Hm. I'm doing OK on most courses

This is only possible, if you study plan isn't rigidly organised though. Only very few courses had formal participation requirements (e. g. "must have passed Statistics I to take Statistics II").

Although my grades are good, Electronics I'm pretty bad at (grades still passable though)

But last week for linux / scripting I got my first failure

the thing is, we only have labs. No exams for this so i can't pull back my grades unless I ace this assignment

Got a question though

You guys got 'stuck'(for lack of a better word) at the softlink part right? What exactly is wrong with it / am I doing wrong?

@MaartenWachters 1) it doesn't make much sense since you haven't told us what it's supposed to be doing and ii) it's a function that you are calling in your script but haven't defined it anywhere.

I understand

ln -s /usr/bin/bar /opt/foo

so I just need to create another function for the softlink now if I'm not mistaken

Yes. But what are you supposed to be linking?

create a softlink between a user and a group

he hasn't really explained it (like usual) but from my understanding if I delete the group it also deletes the users

I think like that

or if you're in the file path of that user, there is a file in there that once run it just opens that one group

Ran into an error fixed it :)

Um. None of that makes sense I'm afraid.

You can't create a softlink between a user and anything. Soft (or hard) links are for files/directories.

What does the assignment say?

Create softlink between group / user

I swear I'm not doing this to piss you off. His instructions are just mega unclear

@MaartenWachters I didn't think you were :)

I got a question though

But you can't link a user to a group, so he must have meant something else.

its again with calling the script to execute a case

Yeah?

When I do sudo ./scriptname.sh -u maarten (for the add user case in u)

it just does nothing

@MaartenWachters What does the script look like now?

Well I was getting the syntax errors out

Nvm. Need some time to think how to phrase this

This works:

while getopts "ugb: " opt; do
 case $opt in

 u)
    read -p "Wat is de naam van de user die je wilt toevoegen?: " username
    [ "$username" == "" ] && echo "Geen usename meegegeven!" && exit 1
    read -p "Wat is de groepsnaam voor de gebruiker?: " group_name
    [ "$(getent group $group_name)" == "" ] && echo "De groep bestaat niet, exiting"  && exit 1
       echo  adduser -m -g "$group_name" "$username"
   ;;
 esac
done

Yeah that's what I've got now

$ a.sh -u
Wat is de naam van de user die je wilt toevoegen?: foo
Wat is de groepsnaam voor de gebruiker?: terdon
adduser -m -g terdon foo

So when I do sudo ./scriptname.sh -u

Wat is de groepsnaam voor de gebruiker?: terdon

the issue is there

if i want it to add to stackoverflow (a group i dont have yet)

just gives me the exiting echo

@MaartenWachters Then it will exit.

That's what this line does:

so I need to call the make group bit first(-g)

[ "$(getent group $group_name)" == "" ] && echo "De groep bestaat niet, exiting"  && exit 1

It also doesn't help that I think he made some typo's in his slide

@MaartenWachters The script is structured so that you run it once to create a group and then again to create a user and add it to the group.

@MaartenWachters Which slide?

prntscr.com/9am69v

onetime he uses $group_name the other $groupname

Needs to be all the same if I'm not mistaken

I made it all group_name and it works, except it throws me error

mk_shared_folder : command not found

@MaartenWachters Yes, well, the mk_shared_folder is another function.

And yes, he has a typo there. It should always be $group_name.

I feel like I'm getting to understand it more and more. I really do

I see what you mean now

With the create softlink

@terdon is it possible to make a case that triggers when you do ./scriptname.sh help?

right now i've put my help inside case v

That's usually done with -h. Or in the absence of arguments.

I will do that, sounds easy enough :)

Hmm sudo ./scriptname.sh -h throws an error

weird

{
        echo "Druk -u om een user aan te maken"
        echo "Druk -g om een groep aan te maken"
        echo "Druk -b om een backup aan te maken"
        echo "Druk -x om een backup te restoren"

}

        h)
                display_help
        ;;

doesn't work

\o/

@ParanoidPanda alien is your friend if only rpms are available...

But what's wrong with clamAV? (that's what I use)

Hello :)

@cl-netbox good meowning

Hey serg

@Serg good ... my friend ! :)

Is terdon still here?

@terdon ^

@MaartenWachters Yes, back now.

@Fabby Hi old ... :)

I can just use echo's in my function right?

Yes but what you posted isn't a function. You need:

Hi @terdon :)

functionName(){
    echo foo
}

@cl-netbox hi!

