White Life Story

tcpdump 옵션

# tcpdump -i eth0 -s 65535 tcp port 3000 -X

• -i: network interface (ex: -i lo)
• -s: packet length (ex: -s 65535)
• port: (ex: tcp port 3000)
• -X: hexcode

-s 옵션은 전체 packet를 봐야할 경우에만 65535로 정의

tcpdump 사용하기

# tcpdump -i lo -s 65535 tcp port 3000 -X
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on lo, link-type EN10MB (Ethernet), capture size 65535 bytes

// ... packet

0 packets captured
0 packets received by filter
0 packets dropped by kernel

network interface (lo), -s 65535 (packet length) 전체 패킷을 보는경우 사용, tcp port 3000 (모니터링 포트), -X (hexcode) 로 출력, 자주 사용하는 옵션이다.

Linux 시작 스크립트 적용 시 발생 했다. 윈도우와 리눅스의 줄 바꿈이 다르기 때문에 발생 한다.

$ vi -b filename
:%s/^M//g

위와 같이 실행 하면 ^M 이 제거되고 정상적으로 동작 한다.

참고 사이트

• http://tod2.tistory.com/28
• http://www.guideline.co.kr/howto/howto_contents.php?in=&keyword=&page=1&idx=108&up_cnt=88

설치 되어 있는 X-Window 시스템이 지원하지 않는 버전 이기 때문에 발생 한다.

sudo /opt/VBoxGuestAdditions-4.3.6/uninstall.sh
sudo apt-get install virtualbox-guest-additions-iso
sudo software-properties-gtk --open-tab=4

위 명령어를 사용하여 설치 하고, 사용 되지 않음으로 설정 되어 있 Guest 드라이버를 활성화 후 Reboot 하자

Developer Tool Install

gcc, make 등 기본적인 package 를 포함 하고 있다.

whitelife@dev:~$ sudo apt-get install build-essential

참고 사이트

• http://ubuntufs.wordpress.com/2006/05/21/installing-basic-development-tools/

1. 저장소 설정 파일 열기

whitelife@dev:~$ sudo vim /etc/apt/sources.list

2. 저장소 설정 수정 하기

설치 완료 시 기본적으로 설정 되는 주소 이다. 너무 느리기도 하고, 저장소에 없는 라이브러리가 있어, 주로 변경 후 사용 한다. 국내에서는 보통 ftp.daum.net 를 사용 한다.

# deb cdrom:[Ubuntu-Server 12.04.5 LTS _Precise Pangolin_ - Release i386 (20140806.1)]/ precise main restricted

#deb cdrom:[Ubuntu-Server 12.04.5 LTS _Precise Pangolin_ - Release i386 (20140806.1)]/ precise main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://kr.archive.ubuntu.com/ubuntu/ precise main restricted
deb-src http://kr.archive.ubuntu.com/ubuntu/ precise main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://kr.archive.ubuntu.com/ubuntu/ precise-updates main restricted
deb-src http://kr.archive.ubuntu.com/ubuntu/ precise-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://kr.archive.ubuntu.com/ubuntu/ precise universe
deb-src http://kr.archive.ubuntu.com/ubuntu/ precise universe
deb http://kr.archive.ubuntu.com/ubuntu/ precise-updates universe
deb-src http://kr.archive.ubuntu.com/ubuntu/ precise-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://kr.archive.ubuntu.com/ubuntu/ precise multiverse
deb-src http://kr.archive.ubuntu.com/ubuntu/ precise multiverse
deb http://kr.archive.ubuntu.com/ubuntu/ precise-updates multiverse
deb-src http://kr.archive.ubuntu.com/ubuntu/ precise-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://kr.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://kr.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu precise-security main restricted
deb-src http://security.ubuntu.com/ubuntu precise-security main restricted
deb http://security.ubuntu.com/ubuntu precise-security universe
deb-src http://security.ubuntu.com/ubuntu precise-security universe
deb http://security.ubuntu.com/ubuntu precise-security multiverse
deb-src http://security.ubuntu.com/ubuntu precise-security multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu precise partner
# deb-src http://archive.canonical.com/ubuntu precise partner

## Uncomment the following two lines to add software from Ubuntu's
## 'extras' repository.
## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
# deb http://extras.ubuntu.com/ubuntu precise main
# deb-src http://extras.ubuntu.com/ubuntu precise main

vi 에서 아래와 같은 정규식을 사용하여 수정 하자.

:%s/kr.archive.ubuntu.com/ftp.daum.net/g

1. password 설정 하기

whitelife@dev:~$ sudo passwd root
새 UNIX 암호 입력:
새 UNIX 암호 재입력:
passwd: password updated successfully
whitelife@dev:~$

2. 확인 하기

whitelife@dev:~$ su - root
암호:
root@dev:~#

1. Install

whitelife@miniserver$ sudo apt-get install unrar

2. 압축 풀기

whitelife@miniserver:~$ sudo unrar e -r ./xxx.rar

참고 사이트

• http://askubuntu.com/questions/41791/whats-the-easiest-way-to-unrar-a-file

1. IP 설정 하기

whitelife@miniserver$ sudo vim /etc/network/interfaces

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto wlan0
iface wlan0 inet static
        # wireless-* options are implemented by the wireless-tools package
        wireless-mode managed
        wireless-essid xxxxx
        wireless-key1 s:xxxxxxxxxxxxx
        address xxx.xxx.xxx.xxx
        netmask xxx.xxx.xxx.xxx
        gateway xxx.xxx.xxx.xxx

2. DNS 설정 하기

whitelife@miniserver:~$ sudo vim /etc/resolv.conf

Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver xxx.xxx.xxx.xxx
nameserver xxx.xxx.xxx.xxx

3. Networking Restart

whitelife@miniserver:~$ sudo /etc/init.d/networking restart

참고 사이트

• http://www.howtoforge.com/linux-basics-set-a-static-ip-on-ubuntu