性质
run
https://docs.flatpak.org/en/latest/flatpak-command-reference.html#flatpak-run
–env=K=V，需要使用 –env= 格式，不能省略等号。
enter
Enter a running sandbox.
https://man7.org/linux/man-pages/man1/flatpak-enter.1.html
提供远程仓库管理功能 Manage Remote Repository
remotes List all configured remotes
remote-add Add a new remote repository (by URL)
remote-modify Modify properties of a configured remote
remote-delete Delete a configured remote
remote-ls List contents of a configured remote
remote-info Show information about a remote app or runtime