I've done that

@cl-netbox fart? ;-)

Or function myName { echo CARP }

@ParanoidPanda Hi :) what linux viruses ? do you know any ? =)

@Fabby YES ... SIR ! :D (your way older ...) :D

So, I'm going to be getting raspberry pi . . . And my friend's sister in law has a son . . . Yesterday we were talking and she was saying she wants her son to kind of start learning the same stuff I do, so he has technical skills early to start . . . So I

@MaartenWachters Yes, that should work:

#!/bin/bash

display_help()
{
echo "I'm not much help"
}

display_help

I'm considering teaching him with raspberry to use Ubuntu and stuff. . . set up a minecraft server

@ParanoidPanda so then with ClamAV you are good to go ... :)

@terdon For some reason it doesnt though

@MaartenWachters What are you running?

'option requires an argument --h'

sudo ./scriptname.sh -h

@MaartenWachters Did you add h: to getopts or just h?

@MaartenWachters the : means the option needs an argument. You have used this: while getopts "ugb:h:" opt; do instead of while getopts "ugb:h" opt; do

It works. But why :o

we don't do u:g to call a group either?

@Serg Good idea!

yikes apple at it again claiming they invented everything:

@Serg I'd pay to join that

@ParanoidPanda ClamAV was acquired by Sourcefire, which later was acquired by Cisco ... so I think they most probably will have reasonable heuristics ... :)

@cl-netbox I agree and said the same thing a few seconds before you! CC: @ParanoidPanda

@MaartenWachters What?

@terdon Why does the h need to be outsude ugb:?

@MaartenWachters I rarely take money as payment, but i do love when people give me delicious food :p

@Mateo Depends on your definition of "major"... ;-)

@Serg I'll make you a cake inside Minecraft \o/

@MaartenWachters It doesn't. It can be anywhere but it can't have a : after it. When you use h:, it tells getopts that -h should have an argument.

:) that might work

so now they are calling Google "minor"?

and RHEL, and IBM, and Microsoft, and Canonical, and Sun, and Oracle.

@Mateo How about IBM, Novell, RedHat, Canonical etc?

@Serg I like it when they pay me money and allow me to go shopping for the food and cook it for them!

yeah, those too

(shopping includes choosing) @Serg

Welp I live in Belgium so it's not like I can just walk up to @Serg and give him a cookie

@terdon so a h can never have :h

@Mateo Google gives back less to the community then Apple.

At least Apple gave us CUPS...

@Mateo I do respect Apple for taking Unix-like system, and putting it on a world map . . . but this whole business shark behavior is just . . . makes my respect for them drop down by 50%

@Fabby :3 I am not much of a cook, so i mostly enjoy my friend's cooking, and playing with their kids . . . .

They're so adorable !

@MaartenWachters What? No! Look, adding a : after an option tells getopts that the option needs an argument. So, h means a switch, no argument, just on or off. h: means an argument: -h foo. :h means nothing.

@MaartenWachters yeah, Belgium is a little far from Denver, CO

Ehh I think I get it terdon

@ByteCommander: Happy +200! ;-)

Congratz

@terdon can I haz a shell question now ?

nevermind, got it

shell question?

I got plenty XD

It's more of a rant . . .

I was reading /bin/which source

#! /bin/sh
set -ef

if test -n "$KSH_VERSION"; then
        puts() {
                print -r -- "$*"
        }
else
        puts() {
                printf '%s\n' "$*"
        }
fi

ALLMATCHES=0

while getopts a whichopts
do
        case "$whichopts" in
                a) ALLMATCHES=1 ;;
                ?) puts "Usage: $0 [-a] args"; exit 2 ;;
        esac
done

The author creates function called puts . . . which checks for korn shell version . . . if it's not korn shell that is default, printf is used, otherwise print

But . . . why not just use printf regardless of the shell ?

it's defined in every shell pretty much . . .

@ParanoidPanda I have read some time ago that installing this Comodo thing generated a lot of issues on many users' machines ! :)

How do go about restoring a backup in the same script @terdon (last piece of script :D )

@Rinzwind @terdon @muru well, since I am still on the roll here, I still haz a shell question . . . So, is there a sort of general guide on how to make POSIX-compliant, portable shell scripts ? Is there a sort of general rule on what to avoid and what to use ?

@ParanoidPanda system things ... AV apps are known for spreading their code deep and widely over OSes.

What do you mean?

