How to compress JPEG images from the command line on Linux

Question: I have several JPEG photo images I have taken using a digital camera. I would like to optimize and compress the JPEG pictures before uploading them to Dropbox. What is the easiest way to compress JPEG images without losing their quality on Linux? Image resolution of today’s picture taking gadgets (e.g., smartphones, digital cameras) […]
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How to install 7zip on Linux

Question: I need to extract files from an ISO image, and for that I want to use 7zip program. How can I install 7zip on [insert your Linux distro]? 7zip is an open-source archive program originally developed for Windows, which can pack or unpack a variety of archive formats including its native format 7z as […]
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