If you are using Ubuntu, open a terminal and type:
sudo add-apt-repository ppa:micahflee/ppa
sudo apt update
sudo apt install -y onionshare
If you are using Fedora, install it from Software or open a terminal and type:
sudo dnf install onionshare
If you are using a different version of Linux, follow these build instructions to install.
"When Glenn Greenwald discovered last year that some of the NSA documents he'd received from Edward Snowden had been corrupted, he needed to retrieve copies from fellow journalist Laura Poitras in Berlin. They decided the safest way to transfer the sizable cache was to use a USB drive carried by hand to Greenwald's home in Brazil. As a result, Greenwald’s partner David Miranda was detained at Heathrow, searched, and questioned for nine hours.
That's exactly the sort of ordeal Micah Lee, the staff technologist and resident crypto expert at Greenwald’s investigative news site The Intercept, hopes to render obsolete."Free App Lets the Next Snowden Send Big Files Securely and Anonymously
"It's a great new software solution to a thorny problem..."The Troubling Truth of Why It's Still So Hard to Share Files Directly
"Onionshare lets users share files securely and anonymously, without middlemen."Meet Onionshare, the File Sharing App the Next Snowden Will Use