ㅂㅈㄷㄱ
Posted by YoungMoon
:
어렵다는데?!ㅋㅋ

wc -1, w, c
->라인 단어 문자 갯수 세기
ps -f, -ef
->프로세스 확인
PID: 프로세스의 고유한 아이디
쉘: 명령어의 집합

cat > 111한 다음에 ctrl+z하면 명령 프롬프트가 전면으로 나오지만 백그라운드에서는
cat이 동작하고 있다. fg명령어를 치면 cat이 리쥼이 가능하다. 여러가지가 있을 경우
[fg 숫자]의 형태로 입력하면 선택하여 리쥼할 수 있다.
예)fg 1

절대경로, 상대경로

l //path를 입력해 줘야 한다
lp //path가 있다
v //
vp //

l과 v의 차이~!

execlp("ls", "ls", "-l", (char* 0) //중요.....앞에는 각 인자값 그리고 맨 마지막에는 NULL이들어가야 한다...잊어먹기 쉬우므로 잊지말자~명령어에 p가 붙어있으므로 path가 있는 것이다

fork와 exec의 차이점......

시험에 이게 나온다......................................................
마운트 사용방법
리눅스 명령어
stat구조체 공부
gcc가 컴파일되는 과정(생성되는 코드들이랑 단계적으로 하는 일)
절대경로와 상대경로 (바나나~)
라인시크 어떤 옵션을 사용해서
gdb사용방법 (gdb를 사용하려면 컴파일시 옵션을 줘야한다)
chmod chown 사용방법
access 함수와 umask 함수 사용방법 (umask계산방법)
리다이렉션 >와 >>의 특징
하드링크와 소프트링크
open read 함수
a.text라는 파일이 있을 때 이것을 오픈하는 방법을 쓰시오
open("a.txt", 옵션(O_RWD | O_ERW |); 읽기쓰기 전용과 ~~~권한을 가지는 함수를 작성하여라
Posted by YoungMoon
:

1. 텍스트모드로 설치한다
2. 복구모드로 접속한다
3. 아래 방법을 따라한다
Ubuntu Edgy Installation Guide

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In Ubuntu Edgy you can choose between two methods of installing the proprietary ATI driver. If you are new to linux you should use the first method as it is a lot easier than the second one and will work well in most cases. The second method describes how to install the very latest driver version, but requires some additional work and knowledge.

Contents

[hide]

[edit] Method 1: Installing Edgy's Included Driver (8.28.8)

The included fglrx driver supports Radeon 8500+ and the X-series cards up to X1900.

[edit] Disable Composite Extension

In Ubuntu Edgy the Composite extension is enabled by default, however, fglrx does not yet support Composite with DRI. In order to to disable Composite you have to edit the xorg.conf file:

sudo gedit /etc/X11/xorg.conf

and add these lines at the end of the file:

File: /etc/X11/xorg.conf
Section "Extensions"
        Option  "Composite" "Disable"
EndSection

[edit] Installing the driver

Make sure the restricted repository is enabled in /etc/apt/sources.list or this guide will not work!

sudo apt-get update
sudo apt-get install linux-restricted-modules-$(uname -r) #Okay if it is already installed
sudo apt-get install xorg-driver-fglrx
sudo depmod -a
sudo aticonfig --initial
sudo aticonfig --overlay-type=Xv

Now Reboot your system:

sudo shutdown -r now

An alternative to the aticonfig --initial command is to edit /etc/X11/xorg.conf and replace the string "ati" with "fglrx" in the "Device" section. This way you won't lose your old "Screen" and "Monitor" settings. Afterwards you can use aticonfig for setting overlay etc.

[edit] Confirm that it works

fglrxinfo
display: :0.0  screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: RADEON 9600 Generic
OpenGL version string: 2.0.6011 (8.28.8)

[edit] Troubleshooting for Method 1

  • The output of dmesg | grep fglrx and /var/log/Xorg.0.log are most useful when looking for errors. You should really include this when you are asking for help somewhere.
  • If you used Method 2 before, you have to unblacklist fglrx again by editing /etc/default/linux-restricted-modules-common. You may have to run sudo lrm-manager afterwards.



[edit] Method 2: Generating/Installing Ubuntu packages for the new 8.30.3 drivers in Ubuntu Edgy Manually

The new fglrx driver supports Radeon 9500+ (older cards will not work!) and the X-series cards up to X1900.