I see @NathanOsman fixed the bordering :D

I'm gonna be back later folks, i forgot my laptop charger in another building

brb lol

@ParanoidPanda ¯_(ツ)_/¯

I've got an issue with my getopts

Since we did the ugb:h the b has the same erorr as the help function had beforehand

broke my script

@Serg The POSIX specs, I guess.

@terdon I fucked up my script

hang on

@MaartenWachters show me

how do I copy everything inside my vim

it won't scroll down when selectin,

@MaartenWachters on what OS?

Ubuntu

  #!/bin/bash

[ $(whoami) != "root" ] && echo "Run as superuser" && exit 1

display_help()
{
        echo "Druk -u om een user aan te maken"
        echo "Druk -g om een groep aan te maken"
        echo "Druk -b om een backup aan te maken"
        echo "Druk -x om een backup te restoren"
}


restore()
{

}

add_user()
{
        read -p "Wat is de naam van de user die je wilt toevoegen?: " username
        [ $username == "" ] && echo "Geen username meegegeven!" && exit 1
        read -p "Wat is de groepsnaam voor de user?: " group_name

@MaartenWachters Why did you add a : before u?

That's the problem.

When i remove it it gives me syntax error

What error? Come on, help me out here!

So whenever I run any of the cases now

Does it say line 18: syntax error near unexpected token }'`? That should give you a hint about where the error is.

line 17 : systax error near unexpected token '}'

So?

Where is the error?

Duplicate restore function?

No, empty restore function.

And duplicate but the error is because it's empty.

Okay but then I still have the illegal option all over again

on every singly case

Did you remove the : before the u?

yep

You need this:

while getopts "ugb:xh" opt; do

The b needs the colon, none of the others do. It works fine like that.

One more thing, you don't want the `` here:

        [ "$(getent group $group_name)" != "" ] && echo "De groep bestaat, exiting" \ && exit 1

Remove it:

        [ "$(getent group $group_name)" != "" ] && echo "De groep bestaat, exiting"  && exit 1

It shouldn't make a difference, just ugly.

while getopts "ugb:xh" opt; do

doesnt work

Yes it does.

still gives me the illegal option

Look, don't tell me "it doesn't work". That's useless. Tell me the error.

WOW. Nvm i just brainfarted

@MaartenWachters Then you are probably trying to run it with a flag that doesn't exist:

$ sudo ~/scripts/a.sh -p
/home/terdon/scripts/a.sh: illegal option -- p

yah

I brainfarted

Just need to figure out how to make a restore function now

Welp, i 've left my laptop charger possibly at my friend's house . . . carp . . . cygwin it is for today !

@Serg Ouch. That sucks. Sounds like a good opportunity to install Linux on your Windows machine then :)

@terdon yeah, except it's my university's Windows computer , and they won't be happy about that :). . .Thank gawd they have macs . . . But since I have cygwin, sure, i'll take that . . . Speaking of university computers, i once caught a guy who was booting an external hard drive with Debian on it . . .I'm of course happy when people use Linux, but it's kind of against the rules here to mess with the computers

Ah, there we go, Win 7 and cygwin . . . .I feel nervous when i don't have a terminal window open

@Serg That's not really messing as such. He wouldn't need to touch the local drive.

@terdon yup, as long as he doesn't mount the local drive, it's safe . . .but I ain't trusting people not to do stupid stuff . . .

Hello everyone! Does anyone here remember me from the old times? :P

@Mahesh if by old times you mean more than a year ago, then no :) But nice to meet you ! I am Serg

Definitely more than a year ago. Actually much longer than that, I'm afraid.

hi @Mahesh

Hola!

Chat is kind of slow right now :/

It was always the same.

I used to hang around all day whenever I am online.

I slowly stopped being here, then since the last few months switched to a mac at work. I'm planning to ditch this for ubuntu again, I miss unity.

I usually just carry my laptop to college and use my Ubuntu 14.04 with something lighter than Unity, like Blackbox, Openbox, or Gnome , though there are times when i get into Unity and stay there for a week or so

Today, because of my forgetfulness , i have to suffer on windows 7 and use cygwin

Ouch. cygwin helps, but not having a true linux system kind of drives me crazy.

I had an affair with Gnome for a while. I like it, but am addicted to unity. :(

Oh, yes, same here. I get apprehensive without knowing I have real terminal, and there's TTYs in the background, and without all my scripts and functions

I'm curious, what's the use case?

@ParanoidPanda yaaaay, you're famous nuw

IIRC, Gnome supports filtering windows by typing their titles, so I never had a reason to want to manually organize them

Umm, yep.

