to file a.

I know, the file a did not changed of course. I want to bring back the changed file is which is in this case "myfile" not a.

If your system administrator made backups of your files, you can ask to havemyfile restored to the value it had when it was last backed up before you recreated it. Otherwise, it is probably gone.

If no one has overwritten the blocks that were freed when you recreated the file, the data might still exist on unallocated blocks on the the hardware underlying that filesystem. If you are that lucky and it is EXTREMELY important that you recover that data, immediately unmount that filesystem and then find an expert to help you search the free list for your data.

Ok I see, I could not find any backup file but olnly find a previous backup file which is what I do not need. Thank you I think it's gone

Your code and description doesn't match.