Bug Description

Binary package hint: network-manager

This bug causes name resolution to be painfully slow. If I manually remove the routers ip from resolv.conf it works normally, but next time the machine is booted the address gets added to the list again. I found the only way around this was to lock the file. “sudo chattr +i /etc/resolv.conf” so that network manager would not re-edit the file upon boot. I have seen this problem many times on the forums, and believe it should be made a priority to fix this. This “slow internet” gives people a horrible first impression of Ubuntu, and seems it would be easy enough to to fix. Thank you for our time.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: network-manager 0.8-0ubuntu2
ProcVersionSignature: hostname 2.6.32-18.27-generic 2.6.32.10+drm33.1
Uname: Linux 2.6.32-18-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
CRDA: Error: [Errno 2] No such file or directory
Date: Tue Apr 6 00:42:02 2010
Gconf:

IfupdownConfig:
auto lo
iface lo inet loopback
InstallationMedia: Ubuntu 10.04 “Lucid Lynx” – Beta amd64 (20100318)
IpRoute:
192.168.2.0/24 dev eth0 proto kernel scope link src 192.168.2.5 metric 1
169.254.0.0/16 dev eth0 scope link metric 1000
default via 192.168.2.1 dev eth0 proto static
Keyfiles: Error: [Errno 2] No such file or directory
ProcEnviron:
LANG=en_US.utf8
SHELL=/bin/bash
RfKill:

SourcePackage: network-manager

sudo chattr +i /etc/resolv.conf

after this command your resolv.conf file will be locked and the file will not change on boot, or after create new connection

Installing Apache

1. Open Terminal (Application -> Accessories -> Terminal) and execute the following command:

sudo apt-get install apache2

2. When the setup is complete you can check if the Apache is working properly by pointing your browser to http://localhost. If you see the text “It works!”, it means Apache is working just fine.

3. Towards the end of the installation if you see a message like this inside Terminal, “Could not reliably determine the server’s fully qualified domain name, using 127.0.1.1 for ServerName“, you can fix this by executing the following command. It will open Gedit (text editor).

gksu gedit /etc/apache2/conf.d/fqdn

4. When Gedit opens, type “ServerName localhost” inside the file and click Save. Then close the file.

Installing php5

1. Inside Terminal, execute the following command:

sudo apt-get install php5 libapache2-mod-php5

2. When setup is complete, you have to restart Apache so that php5 will work on Apache. Execute the following command in Terminal:

sudo /etc/init.d/apache2 restart

3. You can now test to see if php5 works with Apache. To do this you can create a new php file inside your /var/www/ folder. (The text in red is the filename. You can put any name.)

sudo gedit /var/www/nass.php

4. The command above will open Gedit. Just type in the following php code, save and close the file:

<? phpInfo(); ?>

5. Now point your browser to “http://localhost/nass.php” and see if you can see the text “yoo hooo!” and a lot of information about your php5 installation. If you see that, it means your have successfully installed php5.

Installing MySQL

1. Inside Terminal, execute the following command:

sudo apt-get install mysql-server libapache2-mod-auth-mysql php5-mysql

2. Towards the end of the installation you will be prompted to set your root or admin password (see pic below)

Installing phpMyAdmin

1. Inside Terminal, execute the following command:

sudo apt-get install phpmyadmin

2 During the installation you will be asked to select the webserver that would be used to run phpMyAdmin. Select Apache2 (see pic below).

3. After the installation is over execute the following command to copy the phpmyadmin folder into the /var/www/ directory. (By default it is installed in /usr/share/phpmyadmin/ directory.)

sudo ln -s /usr/share/phpmyadmin/ /var/www/phpmyadmin

4. Now you can go to the phpMyAdmin login page by pointing your browser to: http://localhost/phpmyadmin/index.php

The username for MySQL and phpMyAdmin is “root”. The password will be what you set in step 2 (under installing MySQL).

