I am not able to use python3 in the console

[nanda2svec9732@cxln4 ~]$ source activate py36
-bash: activate: No such file or directory

Please use this:

export PATH=/usr/local/anaconda/bin:$PATH

No need to activate environment.

See this:

[sandeep@cxln4 ~]$ export PATH=/usr/local/anaconda/bin:$PATH
[sandeep@cxln4 ~]$ python
Python 3.6.8 |Anaconda, Inc.| (default, Dec 30 2018, 01:22:34)
[GCC 7.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>