I recently installed a 240 GB Kingston M.2 SSD and installed Ubuntu 16.04 on it. But after working on it for a while it randomly freezes for a very long time even the mouse didn't work then. What should I do in this situation?
hp@hp-HP-Laptop-15-bs1xx:~$ free -h
total used free shared buff/cache available
Mem: 7.7G 970M 5.4G 341M 1.4G 6.2G
Swap: 7.9G 0B 7.9G
hp@hp-HP-Laptop-15-bs1xx:~$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sdb2 during installation
UUID=10026a97-9791-4a55-944b-e9141b8e1393 / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/sda2 during installation
UUID=DA35-0453 /boot/efi vfat umask=0077 0 1
# swap was on /dev/sdb3 during installation
UUID=820342c5-9b51-4e0d-a1df-d01ff6016cbb none swap sw 0 0
hp@hp-HP-Laptop-15-bs1xx:~$
