In linux, how can I check whether the video card driver is installed?

In linux, how can I check whether the video card driver is installed?

Check that there is a wooden driver in the pure ure field. If there is any content, the graphics card driver is installed.

Sudo lshw-c video

WARNING: you shoshould run this program as super-user.
^ CI (sysfs)
Chenghao @ chenghao-Lenovo-Product :~ $ Sudo lshw-c video
[Sudo] password for chenghao:
*-Display
Description: VGA compatible controller
Product: Wrestler [Radeon HD 6310]
Vendor: Advanced Micro Devices, Inc. [AMD/ATI]
Physical id: 1
Bus info: pci @ 0000:00:01. 0
Version: 00
Width: 32 bits
Clock: 33 MHz
Capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
Configuration: driver = fglrx_pci latency = 0

Resources: irq: 43 memory: c0000000-cfffffff ioport: f000 (size = 256) memory: feb00000-feb3ffff

Sudo gedit/etc/X11/xorg. conf

Section "ServerLayout"
Identifier "aticonfig Layout"
Screen 0 "aticonfig-Screen [0]-0" 0 0
EndSection

Section "Module"
EndSection

Section "Monitor"
Identifier "aticonfig-Monitor [0]-0"
Option "VendorName" "ATI Proprietary Driver"
Option "ModelName" "Generic Autodetecting Monitor"
Option "DPMS" "true"
EndSection

Section "Device"
Identifier "aticonfig-Device [0]-0"
Driver "fglrx"
BusID "PCI: 0: 1: 0"
EndSection

Section "Screen"
Identifier "aticonfig-Screen [0]-0"
Device "aticonfig-Device [0]-0"
Monitor "aticonfig-Monitor [0]-0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection

/Usr/src/fglrx-13.350.1/has an installation package
How to upgrade kernel 3.13 to 3.18.3a card driver?

Solution: Re-compile the kernel, directly go to init3, and install the graphics card driver and restart it.
How can I install it in the simplest way?