How To Debug In Ubuntu 12.04

Hello--

I'm trying to locate a file or a command line in a file on my hard drive. I am running Ubuntu 12.05.4 linux. Is there a grep command that will search the whole tree from root down to all the sub-directories?

Thank You.

Hi all! Just joined. First post.

Looking around Amazon.com I see that there are a lot of books out there. I was wondering if there were a small number that were generally considered to be the best for a newbie to learn Ubuntu and the command line.

I am a Windows refugee having bought a clean machine from System76 in May 2014 with Ubuntu 14.04 LTS installed. I got my first computer back in the early 90's and actually liked DOS! Kind of full circle I guess.

Any suggestions are appreciated.

Thanks!

Kevin

Hi folks,

after googling for a couple of days, I get the feeling, this is a common problem. But the usual fix doesn't seem to work for me.

I am trying to install Linux on a separate partition of my Acer Aspire V5-573G. I used the Lili USB Creator to make a bootable USB drive with Ubuntu 12.04 on it.

when I reach the installation menu, it doesn't matter what I choose (start live, install..), my notebook will always freeze on a black screen.

I figured out how to add 'nomodeset' to the grub line. This does bring me one step further (the Ubuntu start screen) but then I get this message:

Code:

ubuntu@ubuntu:^^$ [   20.267422] mei 0000:00:16.0: init hw failure. 
[   20.267558] mei 0000:00:16.0: initialization failed.

After pressing enter I get a command line. From here I don't know what to do.

I've tried other distros (Lubuntu, Linux Mint), but then even 'nomodeset' didn't make a difference. I have also tried to add 'acpi=off' to the grub line after 'nomodeset', but again only black, even with Ubuntu.

Any suggestion or help will be greatly appreciated!

I am not sure what happened here, and I find it oddly disturbing that a Putty session from Window could do this, but here is what I did -

I was attempting to open a ssh redirect session from Putty command line on my W7 work PC to my home PC running Ubuntu 14.04. I've done this before with the Putty GUI and had no issues at all, but this time I was using cmd line and it never did connect. I ran this command:
Code:

putty -ssh -D 1080 -P 22 domain.com

The Putty window opened but never connected. I tried twice and when it didn't connect, I gave up and went back to the GUI. I connected with the GUI just fine, but after connecting an SSH session to my Ubuntu server at home, I noticed it was acting odd.

Long story short: It was in a "read-only" mode, saying the file system was read-only. I couldn't run apt-get update or even create a new folder in my Home folder or desktop. I remotely rebooted the machine and it never came back online.

When I got home I checked it, and it told me that Ubuntu had found some errors, and was asking if I wanted to correct them. I said yes and it took a short while, but then finally let me log back in.

After this, the box is about 90-95% back to normal except for a couple of odd things that I don't understand.

The main issue is that my Samba shared drives are no longer working. The fstab file looks the same and can connect to other machines, but nothing can connect back to the Ubuntu box. The folder permissions are correct also. I have a CentOS7 box, a Fedora laptop and a W7 box - none of them can connect to my Ubuntu box. I only run Samba and connect with it, even from Linux boxes, just to make it simple (since Windows is stupid and can't use NFS) - this has always worked in the past. Now for the life of me, I can't figure out why nothing will connect.

Is there a logfile or trouble-shooter I could look at it see what happened? It should be in /var/log somewhere, but I don't know where to start. SSH? Samba? The entire filesystem was read-only for a short while, so is there a FS or System log in /var/log?

I am kinda confused on this one, any help is appreciated.

Hi there. I have Ubuntu 14.04 installed. Actually I have been doing a lot of work in this OS for about a year. The thing I cannot still comprehend is how to find files I installed. In this particular case I need glut.h for g++ compiler. So I go here, do this command;

Code:

sudo apt-get install freeglut3-dev

And find out that I already have the newest version (which I have suspected since I recall installing it).

So, the next step is to find the glut.h file and reference it with #include command. I cannot find it anywhere. This website says it has to be he

Code:

/usr/lib/x86_64-linux-gnu/libglut*

Why's the asterisk? Is it a footnote or part of the code?

I don't seem to have /usr/ directory. I cannot find it anywhere.

How does Ubuntu directory work?

Thanks, - A.

Hey guys
I have been trying to patch GPSR with ns-2.34.The operating system i am using is ubuntu 12.04.
I have made all the necessary changes required in the various files .

I have another version of ns (ns-2.35 ) too but it is in a different directory.
Everytime I run my tcl file an error keeps coming up.
I will be greatful if somebody can help me.This is very very URGENT.


(_o29 cmd line 1)
invoked from within
"_o29 cmd if-queue _o23"
invoked from within
"catch "$self cmd $args" ret"
invoked from within
"if [catch "$self cmd $args" ret] {
set cls [$self info class]
global errorInfo
set savedInfo $errorInfo
error "error when calling class $cls: $args" $..."
(procedure "_o29" line 2)
(SplitObject unknown line 2)
invoked from within
"$agent if-queue [$self set ifq_(0)] "
(procedure "_o17" line 28)
(Node/MobileNode add-target line 28)
invoked from within
"$self add-target $agent $port"
(procedure "_o17" line 15)
(Node attach line 15)
invoked from within
"$node attach $ragent [Node set rtagent_port_]"
(procedure "create-gpsr-routing-agent" line 29)
invoked from within
"create-gpsr-routing-agent $node $id"
(procedure "gpsr-create-mobile-node" line 41)
invoked from within
"gpsr-create-mobile-node $i"
("for" body line 2)
invoked from within
"for {set i 0} {$i < $opt(nn) } {incr i} {
gpsr-create-mobile-node $i
}"

I try to install ubuntu 9 on woindows 7.The ubuntu is working quite fine.I try to see where my bin files are located.Its in folder FILE SYSTEM.
My commands ip addr,ls are working.

The command sudo cd/usr/bin is not working.

Please let me know where problem is.

I am workin on OLSR in ns 2.35 ubuntu 14.10.

I perform all steps and install ns 2.35 and patch um-olsr-ns-2.35_v1.0.patch file after that olsr example run succesfully but problem is every example not run succesfully they showing me fatal error or any line error.

so can u tell me how to solve it

os : ubuntu 14.10 i686.

I have two files which has exact same number of lines.
I want first line of first file should be filename of new file and content of this new file should be first line of second file.
Then second line of first file should be filename of again new file and content of this new file should be second line of second file.
then third line of first file should be filename of again new file and content of this new file should be third line of second file.
and so on...
I am trying to do it using for loop but I am not able to create two for loops.
This is what I have done
Code:

IFS=$'\n'
var=$(sed 's/\"http\(.*\)\/\(.*\).wav\"\,\".*/\2/g' 1797.csv) # filenames of all files
var2=$(sed 's/\"http\(.*\)\/\(.*\).wav\"\,\"\(.*\)\"$/\3/g' 1797.csv) # contents of all files
for j in $var;
do
#Here I do not know how to use $var2
done

Please help.

Stupid question i know. I am trying to install some brother printer drivers and following the instructions it states that i must change to the directory where the file is stored by using the following command line "cd /home/(loginname)/downloads"

this comes back with unkown directory. When i use DIR the directory is there but it will not allow me to access it?

This has worked before. I have been using linux now for a few years and never had this problem before. It must be something stupid that I am doing.