Ask Ubuntu General Room

Zanna

1:41 AM

@Daniil oh no, sounds like a hardware failure :(

user435118

7:28 AM

@Zanna Anything I can do to diagnose the issue?

Zanna

7:54 AM

@Daniil are you not even getting the BIOS/UEFI shell coming up?

tbh I have no idea - I would just take my laptop to a repair place if it refused to wake up

the folks over on Super User would have some tips

user435118

Nope, nothing

user435118

I can't confirm that it's charging even

user435118

Ok, I'll ask there

user435118

Thanks

Zanna

8:47 AM

good luck

Revetahw says Reinstate Monica

@Zanna Yeah, well at least vegetarian! I am also vegetarian and love the fact that there are vegetarian restaurants everywhere and all products are marked with green circles if they are vegetarian! Lots of dairy in India though, right?

Zanna

loads yeah, but at least there are a whole bunch of things you can order. In UK there are whole regions where you have to beg the kitchen for a plain baked potato (without butter) XD

Zanna

9:20 AM

These days we can't eat out anyway, but I just love being able to get fresh coconut. And after about 9 months of tinkering I figured out how to make amazing vegan curd/yogurt at home (milk/cream is easy, and for butter coconut oil + olive oil hits the spot), so I'm well on the way to being the best cook in... well my house at least

Ubuntu Questions on U&L

10:06 AM

0

Q: kill processes shown by sudo fuser filtered by COMMAND column

using the following line I have been able to see processes that use the GPU some of which are mentioned python under the COMMAND column. sudo fuser -v /dev/nvidia* which prints: USER PID ACCESS COMMAND /dev/nvidia0: root 1197 F...m Xorg ...

Ubuntu Questions on U&L

11:45 AM

0

Q: Carthage installation on ubuntu not work

use : Ubuntu 18.04.4 LTS , Homebrew 2.4.9 Homebrew/linuxbrew-core (git revision d62da; last commit 2020-07-29) I am trying to install 'carthage' to ubuntu machine using brew Tried : brew install carthage currently i am getting following and carthage commands are not working shehan@shehan-Inspiro...

linux ubuntu homebrew

Ubuntu Questions on U&L

1:00 PM

1

Q: Where can the newer Debian/Ubuntu EFI/UEFI firmware certificates be downloaded?

Both Debian and Ubuntu certificates were added to the dbx EFI/UEFI firmware database because of the BootHole vulnerability, and the two major linux distros are now forced to use different private keys in order to sign software they provide. But there's no information on where the new certificates...

debian ubuntu uefi

Eliah Kagan

2:11 PM

What topics are you thinking of covering for that "classroom"?

Zanna

2:39 PM

@EliahKagan I'm glad you asked me that as I have only thought about it so far

Eliah Kagan

What topics in file permissions do you consider to be basic? Also, what topics in command-line usage do you consider suitable for a very beginning level introduction?

(This is really just a restatement of the question. :)

Zanna

On my list to possibly cover
the prompt (slightly)
finding your way around with cd & ls
mv & cp
making directories and files and deleting them
getting information on commands (type, help, man...)
searching for files
reading and editing files
file and directory permissions (for user, group and others, setuid and setgid)
getting information on files (stat)
chmod and chown
executing files
globbing and other wildcards
some basic handy expansions like with {...} and $
quoting
...

Eliah Kagan

@EliahKagan *beginner level

Zanna

@EliahKagan sorry I was typing

Eliah Kagan

I'm not sure what you're sorry for but if you are talking about the small delay that is definitely no problem. :)

Zanna

2:49 PM

@EliahKagan ooh a smiley end parenthesis

Eliah Kagan

Yes.

Zanna

it might be that nobody wants to do my classroom, or that people already know more than me, in which case something else interesting may happen instead

for example, @Daniil commented encouragingly on my "offer" to do an "intro to command line" classroom, but I feel that in 3 months he will be the one giving that lesson :D

Eliah Kagan

Assuming you're covering setuid and setguid, should the sticky (restricted deletion) bit be covered as well? People are constantly confusing s and t.

@Zanna There will probably be more new users by then too though.

Zanna

@EliahKagan yes, but I myself am confused about whether when and how the sticky bit is used

@EliahKagan (:

Eliah Kagan

@Zanna Normally, anyone with write access to a directory can delete files in the directory, irrespective of those files' own ownership and permissions. When this is not desired, such as for /tmp, the sticky bit (i.e., the restricted deletion bit) can be set on the directory.

user435118

2:59 PM

@Zanna If I can get my Ubuntu laptop fixed :)

Eliah Kagan

:)

@Zanna When you say "other wildcards" what do you mean?

I feel like I should've asked that in AUGR and that it would be best to move the messages there. Unlike most technical discussions that start here and (if they get long enough) get moved to the Island, this is about an event likely of interest to a substantial portion of Ask Ubuntu users.

Also, since messages are rarely moved to AUGR, waiting to move them until they are high volume could potentially upset some folks (since the moved messages would become interleaved with other conversation, sort of like how Smokey reports used to be back when Smokey was in AUGR). Whereas continuing it there, even with many messages, is something I think everybody is likely to be fine with. (Since people can use chat replies to have separate concurrent conversations.)

Is there any reason I should refrain from doing that? If not, I'll move them.