That’s it! Now you’ve successfully installed Apache 2 webserver, php5, MySQL and phpMyAdmin on Ubuntu.

UPDATE (28-Jan-09)

(how can you install apache and php ubuntu apt-get install apache)

Open up your home folder; make sure you can see your hidden files.
Navigate to the .kde/Autostart folder and create a new text file: yakuake.
Paste this in the file:

#!/bin/bash
/usr/bin/yakuake

Start up your new Yakuake Terminal and press F12.

~/.kde/Autostart/
chmod +x yakuake

Next time you start Ubuntu Yakuake will be running. You just need to press F12 to access it.
To configure it you can right click on the Yakuake screen and use the menu.
The size of the window and other settings can be accessed by clicking the small down arrow at the bottom right of the screen.

Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 235726 bytes) in /home/uno1093/public_html/wp-includes/class-simplepie.php on line 13070

or

Fatal error: Allowed memory size wp-settings.php on line 307

add this line to your wp-config.php
define('WP_MEMORY_LIMIT', '64M');

(firstly u must be sure to there is a<strong> /etc/init.d/mysql or mysqld</strong> )

# chkconfig --list | grep mysqld
mysqld          0:off   1:off   2:off   3:on   4:on   5:on   6:off
# chkconfig --level 345 mysql off
error reading information on service mysql: No such file or directory
# chkconfig --level 345 mysqld off
# reboot

The chkconfig command can also be used to activate and deactivate services. If you use the chkconfig –list command, you will see a list of system services and whether they are started (on) or stopped (off) in runlevels 0-6 (at the end of the list, you will see a section for the services managed by xinetd.

If you use chkconfig –list to query a service managed by xinetd, you will see whether the xinetd service is enabled (on) or disabled (off). For example, the following command shows that finger is enabled as an xinetd service:

$ chkconfig –list finger
finger on

As shown above, if xinetd is running, finger is enabled.

If you use chkconfig –list to query a service in /etc/rc.d, you will see the service’s settings for each runlevel, like the following:

$ chkconfig –list anacron
anacron 0:off 1:off 2:on 3:on 4:on 5:on 6:off

More importantly, chkconfig can be used to set a service to be started (or not) in a specific runlevel. For example, to turn nscd off in runlevels 3, 4, and 5, use the command:

chkconfig –level 345 nscd off

See the chkconfig man page for more information on how to use it.

Warning

Services managed by xinetd are immediately affected by chkconfig. For example, if xinetd is running, finger is disabled, and the command chkconfig finger on is executed, finger is immediately enabled without having to restart xinetd manually. Changes for other services do not take effect immediately after using chkconfig. You must stop or start the individual service with the command service daemon stop. In the previous example, replace daemon with the name of the service you want to stop; for example, httpd. Replace stop with start or restart to start or restart the service.

To autostart you mysql service : (firstly u must be sure to there is a /etc/init.d/mysql or mysqld )

# chkconfig --list | grep mysqld
mysqld          0:off   1:off   2:off   3:off   4:off   5:off   6:off
# chkconfig --level 345 mysql on
error reading information on service mysql: No such file or directory
# chkconfig --level 345 mysqld on
# reboot

#include <GL/glut.h>
#include <math.h>
#include <time.h>
#define W 512
#define H 512
int points[2][2];
int point_count=0;
void initialize(){
	glClearColor( 0.0, 0.0, 0.0, 0.0);//set background color to black
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluOrtho2D(0, W,0,H);
}

void setPixel(int x, int y){	//change color of a pixel
	glColor3f(1, 1, 1);
	y=H-y;
	glBegin(GL_POINTS);
	glVertex2f(x,y);
	glEnd();
}

