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@EnthusiastiC Commands run on a terminal are executed by a shell program, yes. Though it doesn't have to be Bash. For Linux based systems, it's usually Bash by default.

For largely historical reasons, I think.

Bash is the GNU shell project.

Can anyone hazard a guess what the following error might mean? It was obtained when trying to download a PDF file from a web server using wget -c.

> 2020-11-30 18:41:59 (8.48 KB/s) - Read error at byte 5260498/6250696 (Error decoding the received TLS packet.). Retrying.

Jeff Schaller

1:22 PM

Q: Why is bash standard on Linux?

Most recent Linux distributions include bash as default shell, although there are other, (arguably) better shells available. I'm trying to understand if this is some historical leftover that nobody wants to change, or are there some good reasons that make bash the first choice?

Faheem Mitha

I've not seen an error like this before. This is an Indian govt web site, www.sebi.gov.in.

My first thought is simply that the PDF file I am trying to download is corrupted.

If that is the case, trying to report it is almost certainly pointless.

wget has now tried several times, and it's errored out at exactly the same byte every time.

Might be bugs.debian.org/cgi-bin/bugreport.cgi?bug=744170 which was sent upstream, and which upstream closed as invalid, without an explanation I could see.

Stephen Kitt

@FaheemMitha does it happen all the time? It’s probably a different issue than #744170, because in your case the server has provided the content length. If it doesn’t happen consistently, it could just be corruption on the wire, although that would usually trigger a retry at the TCP level...

Faheem Mitha

@StephenKitt No, this is the first time I've seen this error, as far as I can recall. It's happening very consistently with this file, as I mentioned.

@StephenKitt Surely corruption on the wire would trigger restarts at random points, not the exact same point every time?

Stephen Kitt

ah sorry, yes

8 mins ago, by Faheem Mitha

wget has now tried several times, and it's errored out at exactly the same byte every time.

@FaheemMitha yes, it would

1 hour later…

Jeff Schaller

2:47 PM

maybe a bad sector on the sebi.gov.in hard drive :)

Faheem Mitha

3:27 PM

@JeffSchaller Would that explain such behavior?

Jeff Schaller

only if it was associated with a repeated whirring and clicking noise in the server room. I'm half (or more) joking. Stephen's pointed out that the web server thinks the file has more bytes, which would tend to rule out a corrupted (short) file. Have you tried restarting the wget after removing your partial download?

jesse_b

maybe they are using tape drives

Jeff Schaller

Insert Disc 2 and press Enter when ready ...

Faheem Mitha

@JeffSchaller No, I haven't. Do you think that might make a difference?

Jeff Schaller

3:49 PM

@FaheemMitha it'd be something I'd try; I haven't hit that particular situation, so I can't say for sure

Kusalananda

4:07 PM

@FaheemMitha It could be a corrupt source file, but it could also be a corrupt cache file, if there's something like a squid caching proxy between you and the server.

Stephen Kitt

ah yes, if the encoded TLS packet is cached, that would explain it

(is that possible? doesn’t TLS protect against replay attacks?)

Kusalananda

Hmm... I'm not the person to answer that. Don't know anything about TLS.

jesse_b

TLS is a car made by acura right?

Jeff Schaller

thought you were the local security expert?

Jan 11 '17 at 10:44, by Kusalananda

The "S" in IoT stands for "security".

Kusalananda

@JeffSchaller Not by a long shot :-)

Stephen Kitt

4:14 PM

@jesse_b isn’t that the TLX?

jesse_b

@StephenKitt I think there is both. There is the TL platform and different variants of it. The TL type S is badged TL-S I think

but IIRC the dash is very small so from a distance it just looks like TLS

Stephen Kitt

@jesse_b or TLs according to

Acura TL

The Acura TL is a compact executive / entry-level luxury car that was manufactured by Acura. It was introduced in 1995 to replace the Acura Vigor and was badged for the Japanese-market from 1996 to 2000 as the Honda Inspire and from 1996 to 2004 as the Honda Saber. The TL was Acura's best-selling model until it was outsold by the MDX in 2007. In 2005, it ranked as the second best-selling luxury sedan in the United States behind the BMW 3 Series, but sales have decreased since then. Four generations of the Acura TL were produced, with the final fourth generation TL premiering in 2008 as a 2009 model...

jesse_b

Jeff Schaller

the dash-s stands for "indistinguishable"?

Stephen Kitt

@jesse_b aha, evidence! let’s start an edit war on WP, it will make a change from edit wars and other shenanigans here

jesse_b

4:23 PM

I tried to edit a wiki page the other day and I couldn't figure out how to actually do it lol

3 hours later…

Michael Homer

7:49 PM

@FaheemMitha This is a network error and not related to the file contents. I don't know why it happens at the same point each time. It's a stream cipher with a session key and the blocks are not cached. I don't know of anything you can do, but attempting the connection from somewhere else with a different likely network path to the source might help. I would also try making a HEAD request (or just a GET but reading the headers) to see what the claimed Content-Length is.

jesse_b

Does anyone have any recommendations for wireless APs with built in roaming capabilities?

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