/dev/chat

@Chrislast - it will in the sense that all the key combos are displayed in the pull down menus so you can begin to build the mental palace of associating a known command in the menus with the key combo

Chris last

5:07 PM

oh i didnt know it was like

that

slm

pull down Edit -> Select All === ggVG

for example

Chris last

is ggVG a command in VI

terdon

@derobert be nice... It only takes ~7

slm

vim

Chris last

vim has diff commands... -.-

derobert

5:09 PM

@terdon He's a beginner! He won't have the years of stretching required to pull it off with 7.

slm

it has a super set of vi commands

terdon

Anyway, @Chrislast you're quite right, vim is just weird. You actually need to enter a different mode just to be able to edit a file. What's the point of that in a file editor?

Just use emacs like normal people

Chris last

haha

Sukminder

One has to be stubborn with vim in the beginning. But when you get the flow, most people (I guess) don't look back. View a couple of videos for inspiration ;)

terdon

In case you haven't noticed, this is one of the BIG WARS on *nix :)

derobert

5:11 PM

See, now you've found the channel's emacs user!

slm

In vi I'd use %y a

terdon

All competent/reasonable/intelligent/pleasant/ethical people use emacs

some weirdos use vim :)

slm

% is everything, y is yank, a is slot it get's saved into

Chris last

yes, i believe i learned yank

yy

terdon

(Ctrl+Y) on emacs == much simpler

slm

5:12 PM

yes yy yanks the current line

derobert

you can combine y with other motions too, to yank different things

slm

notice i'm ignoring the emacs lovers/vim haters 8-)

vim users hold them selves to a higher standard 8-)

terdon

Joking aside, once you start getting into either one of vim or emacs and configure it to suit you, you'll never want to switch. Ever.

@slm prrrrbbbbbtttttthhh

slm

depends, i used to work at Kodak and used xemacs to do hardware design

Chris last

i think the people who made linux should have come together and decided to not make things inconsistent

slm

5:13 PM

we wrote VHDL in xemacs

the plugins were superior to anything available in vim

terdon

Well, the people (person) who started GNU actually wrote emacs

It's the vim people who break consistency ;)

Chris last

haha

slm

there is no single person, hence why there is so much choice

terdon

Seriously though, this has nothing to do with Linux. They are independent programs, why should they be consistent?

derobert

122

Q: vim vs. emacs... and no, this is not a flame war

How would you compare these editors? What are the pros and cons of each? [note] This is not meant to be answered by those who "hate one and love another" or those who haven't used both.

terdon

5:15 PM

Would you expect notepad++ to be consistent with sublime?

slm

choice isn't bad, you just have to work out your own path through it which lots of ppl don't like/want to do. Hence Apples success, ppl are sheep and want to be told what to like and how to work.

Chris last

im talking about the basic commands in linux not the editors

slm

so am i

derobert

@Chrislast Which basic commands are you finding inconsistent?

slm

there are a multitudes of Unixes

terdon

5:16 PM

@Chrislast Those are extremely consistent

slm

GNU tools can straddle across most of them

terdon

@derobert that diagram made me laugh out loud :)

derobert

@terdon Yeah, you'll have to thank @MichaelMrozek for that one

Chris last

i can point a command out but there are some Options corresponding to a command and an option similar or exactly like that option corresponds to another command but the option is different

slm

@derobert - that's mike's apt cow Q

Chris last

5:18 PM

i cant*

slm

when learning unix there are basic skills that a noob should focus on and not try to learn everything

man pages have info

terdon

@Chrislast well, yes. Are shortcuts the same accross all windows programs? Would you expect them to be?

slm

you can search them using man -k <blah>

Chris last

idk, the learning curve would be less of a curve

slm

<blah> is a keyword

derobert

5:19 PM

@Chrislast Yeah, there are some options where are inconsistent. Much of that is due to Unix's long history, and different people writing different commands...

