Installation problem in erpnext

Install / Update Setup
1

Hi i am newbee to this ,i am trying to install erpnext on my system when i try to
bench get-app erpnext GitHub - frappe/erpnext: Free and Open Source Enterprise Resource Planning (ERP) on console it says on console that
OSError: [Errno 2] No such file or directory: ‘./apps’

2

You need to run bench from the frappe-bench folder

3

Thank you

4

I have the same error, and also by running bench from the frappe-bench folder I have still the error:
errread, errwrite)
File “/usr/lib64/python2.7/subprocess.py”, line 1335, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory: ‘./apps’
[frappe@NAS-01 frappe-bench]$ pwd
/home/frappe/frappe-bench

Thanks for your help