Update of Erpnext 8

Great Friends,
i have successfully installed erpnext 8 in my local machine and i have explored it.I have read about update and tried to update with command bench update but to no avail.Kindly help.
This is the error trace
INFO:bench.utils:updating bench
INFO:bench.utils:git pull
Updating 2f03e9f…3a93dfa
error: Your local changes to the following files would be overwritten by merge:
.travis.yml
bench/config/common_site_config.py
bench/config/templates/nginx.conf
playbooks/develop/includes/setup_bench.yml
playbooks/develop/includes/setup_dev_env.yml
playbooks/develop/includes/wkhtmltopdf.yml
vm/ansible/roles/wkhtmltopdf/tasks/main.yml
vm/ansible/vm.yml
Please, commit your changes or stash them before you can merge.
Aborting
Traceback (most recent call last):
File “/usr/local/bin/bench”, line 11, in
load_entry_point(‘bench’, ‘console_scripts’, ‘bench’)()
File “/home/frappe/.bench/bench/cli.py”, line 40, in cli
bench_command()
File “/usr/local/lib/python2.7/dist-packages/click/core.py”, line 722, in call
return self.main(*args, **kwargs)
File “/usr/local/lib/python2.7/dist-packages/click/core.py”, line 697, in main
rv = self.invoke(ctx)
File “/usr/local/lib/python2.7/dist-packages/click/core.py”, line 1066, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File “/usr/local/lib/python2.7/dist-packages/click/core.py”, line 895, in invoke
return ctx.invoke(self.callback, **ctx.params)
File “/usr/local/lib/python2.7/dist-packages/click/core.py”, line 535, in invoke
return callback(*args, **kwargs)
File “/home/frappe/.bench/bench/commands/update.py”, line 35, in update
update_bench()
File “/home/frappe/.bench/bench/utils.py”, line 229, in update_bench
exec_cmd(“git pull”, cwd=cwd)
File “/home/frappe/.bench/bench/utils.py”, line 130, in exec_cmd
raise CommandFailedError(cmd)
bench.utils.CommandFailedError: git pull

@Fred1,

It seems that you have some local changes in bench directory please stash the changes using git stash and try bench update

@makarand_b Thanks.This is the response i got when i typed git stash into the bench folder:
fatal: Not a git repository (or any of the parent directories): .git.
Kindly help if i am doing something wrong

For all who have similar problem in updating and know nothing about stashing or committing kindly follow this link that gave me much knowledge about updating :Commit vs. Stash
Thanks
Fred