E.g., -v often means verbose, but not always!

terdon

A lot of options are (almost) universal, for example --verbose and --help and --version

derobert

grep -v ← surely not verbose

terdon

As @derobert said though, you have to remember that these are different programs written by different people

Chris last

i know, which is why they should have banded together

terdon

@derobert i) I said (alsmost) and ii) I never said -v, I used --verbose

Chris last

5:20 PM

like normal people in a project would

terdon

It is not a project world

compare it to Office and Firefox

they are completely independent

derobert

@Chrislast These commands were invented over the course of several decades...

Chris last

i see..

terdon

also, the letters chosen for options tend to be intuitive. It's just that different programs do different things

derobert

@terdon (that wasn't a response to your comment, it was a continuation of my example, sorry for the confusion)

Chris last

5:22 PM

well.. in the end of the day, linux is free and windows/mac isnt

Michael Mrozek

@terdon I'll never forgive chmod for -r

terdon

There is that. But it is honestly much more ordered than the win world. You'll see once you get to know it

Michael Mrozek

"Hey, chmod, do this thing recursively" "What's that? You want me to remove read access for everyone? I'm on it"

3

Chris last

haha

terdon

10

A: find command in linux

The reason it doesn't work is because find has no -r option. While it is true that for many programs the -r flag means 'recursive', this is not the case for all and it is not the case for find. The job of find is to search for files and directories, it is not very often that you don't want it to ...

:)

The thing is that different commands do different things. It is intuitive that -r means reverse in sort for example

also that -r means recursive in cp

Chris last

5:24 PM

actually even i would know that

terdon

(chmod I can't defend, agreed)

Chris last

i also know chmod in octal, owned

derobert

@terdon Indeed. And it would be easy enough to require the a in front...

terdon

@MichaelMrozek where did you get that great diagram for the emacs/vim question?

Damn, rep cap already :(

Michael Mrozek

@terdon It's fairly common, I don't know where it's originally from

terdon

5:26 PM

Is great :)

And good to have another reasonable human being here, I've been surrounded by vimmers

derobert

Michael Mrozek

I think I would not hate vim if I ever bothered to learn it, but I'm plenty fast enough with emacs and much prefer modifier keys to modes

derobert

@terdon Appears we have 2 v. 2 here, so the channel is in perfect balance.

terdon

I don't hate it, I just don't get it. Freely admit it's a great editor of course.

@derobert heh nice, do I need to post the classic xkcd one?

derobert

@terdon I assume everyone has seen it, but as long as we're having comic strip fun time...

terdon

5:30 PM

Real programmers set the universal constants at the start such that the universe evolves to contain the disk with the data they want.

Michael Mrozek

Somewhere I saw a really good explanation of vim that made me hate it less

terdon

You know the emacs guys have actually implemented that?

Alt+X butterfly

Michael Mrozek

Oh, SO of course:

2870

A: What is your most productive shortcut with Vim?

Your problem with Vim is that you don't grok vi. You mention cutting with yy and complain that you almost never want to cut whole lines. In fact programmers, editing source code, very often want to work on whole lines, ranges of lines and blocks of code. However, yy is only one of many way to...

derobert

Wow, +2870...

terdon

and wow, that's a good answer! On SO! Nice and long and detailed. Even longer than @slm's!

derobert

5:33 PM

SO has plenty of good answers. Like the classic:

4431

A: RegEx match open tags except XHTML self-contained tags

You can't parse [X]HTML with regex. Because HTML can't be parsed by regex. Regex is not a tool that can be used to correctly parse HTML. As I have answered in HTML-and-regex questions here so many times before, the use of regex will not allow you to consume HTML. Regular expressions are a tool th...