[edit] Disable Composite Extension

In Ubuntu Edgy the Composite extension is enabled by default, however, fglrx does not yet support Composite with DRI. In order to to disable Composite you have to edit the xorg.conf file:

sudo gedit /etc/X11/xorg.conf

and add these lines at the end of the file:

File: /etc/X11/xorg.conf
Section "Extensions"
        Option  "Composite" "Disable"
EndSection

[edit] Blacklist old fglrx module from linux-restricted-modules

As ubuntu's linux-restricted-modules package includes the fglrx module from an old driver version (8.28.8), we have to blacklist this module to make sure the new kernel module which is needed by the new driver will be used instead.

sudo gedit /etc/default/linux-restricted-modules-common

Edit DISABLED_MODULES to include fglrx

File: /etc/default/linux-restricted-modules-common
DISABLED_MODULES="fglrx"

[edit] Installing the new driver

Download the ATI driver installer: ati-driver-installer-8.30.3.run (this installer is for 32bit and 64bit systems)

Change to the download directory. Make sure that you have the universe and multiverse repositories enabled in /etc/apt/sources.list before doing these steps.

Install necessary tools:

sudo apt-get update
sudo apt-get install module-assistant build-essential
sudo apt-get install fakeroot dh-make debconf libstdc++5 linux-headers-$(uname -r)

Create .deb packages:

sudo ln -sf bash /bin/sh
bash ati-driver-installer-8.30.3.run --buildpkg Ubuntu/edgy
sudo ln -sf dash /bin/sh

Install .deb packages:

sudo dpkg -i xorg-driver-fglrx_8.30.3-1*.deb
sudo dpkg -i fglrx-kernel-source_8.30.3-1*.deb
sudo dpkg -i fglrx-control_8.30.3-1*.deb

Remove any old fglrx debs from /usr/src/:

sudo rm /usr/src/fglrx-kernel*.deb

Compile the kernel module:

sudo module-assistant prepare
sudo module-assistant update
sudo module-assistant build fglrx
sudo module-assistant install fglrx
sudo depmod -a

IMPORTANT: You have to recompile the kernel module after each kernel update!

Update the xorg.conf file:

sudo aticonfig --initial
sudo aticonfig --overlay-type=Xv

Note: You could also edit your /usr/X11/xorg.conf file to change your driver to fglrx then run:

sudo aticonfig --overlay-type=Xv

This way your xorg.conf file will stay clean.

Now Reboot:

sudo shutdown -r now

[edit] Confirm that it worked

$ fglrxinfo
display: :0.0  screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: RADEON 9700 Generic
OpenGL version string: 2.0.6119 (8.30.3)
$ glxinfo | grep render
direct rendering: Yes

If your direct rendering is disabled, you may have to symlink the dri folder:

sudo mkdir /usr/X11R6/lib/modules
sudo ln -s /usr/lib/dri /usr/X11R6/lib/modules/

[edit] Troubleshooting for Method 2

[edit] xorg.conf

The aticonfig --initial command will not update the xorg.conf file if it already has a "fglrx" Device section. However, you may force aticonfig to generate default Monitor, Device, and Screen sections with the following command:

sudo aticonfig --force --initial




[edit] The module compiles, but doesn't work

For some reason fglrx may need gcc-4.0 to compile, if you experience some message related to gcc version in dmesg, try this:

First we'll install it

sudo apt-get install gcc-4.0

and link it to gcc.

sudo ln -sf /usr/bin/gcc-4.0 /usr/bin/gcc

After doing the module-assistant steps, you may want to return gcc to 4.1 by default:

sudo ln -sf /usr/bin/gcc-4.1 /usr/bin/gcc

[edit] Troubleshooting for both Methods

[edit] General

The output of dmesg | grep fglrx and /var/log/Xorg.0.log are most useful when looking for errors.


[edit] DRI does not work although the fglrx module is loaded

If fglrxinfo shows:

OpenGL vendor string: Mesa project: www.mesa3d.org

Make sure the Composite extension is disabled, add this to your /etc/X11/xorg.conf file:

Section "Extensions"
    Option "Composite" "Disable"
EndSection

This should also resolve the corrupted mouse cursor problem in dual-head mode.

[edit] Module isn't loaded

If the fglrx module isn't loaded try to add fglrx to /etc/modules on a new line. See also bug 63912.

File: /etc/modules
# /etc/modules: kernel modules to load at boot time.
#
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.

fglrx

[edit] 2D speed

If you suffer from slow 2D speed it might help to set

Option		"XaaNoOffscreenPixmaps"

in the fglrx device section of /etc/X11/xorg.conf

[edit] Is the rebooting really necessary?

No.

However, rebooting is the easiest method to ensure that the kernel module(s) from the old driver are unloaded and the fglrx module is loaded instead. If you don't want to reboot for some reason, you may manually shut down Xorg, unload any old "drm", "radeon" or "fglrx" modules and then start Xorg again.

