python - Anaconda on Ubuntu - Error in permission to update using conda command -

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on laptop on windows 8.1 have vmware , ubuntu 16.4 installed.

i installed anaconda 2.7 (x64) on it. directory anaconda installed, is:

 /home/anaconda2/

when tried use following command update packages, got errors mentioned below:

 conda update --all

error

 error: missing write permissions in: /home/anaconda2

i tried use sudo , tried writing following permission under visudo

madhu all=(all:all)

nothing worked....

can please me?

what this....

 sudo chown -r madhu /home/anaconda2/

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