@Zanna I suggest covering less. I mean the command, not that fewer topics should be covered. :)

Many new users are unaware of it, and man uses it (by default) so if people are using man then they have to learn how to use it anyway. It's also very handy when used together with bash's help builtin, and it is a good way to introduce pipelines.

Though perhaps that was already part of your plan, since it falls under reading files.

Zanna

3:28 PM

@EliahKagan lol yes that would be in reading files

@EliahKagan I'm sure that won't be the only thing you'll be getting a credit for in my class :D

@EliahKagan I mean ? and character classes, but maybe I am not naming them right

@EliahKagan good idea to move them!

@Daniil fingers crossed!

Eliah Kagan

3:50 PM

← 31 messages moved from Raiders of the Lost Downboat

@Zanna Well, *, ?, and character classes are all part of globbing.

I've heard * and ? called wildcards and character classes not called wildcards, but I don't know if there's actually any accepted definition of a wildcard in a *nix shell context. I'd consider wildcards to be no broader of a category than globbing.

Do you plan to cover redirection and pipelines?

Zanna

@EliahKagan yes because those things are very useful

Eliah Kagan

Indeed. Another benefit of covering them might be that people are constantly confusing them with one another.

Zanna

haha to potentially disastrous effect

the main reason for mentioning chmod and chown would probably be to point out that if you think you should be using them, you should probably be using sudo instead...

@EliahKagan maybe I should drop that since clearly I don't even know the name of the topic XD

Eliah Kagan

4:17 PM

That only seems like argument for not adding the name of the topic as its own separate topic. :)

Anyway it could get very long if one were to cover globbing, how to talk about globbing, how to talk about talking about globbing, how to talk about talking about talking about globbing, and so forth.

Zanna

hahaha

Eliah Kagan

I guess another question is, what need not be covered?

I don't mean to suggest making a list of things not to cover even if people ask about them. But thinking about what need not be covered may help to illuminate what is important.

I mean, it may help to illuminate the extent to which potentially very broad and deep topics should be covered.

For example, I suggest against covering IFS and ACLs except perhaps to mention that they exist, unless someone asks.

It might be worth mentioning ACLs so people know what the + means in permissions strings from ls like drwxrws---+. Maybe.

There's a widespread misconception that IFS affects how commands are parsed. I believe a lot of people think, for example, that if , is in IFS then the literal command echo foo,bar (which contains no expansions) prints foo bar instead of foo,bar, which is not the case.

People tend to think that you can store the old value of IFS with a command like oldIFS="$IFS" and then restore it with IFS="$oldIFS", which does not always work because when IFS is unset the shell behaves differently from when it is set to an empty string. (Unset IFS is like having it set to the default value of a space, a tab, and a newline. Empty IFS disables field splitting, a.k.a. word splitting in the terminology bash uses.)

Zanna

4:40 PM

I find the whole thing very confusing, so I have no plan to cover it, and if anyone were to ask me about it, I would set them a homework of researching it

Eliah Kagan

IFS? Or ACLs?

Zanna

I was not planning to talk about ACLs or extended attributes, though I thought they might get mentioned in passing

@EliahKagan IFS

I don't think ACLs are confusing

Eliah Kagan

It occurs to me that there may be a good reason to cover ACLs: people tend not to know about them.

Zanna

well my intention is to prepare a lot more stuff than I expect to get through in order to allow for whatever sidetracking seems warranted

so I would probably prepare something for ACLs

afterwards I can distribute whatever material I create, including whatever was not used

Eliah Kagan

4:57 PM

Does the material include links to relevant questions on the site?

I'm not saying it needs to or anything.

I'm just wondering how similar what you're doing is to what would need to be done to expand and improve the quality of some of our most active tags' tag wikis.

*is what would need

Never mind, I said it right the first time, my bad.

Zanna

5:50 PM

@EliahKagan the tag wiki project also totally came to my mind

currently the material is hypothetical

but it will almost certainly include many links to stuff on our site

Ubuntu Questions on U&L

6:28 PM

0

Q: Setup service to run software

I have a problem with launching an application like a service. I need to set up this application to startup with ubuntu and I decided to make a service. I can run this application via terminal using sudo and it works fine. But service doesn't start fully. In logs I can see: SysDirRead_[188]: stat...

ubuntu systemd sudo

Ubuntu Questions on U&L

8:36 PM

0

Q: Group files that share same header then concatenate them

I'm using bash and my issue is the following: I have dozens of .TXT files in a certain folder. As far as I know, all of them have a header (I believe every header holds on 1 line but not 100% sure) However, they do not necessary share the same header. Five files might have the same header while a...

bash ubuntu

code_dredd

11:26 PM

Hey all, I made a silly mistake that I've not been able to revert yet. I'm using Kubuntu, and the Clipboard that shows up in the System Tray has a button to "Clear history". Normally, it prompts if you really want to clear the history, with an option to not ask you again.

My mistake was a misclick. I wanted it to not ask again, but I misclicked the "No" (to not clear history) instead of the "Yes" (to actually have the history cleared).

Now, the button to clear history is effectively useless because it refuses to clear it and I've not found how to undo this misclick mistake.

Would appreciate if someone can tag me with a lead or help on this, as maybe other people have encountered this before me.

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