apt is a mainly-online-repository-based („AppStore“) software installation – package management system used by Debian and Ubuntu.
But – you can also manually download a package.deb and install it with dpkg -i package.deb.
What might be confusing – it consists of three commands – dpkg – apt – aptitude.
basically dpkg = rpm the low-level package-install-utility. (both can NOT resolve dependencies)
apt is better and aptitude is best at resolving dependencies.
if there are conflicts – aptitude will let you choose what constellation you would prefer…
per default packages are downloaded to this folder:
ll /var/cache/apt/archives/|less find / -name *.deb; # start to find downloaded packages.deb
contains a list with all available sources of software – may it be a CD or an online-repository.
depending on what you want to install – you will have to modify this file until it works. 😀
cat /etc/apt/sources.list # deb cdrom:[Debian GNU/Linux 8.7.1 _Jessie_ - Official i386 NETINST Binary-1 20170116-10:07]/ jessie main # deb cdrom:[Debian GNU/Linux 8.7.1 _Jessie_ - Official i386 NETINST Binary-1 20170116-10:07]/ jessie main deb http://ftp.uni-erlangen.de/debian/ jessie main deb-src http://ftp.uni-erlangen.de/debian/ jessie main deb http://security.debian.org/ jessie/updates main deb-src http://security.debian.org/ jessie/updates main # jessie-updates, previously known as 'volatile' deb http://ftp.uni-erlangen.de/debian/ jessie-updates main deb-src http://ftp.uni-erlangen.de/debian/ jessie-updates main
# install a manually downloaded package
dpkg -i package.deb
# list all installed packages
dpkg -p bsdgames; # give details about that package dpkg -L nsnake; # what files and folders belong to this package/came with that package /. /usr /usr/games /usr/games/nsnake /usr/share /usr/share/games /usr/share/games/nsnake ... dpkg-reconfigure tzdata; # reconfigure / resetup that package, in this case you can change the time-zone
the most important command is:
apt-get -f install; # magically fix all problems apt-get update; # update list of available packages # needs to be done before any update or install - updates the local apt-cache database of available packages - to know if there are updates available apt-cache search package; # search for that package apt-get install package; # install that package apt-get remove package; # uninstall but keep config files apt-get purge package; # uninstall but also delete config files apt-get autoremove; # is used to remove packages that were automatically installed to satisfy dependencies for other packages and are now no longer needed. apt-get clean; # free up disk space - remove all locally downloaded *.deb files apt-cache policy bsdgames; # what version is installed and from what repository it came from bsdgames: Installed: 2.17-22 Candidate: 2.17-22 Version table: *** 2.17-22 0 500 http://ftp.uni-erlangen.de/debian/ jessie/main i386 Packages 100 /var/lib/dpkg/status apt-cache show bsdgames; # show more informations about that package Package: bsdgames Version: 2.17-22 Installed-Size: 2378 Maintainer: Debian Games Team <firstname.lastname@example.org> Architecture: i386 Depends: libc6 (>= 2.11), libgcc1 (>= 1:4.1.1), libncurses5 (>= 5.5-5~), libstdc++6 (>= 4.1.1), libtinfo5, wamerican | wordlist Description-en: collection of classic textual unix games This is a collection of some of the text-based games and amusements that have been enjoyed for decades on unix systems. . It includes these programs: adventure, arithmetic, atc, backgammon, battlestar, bcd, boggle, caesar, canfield, countmail, cribbage, dab, go-fish, gomoku, hack, hangman, hunt, mille, monop, morse, number, pig, phantasia, pom, ppt, primes, quiz, random, rain, robots, rot13, sail, snake, tetris, trek, wargames, worm, worms, wump, wtf Description-md5: baad5e80259494938d2b2c34b0259cb7 Tag: game::adventure, game::board, game::puzzle, game::rpg, game::simulation, game::sport, game::toys, game::typing, implemented-in::c, implemented-in::shell, interface::commandline, interface::text-mode, role::program, suite::bsd, uitoolkit::ncurses, use::gameplaying Section: games Priority: optional Filename: pool/main/b/bsdgames/bsdgames_2.17-22_i386.deb Size: 930174 MD5sum: 8fd0dddf8d67197ee11bfbaadc9702ee SHA1: 565158d7ea60702fc412f93aaa2ef0d9794fafd6 SHA256: d045d6076407bacab9eade5b91ff2b828b5c2adb942a663821c11f4fb78b813c apt-cache showpkg package; # same as: apt show -a package apt-cache showpkg bsdgames Package: bsdgames Versions: 2.17-22 (/var/lib/apt/lists/ftp.uni-erlangen.de_debian_dists_jessie_main_binary-i386_Packages) (/var/lib/dpkg/status) Description Language: File: /var/lib/apt/lists/ftp.uni-erlangen.de_debian_dists_jessie_main_binary-i386_Packages MD5: baad5e80259494938d2b2c34b0259cb7 Description Language: en File: /var/lib/apt/lists/ftp.uni-erlangen.de_debian_dists_jessie_main_i18n_Translation-en MD5: baad5e80259494938d2b2c34b0259cb7 Reverse Depends: filters,bsdgames junior-math,bsdgames junior-games-text,bsdgames games-simulation,bsdgames games-rpg,bsdgames games-puzzle,bsdgames games-finest-light,bsdgames games-finest,bsdgames games-console,bsdgames games-board,bsdgames games-adventure,bsdgames Dependencies: 2.17-22 - libc6 (2 2.11) libgcc1 (2 1:4.1.1) libncurses5 (2 5.5-5~) libstdc++6 (2 4.1.1) libtinfo5 (0 (null)) wamerican (16 (null)) wordlist (0 (null)) Provides: 2.17-22 - Reverse Provides:
if you run aptitude without any options it will start in grafical mode
if you type /search
you can search
has actually similar syntax than apt
aptitude update; # update local cache of available packages aptitude install package; # install package aptitude remove package; # remove package
use case examples:
# update / upgrade only certain single package apt-get update apt-get install --only-upgrade packagename; # update only this package
# checkout what file belongs to what package (yum can sometimes do that better (yum provides /etc/named.conf)) dpkg -S /usr/bin/lspci; # you could try this... but it does not succeed on config files. pciutils: /usr/bin/lspci apt-get install apt-file; apt-file update; apt-file search /usr/share/samba/setup/named.conf samba: /usr/share/samba/setup/named.conf samba: /usr/share/samba/setup/named.conf.dlz samba: /usr/share/samba/setup/named.conf.update dpkg -l |grep samba ii python-samba 2:4.2.14+dfsg-0+deb8u6 i386 Python bindings for Samba ii samba 2:4.2.14+dfsg-0+deb8u6 i386 SMB/CIFS file, print, and login server for Unix apt-file search /etc/hosts debian-lan-config: /usr/share/debian-lan-config/fai/config/files/etc/hosts/diskless debian-lan-config: /usr/share/debian-lan-config/fai/config/files/etc/hosts/mainserver fai-doc: /usr/share/doc/fai-doc/examples/etc/hosts puppet-testsuite: /usr/share/puppet-testsuite/spec/fixtures/unit/provider/augeas/augeas/etc/hosts rsh-server: /etc/hosts.equiv switchconf: /usr/share/doc/switchconf/examples/home/etc/hosts switchconf: /usr/share/doc/switchconf/examples/work/etc/hosts dpkg -l |grep debian-lan-config root@debian8:/etc# apt-cache search debian-lan-config debian-lan-config - FAI config space for the Debian-LAN system