"TO͇̹̺ͅƝ̴ȳ̳ TH̘Ë͖́̉ ͠P̯͍̭O̚N̐Y̡ H̸̡̪̯ͨ͊̽̅̾̎Ȩ̬̩̾͛ͪ̈́̀́͘ ̶̧̨̱̹̭̯ͧ̾ͬC̷̙̲̝͖ͭ̏ͥͮ͟Oͮ͏̮̪̝͍M̲̖͊̒ͪͩͬ̚̚͜Ȇ̴̟̟͙̞ͩ͌͝S̨̥̫͎̭ͯ̿̔̀ͅ"

terdon

Yeah, that one I know. Great answer but not very informative :)

Though the unicode knowledge is impressive I'll grant you

derobert

LOL, yeah. I'd argue it is pretty informative, it just wishes to inform you of one point only—use a #!(#*) HTML parser.

terdon

> Even Jon Skeet cannot parse HTML using regular expressions.

lol

The SO skeet cult is funny

Any of you guys have any experience using Perl for CGI scripts?

derobert

@terdon Yeah.

terdon

I have a script that is getting data from a database

slm

5:38 PM

Yeah windows is def. better:
UNIX: umount /mnt
WIND: net use \\server\share /delete

terdon

some of my queries can take a long time, so I want to show a placeholder

slm

@terdon I just have a lot to say....

terdon

however, despite calling the placeholder function before the mysql one, the placeholder is not displayed immediately

derobert

@terdon flush stdout

terdon

@slm that was not a critique, more like a compliment. SO answers tend to be too short

@derobert tried print STDOUT

and $|=1

no difference

both of those should flush right?

slm

5:39 PM

askjonskeet.com

Braiam

> how did you write bind9=<something>

derobert

$|=1 ought to... I don't think print STDOUT will

Braiam

I believe with the keyboard, typing letters, no??

derobert

(at least, $|=1 will unless you've selected a different filehandle)

terdon

no, I'm printing straight to STDOUT

and yes, I remember solving things by explicitly using print STDOUT instead of print alone

derobert

5:41 PM

selecting a filehandle—the one $| affects—is done with select....

terdon

hang on, I'll get a minimal code example

slm

@terdon I do, what's up?

derobert

but if you've got a reasonably modern perl, you can use STDOUT->autoflush(1). Even if you haven't done a use IO::Handle.

terdon

I have a script that is getting data from a database, some of my queries can take a long time, so I want to show a placeholder. However, despite calling the placeholder function before the mysql one, the placeholder is not displayed immediately

it works fine if I run a minimal example on the command line but not if I'm displaying to the browser

slm

@derobert - yeah that Q was getting me annoyed about Perl not being ubiq. BTW. Was a total waste of time discussion, then ppl had to dig up ancient ass versions of boxes with Bash just to try and show me up....

terdon

5:44 PM

Can't locate object method "autoflush" via package "IO::Handle" at /var/www_8080/PoGo/cgi-bin/pogo.pl line 89.

I guess the perl version ain't modern enough

@slm sorry about that, I helped

derobert

@terdon that is a weird error to get

terdon

I thought UNIX without Perl was impossible and Gilles set me straight so I mentioned AIX

slm

@terdon - yeah i get a little annoyed when ppl want to mince answers to death in the comments

derobert

Maybe it means you need a use IO::Handle

terdon

OK, I'll try that

@slm it was not meant to be critical, I was thinking more along the lines that as far as I know, only embedded and AIX might not have Perl so, not a problem

derobert

5:47 PM

This way, we can be sure that its actually in autoflush mode. You could also do an explicit STDOUT->flush if you don't want to turn on autoflush

slm

@terdon - yeah i didn't think you were, you were just qualifying it, but dave and someone else wouldn't let it go

terdon

@derobert with use IO::handle I get no error but no change in behavior either

derobert

I wonder, do you have some sort of other buffering enabled? Maybe in Apache?

e.g., maybe you've got Apache buffering to do mod_gzip?

slm

are you using mod_deflate in apache?

derobert

sorry, yeah, @slm has the right name for the module

terdon

5:50 PM

Hang on, I'll check

slm

you should be able to just disable it in the httpd.conf and restart

comment it out

terdon

nope

http.conf :

slm

do you see anything in apache's error log?