If you are using FF, just enter overview and start typing fox

all firefox windows remain, and anything without a fox in the title bar disappears.

so it becomes easy to locate windows.

Gimme a couple of minutes, I'll go google

I'm talking about this, but for Gnome. May be an extension I used.

It may have been this one.

Sorry, I have a terrible memory

Does Gnome still use compiz under the hood?

There's a compiz plugin that ships by default, scale window title filter or something.

There's this and this other one

@ParanoidPanda speaking of window searching utilities, I think JacobVlijm wrote something like that once in python . . .one could also do something like that with a shell script and wmctrl or xdotool

@ParanoidPanda can i plz have one more close vote on this question ? There's a newer one askubuntu.com/q/278863/295286

Done.

@Mahesh thank you :)

You're welcome. :)

In general, nope.

What's the directory in question?

@ParanoidPanda you can use lsof to find which app is holding file open, but not which program created a file

The name/path might give hints. ANd if you are lucky you might be able to catch the process while it is running by using lsof and friends, like @Serg said. Otherwise, no luck.

Also, if an app is a script, you could grep that script's source for filename, too :) If it's a binary app - nope

yup

don't use sudo by default, but yep, lsof requires sudo.

And people wrote fuse adapters for youtube and a few other major sites.

And gvfs is Gnome virtual file system.

@Mahesh wut ? O.O i can mount interwebs ?

Common culprits: Media players - MTP, Bluetooth devices - OBEX, FTP, Webdav,...

I'll probably stay away from that for now O.o or i might break things . . .

Hahahah

I don't wanna LOL cats videos to be gone from the web :D

I broke things constantly for a while before I learned to find my way around

There was a time when I used to reinstall ubuntu every week, because I made it unusable.

And just when I left ubuntu about 4 months ago, I could run a sudo rm -rf <the scary root> and still recover everything in 5 minutes flat

Recover from sudo rm -rf / ? wow, how ?

eh, i've been breaking my ubuntu a little bit at first, but i try not to right now

Hi there anyone was trying to set up a TOR hidden server? , im geting kind of a permission server...

Dec 05 12:29:53.000 [err] Couldn't write generated key to "/u/apps/private_key".

The install script was run as root?

yep

root@ubuntu:~# cat /etc/tor/torrc | grep 'Hidd'

im writing an ansible playbook to deloy them as easy as possible, but i cant make it work even manually :(

> You're going to want to change the HiddenServiceDir line, so it points to an actual directory that is readable/writeable by the user that will be running Tor. The above line should work if you're using the OS X Tor package. On Unix, try "/home/username/hidden_service/" and fill in your own username in place of "username".

okay thanks

i dont have any user but i'll create one

cheers

wait, you should not have to create a new user.

And in that case the permissions are already correct.

ps -ef | grep -i 'tor'

noooooo

Eew, it's indeed fat!

it's not fat, just slightly bubbly

@Fabby Thanks for the...

:D

@ParanoidPanda good Ai-dee-ah . . . i will do the same, once i get my poor laptop back to the charger

but first i need more RAM

and more coffee

and a million dollars

and girlfriend . . .

@Serg and lower expectations... :P

Anyway, I have to head back into the kitchen... Bye all!

@ByteCommander my expectations aren't that high . . . I can settle for 500, 000 dollars too :D

@ByteCommander : congrats ... and goodbye :)

@ParanoidPanda no money to move yet, currently my bank account has 985$ and couple cents

I will leave as well - see you - bye :)

@Serg sleep well :)

@ParanoidPanda goodbye :)

OK, I lied , it's 966$ now . . . digital ocean and parking fee got subtracted this morning

@ParanoidPanda Japan , I'm sure, is pretty cool, though i've never came in contact with Japanese people. But it should be pretty peaceful there and friendly community

@ParanoidPanda oh yes, i love sushi. O.O Speaking of which, i need to have some sushi some time, haven't had it in a long time. . . .also i am hungry right now

@ParanoidPanda nope, I haven't

Looks like my server has been probed by the botnet mafia

@ParanoidPanda my best friend's sister in law has been cooking duck and goose for us couple times. I love it. In fact I love her cooking in general . . .

There's couple good sushi places in Denver, though i mostly go to Sushi Katsu . I used to work a little bit in Dragon Boat - my other best friend works there. Lovely place, it's like half Chinese food , half sushi

:D

Lol, China and Japan have kind of tense relationship because of World War 2 . . .

So i doubt Pandas are going to see that much of Japan

I'll go for more nicotine

brb

Aaand I'm back