@derobert - isn't hardware encryption just firmware encryption anyway? I could swear I read somewhere about a guy who hotwired the SATA +- leads on his Seagate and opened a serial terminal on his harddisk. He found the forgotten encryption key in plain text I think...
@derobert - I only knew enough to be annoyed, but at my old job we had to migrate a bunch of systems from McAffee based encryption to some MS thing - disklocker? - that cooperated with the UEFI firmware and the TPM mystery thing - I guess it's some on-board encryption module - and the disk's firmware. Probably couldn't be beaten with a soldering iron and a morbid curiosity, but it still seems like all software. Then again - there is that TPM mystery thing, but that's not on the disk. I dunno.
@terdon - while I don't know about the specific rules or whatever, I linked to an answer with 6 uvs on a question with 17 uvs titled Paint Pixels to Screen Using Linux Framebuffer above at SO. Seems weird that the one should be so obviously on-topic, but a similar - but not duplicate - question should be rejected.
Without sudo the command ssh server "cd path/to/directory && cp image1.png image2.png" doesn't have privileges to chmod the permissions.
But with sudo it would, but being run after ssh, it never gets password input for it on the remote server, so the solution is use -S and pipe a password for s...
ssh server " cd path/to/directory && echo sudo_password | sudo -S chmod 600 image2.png && cp image1.png image2.png"
@Anthon - Oh. Well, thanks. I at first took your comment as a well-deserved dig at me for missing the big public thing - like maybe it obviously couldn't configure quotas or something - then I read it again ... and again ... and loosely interpreted it the same way you just so concisely put it. So I asked.
Is there a good way to query for the number of processor cores? A more portable way (across Unices) would be nice, otherwise a Linux-specific one would work. An obvious approach is to parse /proc/cpuinfo. Can one do better? And is this question worth asking on the main site?
@mikeserv Well, yeah, ultimately its probably firmware at some point. But from the operating system side, it's hardware—it speaks the normal SCSI/SATA/SAS/FC interface, and operates entirely below the OS. The crypto algorithm itself might be done in silicon (for speed; you can get e.g., off-the-shelf AES hardware).
Ideally, the whole thing is packaged together in such a way that recovering the key while its operating is next to impossible and recovering it while not operating is impossible (well, infeasible, limited by your ability to brute force it)
But I think the disk you linked to has a password on it—fairly standard feature of IDE/SATA disks for ages—and platters that are not encrypted. The hardware encrypted disks have platters that are encrypted, and work similarly to LUKS.
@Braiam It's easy to write seven perpendicular lines provided they're not all straight (and probably make that in the shape of a kitten) and to write red lines with green or transparent ink provided it's on a mask to be put on top of a red background. That guy is no expert.
@mikeserv I asked an so mod if they wanted it, he said no. Note that the question you linked to is way more comprehensive and, most importantly, includes code. The latter is what makes it firmly on topic on SO.
@Ty221 Please don't post questions in chat like that. We all look at the questions as they come in, wait a while. If you've had no reply after a few hours or days, then you can ask for help here but not less than half an hour after posting!
thanks slm, Anthon, rahmu, Timo, Zelda. Always you all given more negative points.. If you know the answer share to the people who doesn't, don't discourage those people. You all are human being ?? — rajcoumar10 mins ago
@Braiam This has got to be the most interesting, enigmatic, and utterly confusing conversation I have ever attempted to follow here. Why should you guys need invisible ink and what does it have to do with kittens?
why not? You can even have 7 identical lines all perpendicular to each other (intersecting at a right angle) like in:
As I said, you can have some of them transparent or transparent green with a black background. That will make red lines as long as you put that on top of red background. You could also have transparent or green ink that turns red upon drying or exposed to air or via a reaction with the paper. There are plenty of ways to address those requirements.
@Braiam This one predates my being a mod. That was from March 12th, why does he care at this point. Flup answered him, the Q was still hard to follow and all we were asking him to do was include the output so we could help him is the irony.
I tend to think that unless the chunk of data is large enough to quantify significant processing/storage advantages by linking through it, then simply comparing explicit .csv files is probably the way to go.
This is not a opinion base question!
I want to know which of Linux distributions let me create and add my own codes to it? or a place to ask this question (I mean or where should I ask this?)
I know that linux is open source and so we can add things to it and ....
But I am not talking about th...