terdon

<Directory "/var/www_8080/PoGo/cgi-bin/">
AllowOverride None
Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
AddHandler cgi-script .cgi .pl .php
Order allow,deny
Allow from all
</Directory>

derobert

@terdon it could be elsewhere in the apache config

terdon

5:51 PM

@slm nope, it works find just takes a while to show the placeholder instead of going directly

@derobert no mod_ in apache.conf either

grep mod_ /etc/apache2/apache2.conf

derobert

There isn't in mine either, it's in /etc/apache2/mods-enabled/

terdon

Ah, hang on then

derobert

I'd try grep -r DEFLATE /etc/apache2

terdon

/etc/apache2/mods-available/deflate.conf:          AddOutputFilterByType DEFLATE text/html text/plain text/xml
/etc/apache2/mods-available/deflate.conf:          AddOutputFilterByType DEFLATE text/css
/etc/apache2/mods-available/deflate.conf:          AddOutputFilterByType DEFLATE application/x-javascript application/javascript application/ecmascript
/etc/apache2/mods-available/deflate.conf:          AddOutputFilterByType DEFLATE application/rss+xml
/etc/apache2/mods-enabled/deflate.conf:          AddOutputFilterByType DEFLATE text/html text/plain text/xml

derobert

Or just fire up Wireshark and see if the response is compressed :-P

terdon

5:55 PM

Working on a remote VM I have to tunnel to

derobert

So, it looks like you're using DEFLATE

terdon

yup

I should remove the link from mods-enabled right?

derobert

a2dismod

or remove the links, but a2dismod is easier

terdon

well, I removed the link

and it works! Thanks @slm @derobert

what exactly does that do anyway?

derobert

It compresses HTTP responses, saving bandwidth and speeding things up

terdon

5:57 PM

shit, that's a good idea...

Some of the queries can be quite long.

I mean return large amounts of data. I guess there is no way of activating it selectively?

derobert

you can just set no-gzip for that CGI

terdon

Yeah, I'd like to perhaps compress the actual data returned, just not the placeholder

I guess I'd have to do that in the CGI script itself

derobert

Or alternatively, make your progress message longer, to guarantee a buffer flush

terdon

Well, the progress message is a new page that will be refreshed to show the output

derobert

You could also generate your progress message in JavaScript, but that's probably more work

terdon

5:59 PM

it is in javascript, I just need to load the page as soon as the submit is clicked

never mind, it is more important to show the user that something is happening, I can live with this

derobert

@terdon Then you could just make it a different URL, and then apache could match it and disable compression only for the status page

terdon

Ah, that's interesting

derobert

httpd.apache.org/docs/2.2/mod/mod_deflate.html is the documentation on mod_deflate, btw

terdon

it is a different URL already

Cool, thanks I'll go read that

PHP Deprecated:  Comments starting with '#' are deprecated in /etc/php5/apache2/conf.d/mcrypt.ini on line 1 in Unknown on line 0

What should I use? /* */? // ?

/* works

derobert

6:16 PM

I think // works too

terdon

in php yes, I just wasn't sure about mcrypt.ini

derobert

that's a php.ini fragment, so whatever works in php.ini should be fine there

JohnMerlino

Anyone know what an ELF interpreter is? I came across this on man page of /proc

terdon

ELF == Executable and Linkable Format

I guess it is the part of the kernel that deals with running executables

Executable and Linkable Format

In computing, the Executable and Linkable Format (ELF, formerly called Extensible Linking Format) is a common standard file format for executables, object code, shared libraries, and core dumps. First published in the System V Application Binary Interface specification, and later in the Tool Interface Standard, it was quickly accepted among different vendors of Unix systems. In 1999 it was chosen as the standard binary file format for Unix and Unix-like systems on x86 by the 86open project. ELF is flexible and extensible by design, and it is not bound to any particular processor or arc...

JohnMerlino

ok I guess /proc/[number]/auxv isn't really useful in finding out about a pid

That auxv seems to be compiled code

terdon

6:28 PM

What are you actually trying to do?

