I would like to optimize a SVG using software on Ubuntu (and by optimize I mean to reduce the file size without loosing any visible parts of the graphic) and I do mean software I know there are some websites that can do this but I don't trust my internet connection always being good enough for this to work for me. I would also like to keep the file format SVG, I know that SVGZ is usually substantially smaller than its uncompressed counterpart but I am uploading these SVGs to a local MediaWiki installation and it cannot thumbnail SVGZ files to my knowledge (if I'm wrong please do correct me).
I can't think of something better than inkscape.
Inkscape is an open-source vector graphics editor similar to Adobe Illustrator, Corel Draw, Freehand, or Xara X. What sets Inkscape apart is its use of Scalable Vector Graphics (SVG), an open XML-based W3C standard, as the native format.
You can install it usind command:
sudo apt-get install inkscape
Take a look for this link for tips to optimize SVG using inkscape.
for comamnd line I think you should take a look for scour
scour --help scour 0.26 Copyright Jeff Schiller, Louis Simard, 2010 Usage: scour [-i input.svg] [-o output.svg] [OPTIONS] If the input/output files are specified with a svgz extension, then compressed SVG is assumed. If the input file is not specified, stdin is used. If the output file is not specified, stdout is used. Options: --version show program's version number and exit -h, --help show this help message and exit --disable-simplify-colors won't convert all colors to #RRGGBB format --disable-style-to-xml won't convert styles into XML attributes --disable-group-collapsing won't collapse <g> elements --create-groups create <g> elements for runs of elements with identical attributes --enable-id-stripping remove all un-referenced ID attributes --enable-comment-stripping remove all <!-- --> comments --shorten-ids shorten all ID attributes to the least number of letters possible --disable-embed-rasters won't embed rasters as base64-encoded data --keep-editor-data won't remove Inkscape, Sodipodi or Adobe Illustrator elements and attributes --remove-metadata remove <metadata> elements (which may contain license metadata etc.) --renderer-workaround work around various renderer bugs (currently only librsvg) (default) --no-renderer-workaround do not work around various renderer bugs (currently only librsvg) --strip-xml-prolog won't output the <?xml ?> prolog --enable-viewboxing changes document width/height to 100%/100% and creates viewbox coordinates -p DIGITS, --set-precision=DIGITS set number of significant digits (default: 5) -q, --quiet suppress non-error output --indent=INDENT_TYPE indentation of the output: none, space, tab (default: space) --protect-ids-noninkscape Don't change IDs not ending with a digit --protect-ids-list=PROTECT_IDS_LIST Don't change IDs given in a comma-separated list --protect-ids-prefix=PROTECT_IDS_PREFIX Don't change IDs starting with the given prefix
Also take a look for this SE question , it may help.
gzip -S z ./examples/*/*.svg