Debian 8 Jessie
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Update System2015/05/01

[1] Update System via network.
root@dlp:~#
vi /etc/apt/sources.list
# comment out

#
deb cdrom:[Debian GNU/Linux 8.0.0 _Jessie_ - Official amd64 DVD Binary-1 20150425-12:54]/ jessie contrib main
# update list

root@dlp:~#
aptitude update

Hit http://security.debian.org jessie/updates Release.gpg
Hit http://security.debian.org jessie/updates Release
Hit http://ftp.jp.debian.org jessie Release.gpg
Hit http://ftp.jp.debian.org jessie-updates Release.gpg
Hit http://ftp.jp.debian.org jessie Release
Hit http://ftp.jp.debian.org jessie-updates Release
Hit http://ftp.jp.debian.org jessie/main Sources
Hit http://security.debian.org jessie/updates/main Sources
Hit http://ftp.jp.debian.org jessie/main amd64 Packages
Hit http://ftp.jp.debian.org jessie/main Translation-en
Hit http://ftp.jp.debian.org jessie-updates/main Sources
Hit http://ftp.jp.debian.org jessie-updates/contrib Sources
Hit http://ftp.jp.debian.org jessie-updates/main amd64 Packages
Hit http://ftp.jp.debian.org jessie-updates/contrib amd64 Packages
Hit http://security.debian.org jessie/updates/contrib Sources
Hit http://ftp.jp.debian.org jessie-updates/contrib Translation-en
Hit http://ftp.jp.debian.org jessie-updates/main Translation-en
Hit http://security.debian.org jessie/updates/main amd64 Packages
Hit http://security.debian.org jessie/updates/contrib amd64 Packages
Hit http://security.debian.org jessie/updates/contrib Translation-en
Hit http://security.debian.org jessie/updates/main Translation-en
.....
.....

# update system

root@dlp:~#
aptitude -y upgrade
Matched Content