JohnMerlino

@terdon my serial port shows its busy when I try to start gammu-smsd. So I ran fuser on it: fuser -m -u /dev/ttyS0. It returned this: /dev/ttyS0: 21624(guarddoggps). So I go to /proc/21624/status

And this is the output I get from status:

Name:	dropbox
State:	S (sleeping)
Tgid:	21624
Pid:	21624
PPid:	1
TracerPid:	0
Uid:	1001	1001	1001	1001
Gid:	1001	1001	1001	1001
FDSize:	64
Groups:	5 27 1001 5004
VmPeak:	  873732 kB
VmSize:	  806040 kB
VmLck:	       0 kB
VmHWM:	  207668 kB
VmRSS:	  132272 kB
VmData:	  547820 kB
VmStk:	     160 kB
VmExe:	    3524 kB
VmLib:	   29660 kB
VmPTE:	    1244 kB
Threads:	21
SigQ:	0/16382
SigPnd:	0000000000000000
ShdPnd:	0000000000000000
SigBlk:	0000000000000000
SigIgn:	0000000001001000
SigCgt:	00000001800004c8

But I would like to know exactly what that process is, and I am on the man page reading about its subdirectories

terdon

Isn't it dropbox?

JohnMerlino

it looks like it, but if it was really dropbox, why would it be using that serial port?

I have a modem attached to that serial port

terdon

no idea

is pgrep 21624 dropbox?

Perhaps dropbox thinks it is connecting via modem?

Don't really know though. Let's call in the heavyweights @slm @derobert any ideas?

JohnMerlino

"pgrep 21624" doesn't return anything

terdon

6:35 PM

weird, that seems to be the PID.

JohnMerlino

yet fuser says it's using it

terdon

Sorry, really don't know.

JohnMerlino

$ fuser -m -u /dev/ttyS0
/dev/ttyS0: 21624(guarddoggps)

terdon

The status is sleeping so maybe it is hung. Does this persist after a reboot? Or if you manually kill dropbox?

Sukminder

@JohnMerlino: Kernel loads ELF interpreter -> ELF interpreter loads libarires -> … greek0.net/elf.html , nixos.org/patchelf.html , lehman.cuny.edu/cgi-bin/man-cgi?elfdump+1 …

JohnMerlino

6:37 PM

@terdon you think I should run "kill -9 21624"?

terdon

I think I don't know enough to say :)

slm

sorry catching up

went away to work on my day job stuff

terdon

Ah, here's a real sysadmin

slm

are you just trying to find out what's using /dev/ttyS0?

terdon

(I just sang that to the tune of the Beatle's nowehere man :)

slm

6:38 PM

ah

ha

wife's a huge beatles fan

JohnMerlino

@slm yeah I am trying to use /dev/ttyS0 with gammu-smsd but gammus-smsd doesn't start because it says that the serial port is busy

Braiam

I remember a Debian guide to clean unused dependencies... but the google fo is failing to find it again... maybe I was looking for other thing, anyone knows about it?

slm

I'd try using lsof and see what has /dev/ttyS0 in use

Sukminder

A PID can be "invisible" – typically subthreads. Won't even come up in ls -la /proc , but you can cd into it as in cd /proc/SOME_invisible_pid

JohnMerlino

@slm lsof is more reliable than fuser?

slm

6:40 PM

i would say so

you need to be root to run it to see process by other userids

Sukminder

Ugh. Blender Rendering is really slowing down my system …

Need a farm

slm

@Sukminder - get another system to run that on remotely

JohnMerlino

I ran "lsof /dev/ttyS0" and it didn't give me anything

This is the actual error log of gammu:

0

Q: Gammu: "Device or resource busy"

I am successfully able to send myself an SMS message via minicom on the serial port /dev/ttyS0: at+CMGS=954xxxxxxx > Hello World Again +CMGS: 8 However, I have the following configuration for gammu-smsd: [gammu] port = /dev/ttyS0 connection = at115200 [smsd] service = pgsql logfile = syslog ...

gammu

slm

do you have some sort of gps thing on this box?

