debtags - Debian Package Tags support tools
usage: debtags [-h] [--version] [--verbose] [--debug] {tag,cat,grep,check,diff,mkpatch,search,dumpavail,show,submit,tagcat,tagshow,tagsearch,update,vocfilter} ... Command line interface to access and manipulate Debian Package Tags optional arguments: -h, --help show this help message and exit --version show program's version number and exit --verbose, -v enable verbose output --debug enable debugging output (including verbose output) subcommands: valid subcommands {tag,cat,grep,check,diff,mkpatch,search,dumpavail,show,submit,tagcat,tagshow,tagsearch,update,vocfilter} additional help tag (not implemented anymore) cat (grep) output the lines of the full package tag database that match the given tag expression. A tag expression (given as a single argument) is an arbitrarily complex binary expression of tag names. For example: role::program && ((use::editing || use::viewing) && !works-with::text) check Check that all the tags in the given tagged collection are present in the tag vocabulary. Checks the main database if no file is specified diff (mkpatch) Create a tag patch between the current tag database and the tag collection [filename]. Standard input is used if filename is not specified search (dumpavail) Output the packages matching the given tag expression show (deprecated) mostly the same as apt-cache show <pkgnames> submit (no longer supported) see https://debtags.debian.org/api/patch for patch submit. tagcat Output the tag vocabulary tagshow Show the vocabulary information about a tag tagsearch Show a summary of all tags whose data contains the given strings update Updates the package tag database (requires root) Collect package tag data from apt cache, regenerate the debtags tag database and main index. It needs to be run as root vocfilter Filter out the tags that are not found in the given vocabulary file debtags manages package tag data in a debian system and performs basic queries on it. debtags can be used to perform basic queries on the Debtags system: the vocabulary can be queried with the tagshow and tagsearch commands; a package tag database can be checked against the vocabulary with the check command; the whole collection can be copied to standard output to be processed with tagcoll or other tools by the cat command; packages can be searched by tags using the grep command. Finally, tags can be listed with tag ls, edited with the tag add and tag rm, and submitted to the Debtags database with submit. The update command can be used to download extra tags as listed in /etc/debtags/sources.list: see the contents of that file for more information.
/var/lib/debtags/vocabulary The normative tag vocabulary /var/lib/debtags/package-tags The system package tags database, only kept as an easily parsable reference. In the same directory there is a the binary index with the same content, used by applications for fast access. /etc/debtags/sources.list The list of sources to build the package tags database from
Here are some example invocations of debtags: # Update the package tag database debtags update # Show apt-cache information about the mutt package, # adding tag information debtags show mutt # Search the tag vocabulary for mail-related tags debtags tagsearch mail # Output a list of all packages which can edit raster images, excluding # shared libraries and dummy packages debtags search "use::editing && works-with::image:raster && \ ! (role::shared-lib || role::dummy)" # Show all mail clients debtags search 'works-with::mail && network::client' # Output the collection of all mail clients, ready to be reprocessed via # tagcoll debtags grep 'works-with::mail && network::client' # Produce an easily navigable hierarchy with the collection data debtags cat | tagcoll hierarchy # Produce a local tag patch debtags cat > work-tags ...edit work-tags... debtags diff work-tags > my-tagpatch # Submit the patch debtags submit my-tagpatch # Edit the tags of a package (the patch will be stored in ~/.debtags/patch) # then send your changes debtags tag add debtags implemented-in::c++ interface::commandline debtags tag rm debtags devel::buildtools debtags submit
tagcoll(1), axi-cache(1), http://wiki.debian.org/Debtags http://debtags.debian.net
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.
Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.
Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.