Undelete In Linux

Manuel Arriaga writes "[To the editors: I am not a professional programmer, nor will I ever be one. My income does not depend on my computing/programming skills, and hopefully it never will. So promoting free software I wrote does not help me in any financial way, no matter how indirect. libtrash is free software (GPL2), and I distribute it for free from my website. I have nothing to gain from the increased exposure, except for knowing that I am helping others. And I know slashdot isn't freshmeat... With that out of the way:] I have seen this topic discussed in the LKML multiple times by now, and many more people asking in the newsgroups why "I can't recover my deleted file on GNU/Linux". Here is my answer to that question. libtrash gives Linux a real "trash can". And it has been doing so (with varying degrees of stability) for more than one year now. If you consider it appropriate, make this information public on slashdot."

Comments

Re:I know you're kidding, but....

[oever]

[X] Easy support for video files and DVD - mplayer

I've installed mplayer on two SuSE 8.0 linux machines, and it's amazing. You can see DVD's, AVI's and even look at at microsoft media streams.
e.g. 'mplayer mms://streaming.omroepbrabant.nl/live1'

And how easy do you want it? You can easily make an icon on the desktop that starts mplayer on the dvd currently in the drive.

So, visit www.mplayerhq.hu and rejoice.

I'm Torn

[ReadParse]

I know in my heart that there's no need for this on Unix, because you shouldn't run as root AND use rm -rf and THE decide that you shouldn't have done that. There are safeguards in place and, after all, since you're a Linux superuser, you're either good enough that you don't make that kind of mistake or the system isn't important enough for it to really matter.

Having said that, even though I know how dumb it was, I once accidentally issued `rm -rf /bin`. Funny story, though:

For some reason or another, I happened into an additional hard disk that I put into my Linux box at work (not a production box). I don't remember how big it was, but it was big enough relative to my primary disk that, when I needed a mount point, I chose /big. That was the first mistake. I have no idea why I felt the need to mount it that close to the root. Although the similarity between "big" and "bin" is obvious in retrospect, it is, after all, retrospect.

Actually, that wasn't my first mistake. My first mistake was running as root.

I mounted the disk and played around with it. I suspect that it was my first time playing around with an additional hard disk, so I copied files over and examined "df -k" and so forth, and eventually I guess I decided to unmount it and do it all over again... I probably would have done endless, mindless file copies for the rest of the day, I was so thrilled with it. Hey, I was young.

This is where it gets embarassing. Perhaps everybody has some mysterious glitch which adds confusion where there should be none. Yes, I honestly do know the difference between a symlink and a mount... I swear it. But in the very brief period of time that it takes to type a command, I sometimes confuse the two in my mind and try to unmount using the "rm" command. More specifically, "rm -rf".

I also noticed on that day that we humans have kind of a built-in autocompletion. If you type the first few letters of your last name, you have a tendency to follow through with the rest of it. And that tendency increases dramatically the closer you get to the last letter. The way I noticed this was when I attempted to issue `rm -rf /big` and immediately pressed return (I found that return is also a mysterious part of that autocompletion).

Just so you know, there are a great many important things in /bin. Among them, all of the shells, chmod/chown, grep, kill, ls (try working without that), mv.... the list goes on and on.

This story also reminds me of the time I evaluated WS_FTP Server when it first came out. I needed an FTP server so I could go home and work on some files on an NT server. I wanted access to the whole box, so I set up my FTP account's home directory as c:\ -- I had no idea that when I deleted that account it would attempt to delete the user's home directory, even if it was c:\.

I've never heard a disk thrash like that before or since. And you've never seen anybody turn a box off as quickly as I did when I realized what was going on. Alas, it was too late. Reinstallation and backup restore (yes, I had a backup) commenced immediately. By the way, I've never fully accepted responsibility for that -- I still feel like it should have said "You're about to delete c:\ and all of it's subdirectories. Are you sure?" Because I really didn't think it would do that.

Anyway, my point is that "there, but for the grace of a godlike substance, go you". It's really easy to say we're too good for this, and there's a damn good case that a linux trashcan is not necessary, but for those who want it I think it's a cool piece of code.

That is all.

RP