JohnMerlino

@slm yes I have a gsm modem

slm

6:43 PM

guarddog appears to have the device busy from the previous fuser output

you own that process?

JohnMerlino

yeah I am sudo user

If killing that pid I mentioned above, kills dropbox and allows me to run gammu-smsd, then I will do it

Sukminder

@slm: Yes. I really need to get that set up. AFAIK it is even a builtin/plugin for it now …

slm

do a sudo lsof | grep ttyS0

JohnMerlino

@slm that doesn't give any output

slm

@Sukminder - yes there is a builtin now, much easier than in the past

@JohnMerlino - what about sudo lsof | grep 21624

JohnMerlino

6:46 PM

@slm that gave a ton of output

slm

is it showing the process name by chance to the left?

guarddog...

JohnMerlino

yes I don't want to copy all of it into here because it's huge, but this is what I get for the programs running: zsh, lsof, grep, lsof, and 150+ dropbox

it seems like over 100 dropbox instances are part of that output

The lsof are running from root (since I used sudo with that command) and everything else is run with guarddog user

slm

k, you can just look for that pid, lsof -p 21624

should return the single process with that pid, and all the files it has opened

JohnMerlino

pastebin.com/M3SecTVa

slm

curious that ttyS0 doesn't show up

JohnMerlino

6:52 PM

When I run "sudo lsof -p 21624", i get all dropbox on left side

slm

oh ok, so guarddoggps is a your username

JohnMerlino

yes

when I run sudo lsof -p 21624, this is what I see: pastebin.com/mwpFtZRb

slm

I'd try stopping dropbox and see if you can access it

try this too: sudo lsof /dev/ttyS*

If you want to see what the working directory is of a process, BTW, it's pwdx <PID>

JohnMerlino

$ sudo lsof /dev/ttyS*
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
screen 23520 root 6u CHR 4,64 0t0 1421 /dev/ttyS0

That's interesting, it thinks that the screen program is using ttyS0? I remember trying to access that port with screen before, but now I use minicom

Chris last

anyone want to help me with a problem, i took a screenshot of it

Braiam

7:06 PM

there is a question about what are package lists of a package manager?

terdon

@Chrislast try me

@Braiam no idea

Chris last

here is the question: postimg.org/image/npexaw0ib

by the way that is a secure shell client if you're wondering

Braiam

@Chrislast you gotta be kidding me...

terdon

@Chrislast cp ../cambridge/security/parking parking2

Chris last

i need to name it parking2 dude

how am i kidding you @Braiam

terdon

7:09 PM

cp ../cambridge/security/parking parking2

Chris last

ok ill try that

Braiam

lol why is not the same ./filename than just filename?

Chris last

fuck

so.. i sent an email regarding this to my professor for no reason

now he wil think im an idiot

Braiam

no, still, the test is flawed

Chris last

i think he wanted the shortest possible answer

i think it made mention of that

terdon

7:10 PM

won't get much shorter than that

Chris last

yeah i know, that was the correct answer terdon

terdon

The ./ is always implied

Chris last

yeah

uh.. what is a relative-to-home pathname again

oh is it ~/blablabla

yeah it is nvm

Braiam

did I miss something askubuntu.com/q/355947/169736 ?

terdon

7:42 PM

@Braiam looks good. You might want to link to the official reference:

debian.org/doc/manuals/debian-reference/ch02.en.htm

Braiam

@terdon actually, I did from my head everything :P

@terdon oh boy, 404 there

terdon

where? the debian page? I just clicked on the link I posted and it worked fine

Braiam

you missed the l at the end of html

terdon

shit, you're right, I just clicked and saw that a debian page loaded, I missed the fact that it was a 404 :)

debian.org/doc/manuals/debian-reference/ch02.en.html

derobert

8:36 PM

@terdon ummm... at risk of having not read the chat log fully... man fuser, look up what -m means.

terdon

:) slm told him to go for lsof

all I knew is that serial ports are well outside my comfort zone so I called in the pros.