Note: if modprobe fglrx can't find the fglrx module, try rebuilding your kernel module dependency:

sudo depmod -a

[edit] Revert to Xorg driver

If (for any reason) the fglrx install fails, you can revert to the Xorg driver by executing

sudo dpkg-reconfigure xserver-xorg

and selecting the "ati" driver, or simply restoring the previous /etc/X11/xorg.conf file, if you made a backup.

You also need to remove the xorg-driver-fglrx or your manually installed drivers to get the 3D acceleration back, since it is provided by file /usr/lib/libGL.so.1.2 which belongs to libgl1-mesa package and which is moved to backup and replaced at the installation of xorg-driver-fglrx (or the manually built) package. In case the removal of the fglrx drivers fails to restore the file from libgl1-mesa, you have to reinstall the package by running:

sudo apt-get install --reinstall libgl1-mesa
Posted by YoungMoon
:

Configuring DHCP address for your network card

If you want to configure DHCP address you need to edit the /etc/network/interfaces and you need to enter the following lines replace eth0 with your network interface card

sudo vi /etc/network/interfaces

# The primary network interface - use DHCP to find our address
auto eth0
iface eth0 inet dhcp

Configuring Static IP address for your network card

If you want to configure Static IP address you need to edit the /etc/network/interfaces and you need to enter the following lines replace eth0 with your network interface card

sudo vi /etc/network/interfaces

# The primary network interface
auto eth0
iface eth0 inet static
address 192.168.3.90
gateway 192.168.3.1
netmask 255.255.255.0
network 192.168.3.0
broadcast 192.168.3.255

After entering all the details you need to restart networking services using the following command

sudo /etc/init.d/networking restart

Setting up DNS

When it comes to DNS setup Ubuntu doesn’t differ from other distributions. You can add hostname and IP addresses to the file /etc/hosts for static lookups.

To cause your machine to consult with a particular server for name lookups you simply add their addresses to /etc/resolv.conf.

For example a machine which should perform lookups from the DNS server at IP address 192.168.3.2 would have a resolv.conf file looking like this

sudo vi /etc/resolv.conf

enter the following details

search test.com
nameserver 192.168.3.2

Posted by YoungMoon
:

4월 17일

cbnu 4th/Embedded System 2008. 4. 17. 14:28 |
ㅋㅋㅋ
Posted by YoungMoon
:

4월 15일 수업

cbnu 4th/Linux 2008. 4. 15. 10:40 |

소스파일에 <stdio.h>와 <stdlib.h>를 넣어야 한다

1,2장 개념

하드링크, 소프트링크 비교

함수 사용 방법

OX문제

4,5장에서 코드문제

 

#include <unistd.h>

#define BUF_SIZE    256


void printcwd()

{

    char buffer[BUF_SIZE];


    if(getcwd(buffer, BUF_SIZE) == NULL)

        exit(1);

   

    printf("%s\n", buffer);

}

int main()

{

    printcwd();

    chdir("/usr/include");

    printcwd();  //한번 출력한 후

    chdir("..");  //상위 디렉토리로 이동후(usr)

    printcwd();  //다시 출력

}
=========================================================================================
 

#include <unistd.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <dirent.h>


int main()

{

    char buffer[256];

    DIR *dirp;

    struct dirent *dentry;


    getcwd(buffer, 256);

    printf("%s\n", buffer);


    mkdir("apple", 0755);

    mkdir("banana", 0755);


    chdir("apple");


    getcwd(buffer, 256);

    printf("%s\n", buffer);


    close(open("test.txt", O_CREAT | O_RDWR, 0644));


    chdir("..");


    rmdir("apple");  //비워져 있지 않기 때문에 지워지지 않는다

    rmdir("banana");


    dirp = opendir("apple");


    while(dentry = readdir(dirp))

            if(dentry->d_ino != 0)

                    printf("%s\n", dentry->d_name);


    rewinddir(dirp); //위에 출력된걸 한번더 한다


    while(dentry = readdir(dirp))

            if(dentry->d_ino != 0)

                    printf("%s\n", dentry->d_name);


    closedir(dirp);

}


Posted by YoungMoon
:
실습보고서와 강의자료
Posted by YoungMoon
:
Posted by YoungMoon
:
http://www.site.uottawa.ca/~laganier/tutorial/opencv+directshow/cvision.htm
Posted by YoungMoon
:

riff란

cbnu 4th/Multimedia System 2008. 3. 25. 12:09 |
이것이다~ㅎㅎ
Posted by YoungMoon
: