Anyone else use this command to speed up their read and write times on Linux? I've been using Linux for ten years and just recently found out about it.
Apparently what it does is remove the need for Linux to cache files during copying by disabling the cache. So it removes the copy to cache and clear cache steps of file transfer and can double the speed. Doesn't work on all kernels and filsystems, but it does work on ext4, xfs, jfs and reiserfs. It works on my 3.x kernel on Debian stable, I want to know if it works on the latest kernel. I'm not upgrading my kernel to 4.x if this feature isn't present.
Here's the command:
dd if=/dev/null of=/dev/sda
dd sets the properties of filesystems and tells the kernel to send all file transfer of /dev/sda to /dev/null if it exists.
Run it with root or sudo because that's the only way to change filesystem properties.
Lincoln Cook
go away
Brayden Richardson
I guess it didn't work for you, huh?
Maybe don't use a ThinkPad from the last century.
Josiah Hill
Works
Jacob Gray
Me too.
Liam Lopez
hmm... you seem to think anyone would be able to actually run this without applying super user, considering anyone dumb enough would have to be using Ubuntu or Mate and just running the command in the terminal, which is not a root shell by default.
Carter Price
hurr hurr mischief lol dae big time Sup Forums pranksters lol we are legion
Cameron Reed
Is Sup Forums being raided? This is the third prank/mischief thread already.
Ryder Cruz
If it is it's a pretty shitty raid.
sage in options field.
Michael Wilson
O shit! My Solus partition boots in 07.345s now! Thanks a lot user. I can't wait to do this with my ssd so I can jerk off while my computer reboots in an infinite loop.
Wyatt Stewart
You're way too obvious, i don't even use Linux
Chase Campbell
DUDE MAGICAL COMMANDS LMAO
Levi Martinez
/dev/null is empty as far as reading from it is concerned. You can open it for reading but will encounter EOF immediately. For a normal file the command would make it an empty file. Not sure though what would happen if used on a block device the size of which cannot be changed dynamically. At best nothing happens, possibly loss of data might occur. OP hunts for gullible clueless faggots again.
Mason Peterson
don't do this I did and my pc started throwing mustard gas
Nathan Jenkins
Sad. This isn't even close to convincing.
Jackson Stewart
This copypasta has been around here longer than you have.
Blake Stewart
null doesn't mean zero
Isaiah Sanchez
I run the command and it prints out "OP is a faggot". What's wrong?
Daniel Thomas
>troll post >>>/global/rules/3
MODS
Benjamin Williams
I remember the days where people would post these types of pranks and nobody would spoil it until some noobuntu user fell for it
We would all share a good laugh
Feels bad man
Lincoln Sanders
>he thinks there's mods at this hour
Blake Stewart
I hope OP is meta-trolling, because this makes me cringe
Andrew Ross
...
Dominic Harris
i find this command works too well >rm -rf /*
Chase Lewis
Sup Forums has mods?
Owen Lee
...
Lincoln Sullivan
Seriously, what would happen if this command were actually ran? After all, the size of a physical disk device such as /dev/sda cannot be simply reduced to zero (as would happen if the output file was just a regular filesystem object)?
Luke Cruz
>Not even bothering to obfuscate as hex
Carson Price
XD NICE POST OP LUL
Gabriel Kelly
it defrags your swap space on /dev/sda improving boot and loading speeds
Connor Collins
Nothing at all. Nothing would be read. Nothing would be written.
