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yum -y install ethereal*

[root@localhost yum.repos.d]# ls -l
total 20
-rw-r--r-- 1 root root 2389 Dec 23 22:29 CentOS-Base.repo
-rw-r--r-- 1 root root  626 Mar 17  2009 CentOS-Media.repo

(1) yum install yum-priorities



(2) vi /etc/yum/pluginconf.d/priorities.conf
여기서 
[main]
enabled=1
라고 되어 있는지 확인


(3) cd /etc/yum.repos.d/


두개 파일에서 CentOS-Base.repo 과 CentOS-Media.repo 을 열어서 마지막 라인에 


다음과 같이 추가


priority=1

(4) wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.1-1.el5.rf.i386.rpm

(5) rpm --import http://dag.wieers.com/rpm/packages/RPM-GPG-KEY.dag.txt

(6) rpm -K rpmforge-release-0.5.1-1.el5.rf.*.rpm

(7) yum check-update

[root@localhost ~]# more /etc/sysconfig/i18n
LANG="en_US.UTF-8"
SYSFONT="latarcyrheb-sun16"
SUPPORTED="en_US.UTF-8:en_US.en:ko_KR.UTF-8:ko_KR.eucKR:ko_KR:ko"

export LANG=ko_KR.eucKR

sed -n '1p' filename

sed -n '$p' filename

sed -n '2p' filename

sed -n '1,3p' filename

sed '1,3d' filename

sed -n '/root/p' filename

sed -n ‘/love/,/peace/p’ datafile

sed '/^$d' 파일명 > 새파일명

sed 's/TEST/test/g' > 새파일명

sed 's/TEST//g' > 새파일명

# sed --help
Usage: sed [OPTION]... {script-only-if-no-other-script} [input-file]...

  -n, --quiet, --silent
                 suppress automatic printing of pattern space
  -e script, --expression=script
                 add the script to the commands to be executed
  -f script-file, --file=script-file
                 add the contents of script-file to the commands to be executed
  -i[SUFFIX], --in-place[=SUFFIX]
                 edit files in place (makes backup if extension supplied)
  -c, --copy
                 use copy instead of rename when shuffling files in -i mode
                 (avoids change of input file ownership)
  -l N, --line-length=N
                 specify the desired line-wrap length for the `l' command
  --posix
                 disable all GNU extensions.
  -r, --regexp-extended
                 use extended regular expressions in the script.
  -s, --separate
                 consider files as separate rather than as a single continuous
                 long stream.
  -u, --unbuffered
                 load minimal amounts of data from the input files and flush
                 the output buffers more often
      --help     display this help and exit
      --version  output version information and exit