There are plenty of off-line Debian systems just waiting to update index files, upgrade or install additional packages. This can be easily achieved by using apt-offline utility. I will shortly describe common usage scenario as it is very handy application.
Preparations
Visit Debian packages web-site and download apt-offline utility.
Use lsb_release command to confirm release/codename information.
$ lsb_release -d Description: Debian GNU/Linux 7.3 (wheezy)
Installation
Move apt-offline package to the off-line Debian system and install it.
off-line$ sudo dpkg -i apt-offline_1.2_all.deb (Reading database ... 24586 files and directories currently installed.) Unpacking apt-offline (from apt-offline_1.2_all.deb) ... Setting up apt-offline (1.2) ... Processing triggers for man-db ...
Important notice
apt-offline uses /etc/apt/trusted.gpg file as keyring instead of files in the /etc/apt/trusted.gpg.d/ directory.
You can easily identify this problem when you will see similar program output:
$ sudo apt-offline install bundle.zip [...] gpgv: Signature made Sat Dec 14 11:52:03 2013 CET using RSA key ID 46925553 gpgv: Can't check signature: public key not found gpgv: Signature made Sat Dec 14 12:01:01 2013 CET using RSA key ID 65FFB764 gpgv: Can't check signature: public key not found ERROR: /var/lib/apt/lists/partial/ftp.icm.edu.pl_pub_Linux_debian_dists_wheezy_Release.gpg bad signature. Not syncing because in strict mode. [...]
Solution to this issue is very simple as you need to alter /etc/apt/trusted.gpg file to import missing keys.
$ sudo apt-key exportall | sudo gpg --no-default-keyring --import --keyring /etc/apt/trusted.gpg gpg: keyring `/root/.gnupg/secring.gpg' created gpg: key 473041FA: public key "Debian Archive Automatic Signing Key (6.0/squeeze) <ftpmaster@debian.org>" imported gpg: key B98321F9: public key "Squeeze Stable Release Key <debian-release@lists.debian.org>" imported gpg: key 46925553: public key "Debian Archive Automatic Signing Key (7.0/wheezy) <ftpmaster@debian.org>" imported gpg: key 65FFB764: public key "Wheezy Stable Release Key <debian-release@lists.debian.org>" imported gpg: Total number processed: 4 gpg: imported: 4 (RSA: 4) gpg: no ultimately trusted keys found
Package index synchronization
Define action on the off-line system
To update package index you need to issue update action and specify signature file that will be used later on the on-line Debian system.
off-line$ sudo apt-offline set debian-update.sig --update Generating database of files that are needed for an update.
Execute download action on the on-line system
Move generated signature file debian-update.sig to the on-line Debian system.
Fetch required APT data described in the signature file (using two threads in the following example) and store it as debian-update.zip file.
on-line$ apt-offline get debian-update.sig --bundle debian-update.zip --threads 2 Fetching APT Data Downloading http://security.debian.org/dists/wheezy/updates/main/source/Sources.bz2. http://security.debian.org/dists/wheezy/updates/main/source/Sources.bz2 done. Downloading http://security.debian.org/dists/wheezy/updates/main/binary-i386/Packages.bz2. http://security.debian.org/dists/wheezy/updates/main/binary-i386/Packages.bz2 done. [...] Downloading http://ftp.icm.edu.pl/pub/Linux/debian/dists/wheezy-updates/Release. http://ftp.icm.edu.pl/pub/Linux/debian/dists/wheezy-updates/Release done. Downloading http://ftp.icm.edu.pl/pub/Linux/debian/dists/wheezy-updates/Release.gpg. http://ftp.icm.edu.pl/pub/Linux/debian/dists/wheezy-updates/Release.gpg done. Downloaded data to /home/milosz/debian-update.zip
Execute install process on the off-line system
Move debian-update.zip file to the off-line Debian system and finish package index update process.
off-line$ sudo apt-offline install 1.zip gpgv: Signature made Tue Jan 28 15:56:35 2014 CET using RSA key ID 46925553 gpgv: Good signature from "Debian Archive Automatic Signing Key (7.0/wheezy) $lt;ftpmaster@debian.org>" [...] /var/lib/apt/lists/partial/security.debian.org_dists_wheezy_updates_Release synced. /var/lib/apt/lists/partial/security.debian.org_dists_wheezy_updates_Release.gpg synced. /var/lib/apt/lists/partial/security.debian.org_dists_wheezy_updates_main_binary-i386_Packages synced. /var/lib/apt/lists/partial/security.debian.org_dists_wheezy_updates_main_i18n_Translation-en synced. /var/lib/apt/lists/partial/security.debian.org_dists_wheezy_updates_main_source_Sources synced. [...]
