amenonsen

5 ms·

1.
by amenonsen 5y ago
Yes, isn't it great? As someone who knew that it's possible to reflash BIOS chips, but had no idea what equipment or process it would take to actually do so, I really appreciated the detailed explanation of the steps involved and
2.
by amenonsen 6y ago
It doesn't make sense to you because everything in the comment you're replying to is wrong. Neither log shipping (copying WAL files one by one) nor streaming replication (sending a stream of WAL) works by sending queries. WAL segm
3.
by amenonsen 6y ago
> In more recent versions there's "logical replication", which sort of "sends the queries" What it sends is not the queries, but a logical description of the changes to each row that were made by running the quer
4.
by amenonsen 6y ago
FYI: I'm the author of the linked article, and I added a link to the image after it was posted here.
5.
by amenonsen 6y ago
> Can you elaborate on how to identify the filename for a pipe in procfs or sysfs in a simple "echo hello | wc -c" example? You can see it under /proc/$pid/fd. For example, if you run "sleep 600|wc -c"
6.
by amenonsen 6y ago
Sorry, I was wrong about the BSDs. FreeBSD's pipe.2 manpage clearly says that pipes are still bidirectional. https://www.freebsd.org/cgi/man.cgi?query=pipe&sektion=2 That said, it is not based on socketpair an
7.
by amenonsen 6y ago
The slides are from 2011, not the code. Linux had pipes even in the v0.01 release from 1991, as the original article here mentions.
8.
by amenonsen 6y ago
> So do modern Linux pipes work bi-directionally? No, they do not (nor on the modern BSD kernels, as far as I can tell). The Linux pipe(7) manpage says (under "Portability notes"): «On some systems (but not Linux), pipes
9.
by amenonsen 6y ago
Yes, xv6 is great. The original post here already has a brief section on the code from xv6/pipe.c, which made for pleasant reading after I had just finished working my way through the 6E code. I also looked at the pipe implementation i
10.
by amenonsen 6y ago
That commit is a fascinating illustration of how pipes allow a model of inter-process interaction that goes beyond what you can do with temporary files, as well as how much further things have evolved from the days of the "very conserv
11.
by amenonsen 6y ago
Thanks for the link. That article seems to have a completely different focus (API rather than internals), but it's very nicely done.
12.
by amenonsen 6y ago
Thank you very much for digging this up, and to all the other commenters here for the useful references.
13.
by amenonsen 6y ago
> Manual formatters still send, even today, TTY Model 37 style input from 1969 to the manual pager Thanks, you are perfectly right. What I found charming was that the 3E pipe.2 manual page contains «word^H^H^H^H____» written out by hand
14.
by amenonsen 7y ago
https://groups.google.com/forum/#!msg/alt.sysadmin.recovery/...
15.
by amenonsen 7y ago
> Thanks for the awesome write-up. Glad you enjoyed it. :-) > I have considered doing something totally ridiculous like setting up a Raspberry Pi with a camera and machine vision software to watch the LED displays on these devices to
16.
by amenonsen 7y ago
(I'm this person.) It so happens that the solar inverter I'm using right now doesn't provide a data connection that I could use to shut down the computers cleanly. But I should also clarify that my long-running fsck isn'
17.
by amenonsen 8y ago
I find it a bit strange that I have to download the LibreOffice "built-in" help package separately.
18.
by amenonsen 9y ago
> If so, then maybe writing "Malayam" instead of "Malayalam" isn't too far wrong. No, it's very far wrong. (I'm a Malayali.)
19.
by amenonsen 10y ago
Why Blake rather than Keccak? (Maybe I missed some reason why it's a good idea to avoid the latter.)
20.
by amenonsen 10y ago
The big conceptual difference is that with WAL-E, all your backup code and configuration is on your Postgres server, whereas with Barman, it's all (or almost all) on your backup server. WAL-E stores backups in S3 (or S3-alikes), wherea
21.
by amenonsen 10y ago
Recent versions of Barman allow you to do WAL archiving without using an rsync/ssh-based archive_command. Instead, the backup server uses streaming replication via the standard pg_receivexlog command to build up a WAL archive. The big
22.
Understanding sudoers(5) syntax: a simple explanation (no EBNF)(toroid.org)
3 points by amenonsen 11y ago|1 comments
23.
by amenonsen 12y ago
When I first saw the page (opened along with a bunch of other tabs from HN links), with its "Timeout error!" balloon and "Service disruption" headline, I thought it was a fancy error page and hit reload. Oops.
24.
by amenonsen 12y ago
I am often dependent on a high-latency GPRS link, and the overhead of establishing a tunnel using OpenVPN or SSH (e.g. sshuttle) is prohibitive. OpenVPN is very likely to timeout before it can negotiate a TLS session. This is one of the maj
25.
by amenonsen 12y ago
As someone who didn't really know what they were doing, I used NaCl recently to write a program to tunnel packets over UDP. I started by reading the NaCl source and all the introductory material available—the web site, the two NaCl pap
26.
Show HN: Tappet, a tiny encrypted UDP tunnel using TweetNaCl(github.com)
3 points by amenonsen 12y ago|0 comments
27.
by amenonsen 13y ago
I remember the harrassment incidents, but I had never read anything she had written before. Thanks for the link. As a former dog owner, I found the dog example in this article especially evocative, because I've seen what an effort it c
28.
by amenonsen 14y ago
If I had been asked this question earlier, I might have said "It could be useful". Having tried this page, though, I agree with you. It was painful and distracting to step through the first example, and I can't imagine doing it for non-triv
29.
How do authors tell genuine translation offers from personalised SEO linkbait?(toroid.org)
1 points by amenonsen 14y ago|0 comments
30.
by amenonsen 14y ago
What did you think of the course textbook ("Exploiting Software", Hoglund & McGraw)? Is there a more modern alternative that you (or anyone) can recommend?

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