Though the Windows thing was really funny 😂.
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the linux-file-deletion is used as a example for good software design. It has a very simple interface with little room for error while doing exactly what the caller intended.
In John Ousterhout’s “software design philosophy” a chapter is called “define errors out of existence”. In windows “delete” is defined as “the file is gone from the HDD”. So it must wait for all processes to release that file. In Linux “unlink” is defined as “the file can’t be accessed anymore”. So the file is gone from the filesystem immediately and existing file-handles from other processes will life on.
The trade-off here is: “more errors for the caller of delete” vs “more errors due to filehandles to dead files”. And as it turns out, the former creates issues for both developers and for users, while the later creates virtually no errors in practice.
doing exactly what the caller intended.
No, no. Exactly what the user told it to do. Not what they intended. There’s a difference.
Exactly type
rm -rf /instead ofrm -rf ./and you ducked up. Well you messed up a long time ago by having privileges to delete everything, but then again, you are human, some mistakes will be made.Deleting the current directory via
./seems contrived since you would just use.or more likely the directory name from outside the directory. What does happen isrm -rf ${FOO}/while${FOO}is an empty string.Not sure if you’re referencing the Steam incident, but Steam did exactly that: https://www.theregister.com/2015/01/17/scary_code_of_the_week_steam_cleans_linux_pcs/
Even so,
.and/are right next to each other so it’s a likely typo. You might press enter before you catch it.The double check before you rm things 🤷.
${Insert meme of qwertz ganz not having that problem here}
yup, did that one on a server at work. had to go cap in hand to my manager to get him to fix it
Don’t modern versions of rm block calling on / unless you pass a separate flag?
Yup I think it’s --preserve-root
Machines will always do what you tell them to do, as long as you do what they say.
do what they say
What do they say?
Yes, the file itself (so the data and inode) is not gone as long as the handles live on. Only the reference is gone. You canstill recover the file. https://superuser.com/questions/283102/how-to-recover-deleted-file-if-it-is-still-opened-by-some-process#600743
The trade-off here is: “more errors for the caller of delete” vs “more errors due to filehandles to dead files”. And as it turns out, the former creates issues for both developers and for users, while the later creates virtually no errors in practice.
Tell that to my dded porn collection.
I like the windows delete philosophy of asking me before I delete something.
I fucking hate the windows delete philosophy of telling me I don’t have access after I said yes.
I’m this close to daily driving as Sadmin
Better would be to delete without confirmation but being able to quickly reverse it with Ctrl+Z
Siebel admin 🤨?
Sad man 😔
One drive has a trash for the trash. I’m still not convinced those files are gone after the 2nd empty, I think they just don’t show the other trash cans
It’s trash cans all the way down.
The cloud is just someone else’s trash can
You know what they say, one man’s trash…
Is another ones treature
Is another’s CLOUD ☝️🤓
That’s because our all file systems are god’s trash can.
Outlook on Exchange is like this. You can delete stuff to the Deleted Items directory. If you delete it from there it goes into another area called ‘Recover deleted items’.
GUI file managers generally have “Trash” feature as well.
They usually support one but it is generally not provided by the file manager it’s self. This means that assuming that the file managers use the same trash system you can trash a file on one recover it another.
The windows shell has really gone downhill in recent years, with spontaneous file locks and random hangs
It’s always the AV…
I’m so annoyed when I tell
rmto delete a terabyte of data and it’s nowhere near instant. I’d have probably gone insane if I was using Windows.1TB for Windows… depends on file size, but let’s presume you have 1TB of Word documents… just hit Enter and go watch the Matrix trilogy.
“what are you trying to tell me? I’ll be able to select ‘yes’ when it asks me if I’m sure I want to delete?”
“No, Neo. I’m saying when you switch to Linux you won’t have to.”
You just need to ask permission.
Oh man, that was great, brilliant! 👍
Akchooly, what you’re referring to as terabyte (TB) is called tebibyte (TiB), because window$ suck and JADEC made everyone believe that binary units are metric units, which is stupid. But we have the savior IEC which KDE is using in all of their software and I respect that.
Left side: I regularly go bowling with the demon core
Right side: I have read the demon core’s wiki 314 times
314 🤔… like as in Pi*100?
Mere coincidence
There is no such thing as coincidence.