System upgrade
Define action on the off-line system
To upgrade off-line Debian system execute upgrade action and define signature file.
off-line$ sudo apt-offline set debian-upgrade.sig --upgrade
Execute download action on the on-line system
Upload debian-upgrade.sig to the on-line Debian system and download required files.
on-line$ apt-offline get debian-upgrade.sig --bundle debian-upgrade.zip --threads 3
Execute install process on the off-line system
Upload debian-upgrade.zip bundle to the off-line system and install it using apt-offline utility to update APT database.
off-line$ sudo apt-offline install debian-upgrade.zip
Now you can start upgrade process as every required package is already downloaded.
off-line$ sudo apt-get upgrade
There are couple of exceptions to the above statement like flash player as it cannot be installed in an off-line mode.
Package installation
Define action on the off-line system
To install mc and hdparm packages on the off-line Debian system execute install-packages action and define signature file.
off-line$ apt-offline set debian-install.sig --install-packages mc hdparm Generating database of package mc, hdparm, and its dependencies.
Execute download action on the on-line system
Upload debian-install.sig to the on-line Debian system and download required files.
on-line$ apt-offline get debian-install.sig --bundle debian-install.zip Fetching APT Data Downloading libffi5 3.0.10-3 - 20 KiB libffi5 3.0.10-3 done. Downloading libglib2.0-0 2.33.12+really2.32.4-5 - 1 MiB libglib2.0-0 2.33.12+really2.32.4-5 done. Downloading hdparm 9.39-1+b1 - 110 KiB hdparm 9.39-1+b1 done. Downloading libglib2.0-data 2.33.12+really2.32.4-5 - 1 MiB libglib2.0-data 2.33.12+really2.32.4-5 done. Downloading mc-data 3%3a4.8.3-10 - 1 MiB mc-data 3%3a4.8.3-10 done. Downloading mc 3%3a4.8.3-10 - 460 KiB mc 3%3a4.8.3-10 done. Downloading powermgmt-base 1.31 - 11 KiB powermgmt-base 1.31 done. Downloading shared-mime-info 1.0-1+b1 - 590 KiB shared-mime-info 1.0-1+b1 done. Downloading unzip 6.0-8 - 182 KiB unzip 6.0-8 done. Downloaded data to /home/milosz/debian-install.zip
Execute install process on the off-line system
Upload debian-install.zip file to the off-line Debian system, install it using apt-offline utility to update APT database.
off-line$ sudo apt-offline install debian-install.zip /var/cache/apt/archives/libffi5_3.0.10-3_i386.deb file synced. /var/cache/apt/archives/libglib2.0-0_2.33.12+really2.32.4-5_i386.deb file synced. /var/cache/apt/archives/hdparm_9.39-1+b1_i386.deb file synced. /var/cache/apt/archives/libglib2.0-data_2.33.12+really2.32.4-5_all.deb file synced. /var/cache/apt/archives/mc-data_3%3a4.8.3-10_all.deb file synced. /var/cache/apt/archives/mc_3%3a4.8.3-10_i386.deb file synced. /var/cache/apt/archives/powermgmt-base_1.31_i386.deb file synced. /var/cache/apt/archives/shared-mime-info_1.0-1+b1_i386.deb file synced. /var/cache/apt/archives/unzip_6.0-8_i386.deb file synced.
Now you can install specified packages using regular apt-get utility.
off-line$ sudo apt-get install mc hdparm Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: libffi5 libglib2.0-0 libglib2.0-data mc-data powermgmt-base shared-mime-info unzip Suggested packages: apmd zip arj xpdf pdf-viewer dbview odt2txt gv catdvi djvulibre-bin imagemagick python-boto python-tz The following NEW packages will be installed: hdparm libffi5 libglib2.0-0 libglib2.0-data mc mc-data powermgmt-base shared-mime-info unzip 0 upgraded, 9 newly installed, 0 to remove and 0 not upgraded. Need to get 0 B/5931 kB of archives. After this operation, 23.2 MB of additional disk space will be used. Do you want to continue [Y/n]? Selecting previously unselected package libffi5:i386. (Reading database ... 24694 files and directories currently installed.) [...] Processing triggers for man-db ... Processing triggers for mime-support ... Setting up libffi5:i386 (3.0.10-3) ... Setting up libglib2.0-0:i386 (2.33.12+really2.32.4-5) ... No schema files found: doing nothing. Setting up hdparm (9.39-1+b1) ... Setting up libglib2.0-data (2.33.12+really2.32.4-5) ... Setting up mc-data (3:4.8.3-10) ... Setting up mc (3:4.8.3-10) ... update-alternatives: using /usr/bin/mcview to provide /usr/bin/view (view) in auto mode Setting up powermgmt-base (1.31) ... Setting up shared-mime-info (1.0-1+b1) ... Setting up unzip (6.0-8) ...
GUI interface
Surprisingly, there is a nice graphical user interface available in Debian package repository.
To install it execute the following command.
$ sudo apt-get install apt-offline-gui