Menai Ala Eddine - Aladdin's questions

Yesterday,I was configuring Java Path for installing Netbeans Apache,then I went to sleep.Today,when I'm trying to login with correct username and password ,the screen gets stuck to display login again. I tried all the answers:

Ubuntu gets stuck in a login loop

My Ubuntu gets stuck in a login loop due to the incompatibility with nvidia driver [duplicate]

The result of sudo cat .xsession-errors is :

Xsession: X session started for root at Sat Feb  9 16:49:52 CET 2019
dbus-update-activation-environment: systemd --user not found, ignoring --systemd argument
dbus-update-activation-environment: setting DISPLAY=:0
dbus-update-activation-environment: setting XAUTHORITY=/home/alaeddine/.Xauthority
localuser:root being added to access control list
dbus-update-activation-environment: systemd --user not found, ignoring --systemd argument
dbus-update-activation-environment: setting GTK_MODULES=gail:atk-bridge
dbus-update-activation-environment: systemd --user not found, ignoring --systemd argument
dbus-update-activation-environment: setting QT_ACCESSIBILITY=1
dbus-update-activation-environment: systemd --user not found, ignoring --systemd argument
dbus-update-activation-environment: setting SUDO_GID=1000
dbus-update-activation-environment: setting MAIL=/var/mail/root
dbus-update-activation-environment: setting USER=root
dbus-update-activation-environment: setting HOME=/home/alaeddine
dbus-update-activation-environment: setting QT4_IM_MODULE=xim
dbus-update-activation-environment: setting GTK_MODULES=gail:atk-bridge
dbus-update-activation-environment: setting DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-1YeMPItkMC,guid=70b8a7d6bd2d984b274e80eb5c5ef6a2
dbus-update-activation-environment: setting SUDO_UID=1000
dbus-update-activation-environment: setting IM_CONFIG_PHASE=1
dbus-update-activation-environment: setting LOGNAME=root
dbus-update-activation-environment: setting GTK_IM_MODULE=ibus
dbus-update-activation-environment: setting TERM=linux
dbus-update-activation-environment: setting USERNAME=root
dbus-update-activation-environment: setting WINDOWPATH=2
dbus-update-activation-environment: setting PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin
dbus-update-activation-environment: setting DISPLAY=:0
dbus-update-activation-environment: setting LANG=en_US.UTF-8
dbus-update-activation-environment: setting XAUTHORITY=/home/alaeddine/.Xauthority
dbus-update-activation-environment: setting XMODIFIERS=@im=ibus
dbus-update-activation-environment: setting SUDO_COMMAND=/usr/bin/startx
dbus-update-activation-environment: setting SHELL=/bin/bash
dbus-update-activation-environment: setting QT_ACCESSIBILITY=1
dbus-update-activation-environment: setting SUDO_USER=alaeddine
dbus-update-activation-environment: setting GPG_AGENT_INFO=/home/alaeddine/.gnupg/S.gpg-agent:0:1
dbus-update-activation-environment: setting QT_IM_MODULE=ibus
dbus-update-activation-environment: setting JAVA_HOME=/usr/lib/jvm/jdk-11.0.2
dbus-update-activation-environment: setting PWD=/home/alaeddine
dbus-update-activation-environment: setting XDG_DATA_DIRS=/usr/share/gnome:/usr/local/share/:/usr/share/
dbus-update-activation-environment: setting CLUTTER_IM_MODULE=xim

steeldriver said in this thread that the PATH is housed ,but I did not get what I do because it does not provide a full response.

I've installed Ubuntu 18.04.I have a headset and I'm trying to connect it to my laptop(hp),when I try switching bluetooth to "On" it displays:"No bluetooth found,plugin a dongle to use bluetooth",I tried to install Blue Managerand blueZ but it displays me :No adapters !,Any one knows the steps of bluetooth configuration ?

1-

I've tried lspci -nnk | grep -iA3 net;lsusb;dmesg | egrep -i 'blue|firm commands and the results are :

:~$ lspci -nnk | grep -iA3 net
07:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188EE Wireless Network Adapter [10ec:8179] (rev 01)
    Subsystem: Hewlett-Packard Company RTL8188EE mini-PCIe card [103c:197d]
    Kernel driver in use: rtl8188ee
    Kernel modules: rtl8188ee
08:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller [10ec:8136] (rev 07)
    Subsystem: Hewlett-Packard Company RTL810xE PCI Express Fast Ethernet controller [103c:1970]
    Kernel driver in use: r8169
    Kernel modules: r8169
:~$ 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 005: ID 19d2:1405 ZTE WCDMA Technologies MSM 
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 002: ID 04f2:b3a6 Chicony Electronics Co., Ltd 
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub


:~$ dmesg | egrep -i 'blue|firm
> 

Edit 1: After some googling ,I found that I need to buy a Bluetooth adapter to connect my PC to headphone,I bought one (Bluetooth Dongle (Cambridge Silicon Radio, Ltd)) and it plugged to my pc and my bluetooth is "On" but my laptop can not detect my device. After I plugged the bluetooth adpater and run lspci -knn | grep Net -A2; lsusb the result is :

07:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188EE Wireless Network Adapter [10ec:8179] (rev 01)
    Subsystem: Hewlett-Packard Company RTL8188EE mini-PCIe card [103c:197d]
    Kernel driver in use: rtl8188ee
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 014: ID 19d2:1405 ZTE WCDMA Technologies MSM 
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 002: ID 04f2:b3a6 Chicony Electronics Co., Ltd 
Bus 003 Device 006: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

When I run hcitool ,it does not detect the adapter (Bus 003 Device 003: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode),and the result is :

 hcitool dev
Devices: