How to run the program to find a hash

[Jiminy]

You're not supposed to post hashes unless authorized by the moderators.

Looks like it told you what the problem is.  No openCL drivers loaded.
You probably don't have the correct drivers for your gpu installed.
Besides, unless you have a super gpu rig, 11 characters might take you a while.

For my modest rig, it will take 12-1/2 days.

I found a problem which asked to find a string that its MD-5 hash is 68468614ed2e2a05c44a8824748a2742. It was said that the string has 11 letters from a to z. How can I find it using hashcat? I wrote that has to the file hash.txt. I downloaded the latest beta and tried to run it with

./hashcat64.bin hash.txt -O -w 3 -a 3 ?l?l?l?l?l?l?l?l?l?l?l

the output was


hashcat (v3.6.0-444-g9de1e557) starting...

Cannot find an OpenCL ICD loader library.

You are probably missing the native OpenCL runtime or driver for your platform.

* AMD GPUs on Linux require this runtime and/or driver:
  "AMDGPU-PRO Driver" (16.40 or later)
* Intel CPUs require this runtime and/or driver:
  "OpenCL Runtime for Intel Core and Intel Xeon Processors" (16.1.1 or later)
* Intel GPUs on Linux require this runtime and/or driver:
  "OpenCL 2.0 GPU Driver Package for Linux" (2.0 or later)
* NVIDIA GPUs require this runtime and/or driver:
  "NVIDIA Driver" (367.x or later)

Started: Mon Aug 28 14:03:20 2017
Stopped: Mon Aug 28 14:03:20 2017

Here is some information on my GPU:

lspci -v |less outputs

00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])
        Subsystem: Acer Incorporated [ALI] Haswell-ULT Integrated Graphics Controller
        Flags: bus master, fast devsel, latency 0, IRQ 44
        Memory at b0000000 (64-bit, non-prefetchable) [size=4M]
        Memory at a0000000 (64-bit, prefetchable) [size=256M]
        I/O ports at 3000 [size=64]
        [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
        Capabilities: <access denied>
        Kernel driver in use: i915
        Kernel modules: i915