Gets down and his knees and starts bowing to the chosen one
I never deleted my root system with rm but I did dd go sda instead of sdb and ended up losing my data.
Holy shit, me too. 6TiB poof
With great power comes great responsibility. Do check twice what you write.
Jokes aside, it has happened to almost everyone… and then you learn to QUADRUPLE CHECK dd commands.
I haven’t accidentally deleted a bunch of data yet (which, considering 99% of my interaction with Linux is when I’m SSH’d into a user’s server, I am very paranoid about not doing), but I have run fsck on a volume without mounting the read/write flashcache with dirty blocks on it first.
Oops.
It will happen to you sooner or later 😂… we’re all dead on a long enough time scale 🤷 😂.
or just don’t attach any drives except the main one to your system. ever.
That’s a very bleak future… at least for me.
I did, and it was fast. I was a complete noob, so I thought rm -rf /* would delete everything in the current folder. I hit Ctrl + C, but it was too late. Took a few seconds to wipe out the whole system.
Now wonder, which one is will be preferred by people who aren’t tech savvy.
They are not likely to be using the terminal. Pretty much every graphical file browser will ask for confirmation upon delete, and many will use a rubbish bin by default.
To be fair, assuming you are not using a wastebasket which comes pre installed in a lot of distros, you still need the right permissions to delete files that belong to the system and if you’re using rm you have to use the -rf option to remove a folder and it’s contents.
gio trashThis works for those of us in GNOME and GNOME-derived places.
Seems like KDE doesn’t have anything quite so simple. A quick web search suggests the correct command is
kioclientN move filename trash:/where N is the version number of kioclient. Very verbose. Worthy of a shellalias.Then there’s stuff like bashtrash. Or just write a small function, without full XDG compliance and all the edge cases.
If you’re going for cli, windows also can do rm -r -Force <path>
Or just do Shift Delete in Explorer.
You can do that?
Yes. Place finger on key and press lightly downward. ;)
Use the --force Luke
-confirm:$falseYeah, but get this! It’s not enough to just envoke cmd in Windows with just Win+R (sorry, sorry… Super+R 😁), even though you’re invoking it from an admin account, no sir, it’s still just a plain user as long as cmd is concerned 😂.
And this is what you get when you wanna do backwards compatibility all the way down to DOS 😂.
We have pretty good backwards compatibility too, to my knowledge it’s actually better.
My point was, MS has backwards compatibility all the way down to an OS that has no sense of users and permissions and that is why Windows, even nowadays, has these problems. If you get rid of the DOS legacy stuff, you can have decent user permission and security in place, but too much shit relies on legacy code, so they keep it.
backups / btrfs snapshots
Btrfs snapshots/subvolumes can now also be deleted with rm. It’s no longer necessary to use ‘btrfs subvolume delete’
Really?
As I always say, you get the best linux info from linux memes 😁.
Yep! (finally)
Every time I see I’ve of these memes my mind goes straight to infomercials.
Oh well. Didn’t really like my mum that much anyways 😢
Mom enters the chat…
Is that actually true? Does Windows check every file with Defender before deleting it?
Not just every file deleted, every file written to disk as well (downloaded, extracted from an archive, whatever).
It’s also how most AV software works, except Defender is slow AF.
also, defender is synchronous by default (e.g. nothing gets written until it gets scanned, and scanning parallelization is limited), and can only act asynchronously (aka write first, then queue check) on “trusted dev drives” (aka ReFS-based virtual vhdx partitions aimed at developers as a solution to horrible ntfs throughput, especially if defender is enabled)
Not true, it does get written before it gets scanned. In fact, it doesn’t even always scan before the file is read by explorer (yes, it’s the worst AV ever). It’s easy to prove this, just extract FFF’s WinRAR keygen and you’ll see what I mean.
Huh. All that security, and yet there are still so many viruses capable of infecting windows.
Huh… all that immune system yet there are still so many viruses capable of infecting humans.
Humans are easy targets 😁… we’ve lived semi-isolated from nature at least the last few hundred years.
I thought it checks every file closed
No, it scans file headers when you do read/write operations on disk. Every AV works this way, except, as I said, Defender is slow AF.
I can’t find talk I watched, but I found github issue it was based on.
Short version: Defender is triggered not on open, not on read or write, but on CloseHandle.
CloseHandle of what? Read/write operations?
Found! Even metadata chamge.
