$ adb devices
List of devices attached
07c15663    device

$ adb reboot bootloader

$ sudo ./fastboot devices
[empty response]

$ lsusb
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 006: ID 5986:0266 Acer, Inc
Bus 001 Device 005: ID 0a5c:21e6 Broadcom Corp. BCM20702 Bluetooth 4.0 [ThinkPad]
Bus 001 Device 004: ID 147e:2020 Upek TouchChip Fingerprint Coprocessor (WBF     advanced mode)
Bus 001 Device 035: ID 045e:0745 Microsoft Corp. Nano Transceiver v1.0 for     Bluetooth
Bus 001 Device 034: ID 046d:c049 Logitech, Inc. G5 Laser Mouse
Bus 001 Device 032: ID 1a40:0101 Terminus Technology Inc. 4-Port HUB
Bus 001 Device 031: ID 1a40:0101 Terminus Technology Inc. 4-Port HUB
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 030: ID 0bdb:1926 Ericsson Business Mobile Networks BV
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

$ lsusb
[...]
Bus 001 Device 060: ID 18d1:4ee2 Google Inc. Nexus 4 (debug)
[...]