MANUAL.md: update `apt-key` example
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| @@ -188,13 +188,13 @@ transfers, and curl's `-v` option to see exactly what curl is sending. | |
| ## Piping | |
| - | Get a key file and add it with `apt-key` (when on a system that uses `apt` for |
| - | package management): |
| + | Get a key file and install it as a trusted one (when on a system that uses |
| + | `apt` for package management): |
| - | curl -L https://apt.example.org/llvm-snapshot.gpg.key | sudo apt-key add - |
| + | curl -L https://apt.example.org/llvm-snapshot.gpg.key | sudo tee |
| + | /etc/apt/trusted.gpg.d/llvm-snapshot.asc >/dev/null |
| - | The '|' pipes the output to STDIN. `-` tells `apt-key` that the key file |
| - | should be read from STDIN. |
| + | The '|' pipes the output to stdin. `tee` reads from stdin. |
| ## Ranges | |