void LineWithDDA(int x0, int y0, int x1, int y1) {//DDa line algorithm
    int dy = y1 - y0;
    int dx = x1 - x0;
    int steps,i;
    float xinc,yinc,x=x0,y=y0;
    if( fabs(dx) > fabs(dy)){
        steps=fabs(dx);
    }else{
          steps=fabs(dy);
    }
    xinc=(float) dx/ (float) steps;
    yinc=(float) dy/ (float) steps;
    setPixel(round(x), round(y));
    for(i=0;i<steps;i++){
         x+=xinc;
         y+=yinc;
         setPixel(round(x), round(y));
    }
    glutSwapBuffers();
}
void lineSegment(){
    glClear(GL_COLOR_BUFFER_BIT);
    glutSwapBuffers();
    LineWithDDA(W/2,0,W/2,H);
    LineWithDDA(0,H/2,W,H/2);
}
void Control(int button, int state, int x, int y){

  // Respond to mouse button presses.
  // If button1 pressed, mark this state so we know in motion function.

  if (button == GLUT_LEFT_BUTTON && state == GLUT_DOWN)
    {
  			setPixel(x,y);
  			if(point_count<1){
					points[0][0]=x;
					points[0][1]=y;
					point_count++;
			}else{
					points[1][0]=x;
	 			    points[1][1]=y;
			        use_dda(points[0][0],points[0][1],points[1][0],points[1][1]);
			        point_count=0;
			}
	      glutSwapBuffers();
    }
}
int main(int argc, char** argv) {
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB);
	glutInitWindowPosition(0,0);
	glutInitWindowSize(W,H);
	glutCreateWindow("OpenGL Mouse Function");
	initialize();
	glutMouseFunc(Control);
	glutDisplayFunc(lineSegment);
	glutMainLoop();
	return 0;
}

php simple xml reader script

Gets only one element which you want from xml data.


1 – $file = “xml.xml”; //original xml file
2 – $handle = @fopen($file, “r”);
3 – $write = @fopen(”results.txt”, “w”); //output file
4 – $i = 0;
5 – if ($handle) {
6 – while (!feof($handle)) {
7 – $buffer = fgets($handle, 4096);
8 – $satir = $buffer;
9 – $satir = str_replace(”
10 – “,”",$satir); //your starting pattern
11 – $satir = str_replace(”“,”",$satir); // your ending pattern
12 – if($satir != $buffer){
13 – $i++;
14 – $satir = str_replace(”\n”,”",$satir);
15 – $satir = trim($satir);
16 – $satir = $i.” – “.$satir;
17 – $satir = $satir.”\n”;
18 – fputs($write,$satir);
19 – }
20 – }
21 – fclose($handle);
22 – }
23 – ?>

u can use this with compicated xml files too. this code will get only one type of element like phrases between <phrase> </phrase> tags.
example xml data.

<element>
<url>neteyaz.com</url>
<phrase>banias - php coder</url>
<title>linux and coding blog</title>
</element>
<element>
<url>idealkilohesaplama.com</url>
<phrase>calculate your ideal weight</url>
<title>turkish web site</title>
</element>

output will be like this:

1 - banias - php coder
2 - calculate your ideal weight

enjoy.

1-How to use a function with different data types in c++. i mean, i have a function
that name is abs() and i want to use it just like this:
int x;foo(x); or
float x;foo(x); or
char x;foo(x)…

The solution is simple for this problem:Overloadding isn’t it?
2-Alright, if i want to store my datas in a stack and when i chosee my data type(int,char,float), compiler could create a stack that can work data type which i have choosed. Is it possible? Of course:)

So firstly, i want to solve my first problem using templates:

template <class type_name>
void foo(type_name x){
   cout<<x<<endl;
}

You can call this function with different data types.For example:
foo(3);foo(“a”);foo(3.14);

What is the difference between overloading and template class?When we overload a function compiler choose a correct version of the function in runtime and we have to write the function for each data types that we have.

On the other hand,if we use templates compiler creates a placeholder for our arguments.And in runtime compiler changes it with our data type.So that we dont have to write the same codes for different data types.

