I am trying to import Tkinter. However, I get an error stating that Tkinter has not been installed: ImportError: No module named This series covers the installation and usage of git on an Ubuntu 14.04 server. After completing the series, the reader should feel comfortable installing and using. Linux and UNIX apt- get command help and examples. About apt- getapt- get s yntaxapt- get examples. Related commands. Linux and Unix main page. About apt- getapt- get is the command- line tool for working with APT software packages. APT (the Advanced Packaging Tool) is an evolution of the Debian . It is a rapid, practical, and efficient way to install packages on your system. Prior to the Windows Registry.INI files stored each program's settings as a text file, often located in a shared location that did not provide user. If any single program defines the Debian Linux project, that program is apt-get. First I installed the jdk for Java 7 like this: sudo apt-get install openjdk-7-jdk. That might be enough: check and see if javac in your. Dependencies are managed automatically, configuration files are maintained, and upgrades and downgrades are handled carefully to ensure system stability. The indexes are fetched from the location(s) specified in /etc/apt/sources. An update should always be performed before an upgrade or dist- upgrade. If a package is currently installed and a new version is available, it is retrieved and upgraded. Under no circumstances are installed packages removed, or packages not already installed retrieved. New versions of currently installed packages that cannot be upgraded without changing the install status of another package will be left at their current version. An update should always be performed first so that apt- get knows which new versions of packages are available. Packages are specified by their package name, not a fully qualified file name (for instance, in a Debian system, . All packages required by the package(s) specified for installation will also be retrieved and installed. The /etc/apt/sources. If a hyphen is appended to the package name (with no intervening space), the identified package will be removed if it is installed. Similarly a plus sign can be used to designate a package to install. These annotation features may be used to override decisions made by apt- get's default conflict resolution system. A specific version of a package can be selected for installation by following the package name with an equals and the version of the package to select. This will cause that specific version to be located and installed. Alternatively, a specific distribution can be selected by following the package name with a slash and the version of the distribution or the Archive name (. You don't want to manually remove a package that another installed package is dependent on. If no package matches the given expression and the expression contains one of '.', '?' or '*' then it is assumed to be a POSIX- style regular expression, and it is applied to all package names in the database. Any matches are then installed (or removed). If this is undesired, anchor the regular expression with a '^' or '$' character, or create a more specific regular expression. Note that removing a package leaves its configuration files on the system. If a plus sign is appended to the package name (with no intervening space), the identified package will be installed instead of removed. APT will examine the available packages to decide which source package to fetch. It will then find and download into the current directory the newest available version of that source package while respecting the default release, as set with the option APT: :Default- Release, the - t option or per package with the pkg/release syntax. Source packages are tracked separately from binary packages via deb- src lines in the sources. If the - -compile option is specified then the package will be compiled to a binary . If - -download- only is specified then the source package will not be unpacked. A specific source version can be retrieved by postfixing the source name with an equals and then the version to fetch, similar to the mechanism used for the package files. This enables exact matching of the source package name and version, implicitly enabling the APT: :Get: :Only- Source option. Note that source packages are not installed and tracked in the dpkg database like binary packages; they are simply downloaded to the current directory, like source tarballs. By default the dependencies are satisfied to build the package natively. If desired a host- architecture can be specified with the - -host- architecture option instead. It removes everything but the lock file from /var/cache/apt/archives/ and /var/cache/apt/archives/partial/. When APT is used as a dselect method, clean is run automatically. If you don't use use dselect you will likely want to run apt- get clean from time to time to free up disk space. Like clean, autoclean clears out the local repository of retrieved package files. The difference is that it only removes package files that can no longer be downloaded, since they are largely useless. This allows a cache to be maintained over a long period without it growing out of control. The configuration option APT: :Clean- Installed will prevent installed packages from being erased if it is set to off. The server name and base directory is defined in the APT: :Changelogs: :Server variable. By default it displays the changelog for the version that is installed. However, you can specify the same options as for the install command. Options. All command line options may be set using the configuration file; the descriptions indicate the configuration option to set. For boolean options you can override the config file by using something like - f- ,- -no- f, or - f=no.