Not significantly anyway, so to a large extent you need to understand (a) what you want to compress and (b) what compression algorithm would be the best choice for whatever reasons to use on it. The other big thing is you ask, How to compress any file very tightly? It doesn't work like that, some files (which is fundamentally data) are already compressed natively and will not compress any more regardless of which compression algorithm you chose. Various compression software/methods off top of my head you could web search on are Possibly the best might be 7-zip, but you would have to install it as it usually does not come automatically installed as one of the base software programs in linux, and then you would need to understand which compression algorithm to choose and what settings on that to use as well. You are basically asking about file compression software and there are many, each having pro's and con's, some better than others for various reasons. Giving that the -9 option would mean max, do a man gzip to read more. For this one its process is quite easy, we just need to understand that a CBZ file IS a ZIP file with images in it. How to convert CBR or CBZ to PDF in Calibre Here are of major steps to convert CBR or CBZ to PDF in Sizing: Download and install. Besides so, you can also use it to readers eBooks, organize and manage respective eBook library, remove books DRM, edit ebook metadata, etc. redhat/centos, fedora, suse, debian, ubuntu, mint, whatever. 1 GO SEE UPDATE PART Assuming your OS is Windows, we can do it with Batch or PowerShell. Aforementioned good thing is that it lets they batch convert CBR for PDF. CBR (A comic book archive or comic novel reader) and CBZ (Comic Read Zip) are store formats the store comic novel content. Gzip would be available for whatever linux distribution you are using. Here is a complete guide to converting your CBR and CBZ comic related on PDF arrangement on your PC.

Batch convert cbr to cbz