I dont mean overloading is unnecessary.I just want to show the differences between overloading a function and creating a function using template class.

Next topic is “How to implement a stack data type with using template class?”.

#include <cstdlib>
#include <iostream>
template <class node_element>
class Node{
      public:
             node_element data;
             Node * next;
};
template <class stack_type>
class Stack{
      public:
             Stack();
             void add(stack_type);
             stack_type pop();
             stack_type top();
             bool isempty();
		 void print();
             int get_count(){return count;}
      private:
             Node<stack_type> ptr;
             int count;
};
template <class stack_type>
Stack<stack_type>::Stack(){
     count=0;
     ptr.next=NULL;

}
template <class stack_type>
bool Stack<stack_type>::isempty(){
     return (get_count()==0)?1:0;
}
template <class stack_type>
void Stack<stack_type>::add(stack_type c){
     Node<stack_type>*newNode=new Node<stack_type>;
     newNode->data = c;
     if(isempty()){
          ptr.next= newNode;
          newNode->next = NULL;
     }else{
           newNode->next = ptr.next;
           ptr.next = newNode;
     }
     count++;
}
template <class stack_type>
stack_type Stack<stack_type>::pop(){
     if(get_count()==0){
         cout<<"Stack is empty!"<<endl;
     }else{
           Node<stack_type> * temp = ptr.next;
           ptr.next = temp->next;
           stack_type data= temp->data;
           delete temp;
           count--;
           return data;
     }
}

template <class stack_type>
stack_type Stack<stack_type>::top(){
     return ptr.next->data;
}
template <class stack_type>
void Stack<stack_type>::print(){
     Node<stack_type> * explorer=ptr.next;
     while(ptr.next!=0){
          cout<<ptr.next->data<<endl;
          ptr.next=ptr.next->next;

     }

     ptr.next=explorer;
}

int main(){
	Stack<int> intStack;
	intStack.add(3);
	intStack.add(4);
	intStack.add(5);
	intStack.pop();
	intStack.print();
	Stack<char> charStack;
	charStack.add('a');
	charStack.add('b');
	charStack.add('c');
	charStack.print();
	charStack.pop();
	charStack.print();
}

Page about: How to Use Template Class or Function in C++ (Stack Implemantation), C++ Template,Stack Template,overloading vs template,using templates

Maybe one day you can meet an asume alien girl however she don’t know any language except morse alphabet (she communicates only this way:-)). So, what will you do? Dont be sad cause i wrote a python code to decode what she says and encode yours.

1 - MORSE=[".-","-...","-.-.","-..",".","..-.",
2 -       "--.","....","..",".---","-.-",
3 -       ".-..","--","-.","---",".--.",
4 -       "--.-",".-.","...","-","..-",
5 -       "...-",".--","-..-","-.--","--.."]
6 - SP=["a","b","c","d","e",
7 -    "f","g","h","i","j",
8 -    "k","l","m","n","o",
9 -    "p","q","r","s","t",
10 -    "u","v","w","x","y","z"]
11 - def encode(normal):
12 -     encoding=""
13 -     for i in range(len(normal)):
14 -         encoding+=MORSE[SP.index(normal[i])]
15 -         encoding+=" "
16 -     print encoding
17 - def decode(morse):
18 -     normal=""
19 -     morse=morse.split(" ")
20 -     for i in range(len(morse)):
21 -         normal+=SP[MORSE.index(morse[i])]
22 -     print normal
23 -
24 - choice=int(raw_input("Choose the operation\n1-Normal To Morse\n2-Morse To Normal\nChoice:"))
25 - if(choice==1):
26 -     expression=raw_input("Type your words without spaces:")
27 -     encode(expression)
28 - elif(choice==2):
29 -     expression=raw_input("Type your morse expresion:")
30 -     decode(expression)
31 - 

This Code is About: How to Decoding Morse and Encoding Morse with Python, Decode Morse,Encode to Morse,Morse Encoding,raw_input,Python