- -no- install- recommends. Do not consider recommended packages as a dependency for installing. Configuration Item: APT: :Install- Recommends.- -install- suggests. Consider suggested packages as a dependency for installing. Configuration Item: APT: :Install- Suggests.- d, - -download- only. Download only; package files are only retrieved, not unpacked or installed. Configuration Item: APT: :Get: :Download- Only.- f, - -fix- broken. Fix; attempt to correct a system with broken dependencies in place. This option, when used with install/remove, can omit any packages to permit APT to deduce a likely solution. If packages are specified, these have to completely correct the problem. The option is sometimes necessary when running APT for the first time; APT itself does not allow broken package dependencies to exist on a system. It is possible that a system's dependency structure can be so corrupt as to require manual intervention (which usually means using dselect or dpkg - -remove to eliminate some of the offending packages). Use of this option together with - m may produce an error in some situations. Configuration Item: APT: :Get: :Fix- Broken.- m, - -ignore- missing, - -fix- missing. Ignore missing packages; if packages cannot be retrieved or fail the integrity check after retrieval (corrupted package files), hold back those packages and handle the result. Use of this option together with - f may produce an error in some situations. If a package is selected for installation (particularly if it is mentioned on the command line) and it could not be downloaded then it will be silently held back. Configuration Item: APT: :Get: :Fix- Missing.- -no- download. Disables downloading of packages. This is best used with - -ignore- missing to force APT to use only the . Configuration Item: APT: :Get: :Download.- q, - -quiet. Quiet; produces output suitable for logging, omitting progress indicators. More q's will produce more quiet up to a maximum of 2. You can also use - q=# to set the quiet level, overriding the configuration file. Note that quiet level 2 implies - y; you should never use - qq without a no- action modifier such as - d, - -print- uris or - s as APT may decide to do something you did not expect. Configuration Item: quiet.- s, - -simulate, - -just- print, - -dry- run, - -recon, - -no- act. No action; perform a simulation of events that would occur but do not actually change the system. Configuration Item: APT: :Get: :Simulate. Simulated runs performed as a user will automatically deactivate locking (Debug: :No. Locking), and if the option APT: :Get: :Show- User- Simulation- Note is set (as it is by default) a notice will also be displayed indicating that this is only a simulation. Runs performed as root do not trigger either No. Locking or the notice; superusers should know what they are doing without further warnings from apt- get. Simulated runs print out a series of lines, each representing a dpkg operation: configure (Conf), remove (Remv) or unpack (Inst). Square brackets indicate broken packages, and empty square brackets indicate breaks that are of no consequence, which is very rare.- y, - -yes, - -assume- yes. Automatic yes to prompts; assume . If an undesirable situation, such as changing a held package, trying to install a unauthenticated package or removing an essential package occurs then apt- get will abort. Configuration Item: APT: :Get: :Assume- Yes.- -assume- no. Automatic . By default is it not set which means that the host architecture is the same as the build architecture (which is defined by APT: :Architecture). Configuration Item: APT: :Get: :Host- Architecture.- b, - -compile, - -build. Compile source packages after downloading them. Configuration Item: APT: :Get: :Compile.- -ignore- hold. Ignore package holds; this causes apt- get to ignore a hold placed on a package. This may be useful in conjunction with dist- upgrade to override a large number of undesired holds. Configuration Item: APT: :Ignore- Hold.- -no- upgrade. Do not upgrade packages; when used in conjunction with install, no- upgrade will prevent packages on the command line from being upgraded if they are already installed. Configuration Item: APT: :Get: :Upgrade.- -only- upgrade. Do not install new packages; when used in conjunction with install, only- upgrade will install upgrades for already installed packages only and ignore requests to install new packages. Configuration Item: APT: :Get: :Only- Upgrade.- -force- yes. Force yes; this is a dangerous option that will cause apt to continue without prompting if it is doing something potentially harmful. It should not be used except in very special situations. Using force- yes can potentially destroy your system! Configuration Item: APT: :Get: :force- yes.- -print- uris. Instead of fetching the files to install, their URIs are printed.
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