手機 - F(x)tec Pro1 - Ubuntu - 解決FAILED (remote: 'Flashing is not allowed in Lock State')fastboot: error: Command failed}問題

問題如下：

Error: fastboot:flash: Error: Flashing failed: {"error":{"code":1},"stderr":"FAILED (remote: 'Flashing is not allowed in Lock State')fastboot: error: Command failed"}

解法：Unlock Bootloader

$ sudo fastboot flashing unlock