Braiam

all I know about serial ports is that that was the port I used to connect the mouse... :S

derobert

fuser -m tells you anything using that mount

so of course a lot of things were using /dev

@Chrislast That's not the shortest possible—you could use * to get much shorter.

cp ../c*/s*/p* parking2 is much shorter

@Chrislast I'm going to have to agree that your exam appears broken. Or at least very lazily implemented.

slm

@derobert - I didn't look back either to see how he ran fuser

I came into the conv. mid stream

been a bit busy at work so was 1/2 reading today

derobert

but anyway, it looks like lsof gave the answer...

so I'm curious why the AU question is still open

slm

8:51 PM

didn't look at that either

derobert

2 hours ago, by JohnMerlino

$ sudo lsof /dev/ttyS*
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
screen 23520 root 6u CHR 4,64 0t0 1421 /dev/ttyS0

slm

yeah I don't know what he was doing with screen

he needs to just kill that to free the port

derobert

@JohnMerlino considering the lsof output above... should your question on AU still be open?

slm

@derobert - answer his lsof Q here

derobert

@slm Ah, found that one—will answer it

JohnMerlino

8:53 PM

@derobert the question on main is a little different, it's about comparing lsof to fuser and why they give different output

slm

@JohnMerlino - the -m switch is the issue as @derobert stated

@JohnMerlino - I hadn't scrolled back enough to see that you used that switch

       -m     name specifies a file on a mounted file system or a block device that is mounted. All processes accessing files on that file system are listed.  If a directory file is specified, it is automatically changed to name/. to use any file system that might be mounted on that directory.

man page of fuser

so it shows you all the processes that are accessing the mount associated with /dev/ttyS0 which is everything

JohnMerlino

ok thanks

slm

sorry I should've scrolled up and read it more thoroughly, I would've caught that normally, been a bit busy at work today 8-)

JohnMerlino

@slm so really it's gnu screen that is the real culprit here?

slm

thanks @derobert

yeah

just kill it

pkill screen

derobert

8:56 PM

well, I'd exit your screen session normally instead of killing it, but...

slm

the fuser -m is a red herring since the switch is off

or that

picky picky

he tried to connect to the serial port with screen so it's likely not anyway

screen -dr

JohnMerlino

ok I did some more investigation as to why that screen session is even using that serial port, and it looks like someone started the screen session and was running "tail -f" continuously on a log file.

slm

I do have a day job too 8-)

JohnMerlino

that screen session was started as root too

slm

you can ctrl-c it and then exit the screen to close it

OK, back to work...

derobert

8:59 PM

screen is able to handle serial ports, sort of like minicom. This would be screen less-known feature #4,234,234, I believe.

(Also, honestly, I'm surprised if your fuser -um output only consisted of one process, not the many as on my system... but I guess most of mine are xterms and so on, so maybe you don't have many of those running)

JohnMerlino

@derobert when I ran fuser as root, a ton of stuff came up

but when I ran it as regular user, only one thing came up

that was another thing too, lsof was running with sudo, and fuser without sudo

derobert

Yeah. Depending on system config, you may not be able to see which files other users have open.

If you think of, for example, a large multi-user system, where a bunch of people who may not know each other are logged in, there is a privacy issue if you can see each others' open files.

@JohnMerlino so did that fix your Gammu problem? If so, please post an answer to your question on AU.

JohnMerlino

9:48 PM

@derobert I killed that screen session: screen -S 21200.pts-1.porkypig -X quit. Yet it keeps showing up when running "sudo lsof | grep /dev/ttyS0" Should I just run kill -9 23520?

derobert

if it won't die, you could kill -9 it

just be sure its what you think it is first

(check with ps, for example)

you could also try normal kill (sigterm) first

for some reason, I'm not speaking in messages approaching rasterman length. Must be time to go home!

JohnMerlino

IT WORKED!

the culprit was screen

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