ssh llave rsa

Se genera un par de llaves la llave se se copia al servidor es la llave publica.

1. Generar la llave 
ssh-keygen

2. buscando la llave 
cd .ssh/
Existen dos archivos nombre_maquina_id_rsa e nombre_maquina_id_rsa.pub.

3. Transferir al servidor de destino la llave publica, es decir, nombre_maquina_id_rsa.pub.

scp -P ## nombre_maquina_id_rsa.pub  usuario_servidor@direccion_servidor.com:/tmp

4. Conectamos al servidor vía SSH
ssh usuario_servidor@direccion_servidor.com
cd .ssh/

5. Agrega la clave pública al listado autorización
cat /tmp/id_rsa.pub >> authorized-keys

6. Borrar el archivo de clave pública ubicado en /tmp
rm /tmp/id_rsa.pub

How to enable on Linux Bluetooth

1. We must know the hardware we have

$:hwinfo --short
bluetooth:
                       Qualcomm Atheros Bluetooth Device

2. We must know the driver has been loaded.

osx:/home/xfib # lsusb -t
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/12p, 480M
    |__ Port 1: Dev 6, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
    |__ Port 6: Dev 2, If 0, Class=Vendor Specific Class, Driver=, 12M
    |__ Port 7: Dev 3, If 0, Class=Vendor Specific Class, Driver=rtsx_usb, 480M
    |__ Port 8: Dev 4, If 0, Class=Wireless, Driver=btusb, 12M
    |__ Port 8: Dev 4, If 1, Class=Wireless, Driver=btusb, 12M
    |__ Port 9: Dev 5, If 0, Class=Video, Driver=uvcvideo, 480M
    |__ Port 9: Dev 5, If 1, Class=Video, Driver=uvcvideo, 480M

3. We now list wireless status

osx:/home/xfib # /usr/sbin/rfkill list all
0: ideapad_wlan: Wireless LAN
        Soft blocked: no
        Hard blocked: no
1: ideapad_bluetooth: Bluetooth
        Soft blocked: yes
        Hard blocked: no
2: hci0: Bluetooth
        Soft blocked: yes
        Hard blocked: no
3: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no

4. In this case only have soft blocket, then now we try unblock soft device.

 osx:/home/xfib # /usr/sbin/rfkill unblock all

5. We list again to confirm the block is off

osx:/home/xfib # /usr/sbin/rfkill list all
0: ideapad_wlan: Wireless LAN
        Soft blocked: no
        Hard blocked: no
1: ideapad_bluetooth: Bluetooth
        Soft blocked: no
        Hard blocked: no
2: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
3: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no