Create a signed transaction offline

Ergonomic Bitcoin wallet and private key management.
More information: <https://electrum.org>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

electrum mktx {{recipient}} {{amount}} -f 0.0000001 -F {{from}} -o

click the source code to copy install electrum on any operating system with command-not-found.com