How to install Sigil 0.9.7 EPUB Ebook Editor on Ubuntu 16.10 and 16.04

    Sigil is a free, open source, multi-platform ebook editor. It is designed to edit books in ePub format (both ePub 2 and ePub 3).

This Sigil-0.9.7 release is a mix of bug fixes and new features for both epub2 and epub3 users.

Bug Fixes

•     Allow tags in the svg and mathml namespace to automtically self-close if empty to help work around a bug in Kindlegen that will not seem to accept a closing svg image tag even though image is non-void
•     Prevent TextTab from constantly recentering page when focus is lost
•     Fix bugs in plugin basename_to_id when used with xpgt files or any unrecognized extensions
•     Fix typos in pls mimetype in plugins
•     Fix code synchronization issues among 3 places where file extensions are mapped to mimetypes
•     Fix plugin readotherfile interface to rebuild the opf on the fly only if it has been modified
•     Fix plugin validation issues with integer vs string representations of line number and character offsets
•     Fix duplicate filename in multiple directories bug when updating CSS urls
•     Fix bug in page-map.xml mimetype when “Add Existing …” is used
•     Fix undefined behaviour shifting signed negative values in 3rdparty libs and fix many warnings
•     Fix text vs binary file type recognition in the plugin interface (CSS and js files are text not binary)
•     Fix too small toolbar icons on high dpi displays
•     Fix bug that caused text highlighting to get lost on some systems when doing a CSS Find & Replace.
•     Fix bug in plugin interface basename_to_id to recognize .htm extensions
•     Fix bug in epub3 semantic popups to always refect the local name of epub:type setting
•     Fix bug where creation on an HTML TOC could overwrite an existing Nav under epub3
•     Fix manifest id not starting with alpha character bug

New Features

•     Extend validation plugin interface with add_extended_result() method to allow better cursor positioning
•     Extend TextTab and Tabs derived by it to position cursor based on offset
•     Allow editing of page-map.xml files, xpgt files and other misc xml based files inside Sigil
•     Update Windows builds use Python 3.5.2, VS2015
•     Update Mac OS X builds and build instructions to use Python-3.5.2
•     Remove support for python2.7 only plugins and simply Manage Plugins settings
•     Update to Qt 5.6.1-1 with QtWebKit added back for release builds for Windows (VS2015) and Mac OSX
•     Update Mac OS X and Linux build instruction documentation for recent changes
•     Allow Linux Dictionaries to look up default paths for dictionaries passed in by build cmake settings
•     Make the columns in the Manage Plugins table be sortable by the user
•     Better detect undefined and non-existing url fragments to prevent issues when splitting or merging files
•     Make tooltips for Run Plugin Icons show the name of the selected plugin on hover
•     Upgrade from jquery 1.6.2 to version 2.2.4
•     Upgrade from jquery.scrollTo 1.4.2 to version 2.1.2
•     Upgrade to double sized 48×48 pixel icons for High DPI displays, Special Thanks to PatNY for creating our icons

Installation instructions: 
 
We can add this PPA to Ubuntu Operating  Systems and install  Sigil 0.9.7 with few easy commands.

Open terminal(Ctrl+Alt+T) and insert command line...

$ sudo add-apt-repository ppa:ubuntuhandbook1/sigil $ sudo apt-get update $ sudo apt-get install sigil flightcrew

 Option, remove the PPA after installing  Sigil 0.9.7 via command:

$ sudo apt-get install ppa-purge $ sudo ppa-purge ppa:ubuntuhandbook1/sigil