1. https://stackoverflow.com/questions/7438681/how-to-duplicate-virtualenv
conda create --name myclone --clone myenv

https://docs.conda.io/projects/conda/en/latest/commands/create.html
conda create -n tf115 --clone /state/partition1/c23/sdd/anaconda3/envs/caoyao

2. https://datascience.stackexchange.com/questions/24093/how-to-clone-python-working-environment-on-another-machine

conda install -c conda-forge conda-pack

# Pack environment myenv into myclone.tgz 
conda pack -n myenv -o myclone.tgz

# Pack environment located at an explicit path into my_env.tar.gz
$ conda pack -p /explicit/path/to/my_env

# Unpack environment into directory `my_env`
$ cd ~/anaconda/envs
$ mkdir -p myclone
$ tar -xzf myclone.tgz -C myclone

# Optinal
# Use Python without activating or fixing the prefixes. Most Python
# libraries will work fine, but things that require prefix cleanups
# will fail.
$ ./myclone/bin/python

# Optional
# Activate the environment. This adds `myclone/bin` to your path
$ source myclone/bin/activate

# Optional
# Run Python from in the environment
(myclone) $ python

# Cleanup prefixes from in the active environment.
# Note that this command can also be run without activating the environment
# as long as some version of Python is already installed on the machine.
(myclone) $ conda-unpack


3. https://prasaz.medium.com/exporting-python-virtual-environments-7a135f47b2da

Generate the virtual environment using the wheel files
Prerequisites: Originating PC/Server and the destination pc/server both must have the same python versions.

Step 1 — Generate package list from the source environment
Generate file contains the list of packages in the current environment.

	pip freeze -l > packages.txt

Step 2 — Generate wheel files from the source environment.
Generate wheel files for all the installed packages in the source environment using the packages.txt

	pip wheel -w wheels_folder -r packages.txt

Step 3- Create the new virtual environment
Copy the folder contains the generated wheels files to the destination. Once done, create new virtual environment using the venv command and activate it.

Create requirements.txt file with all the wheel files.

then run pip install -r requirements.txt to get them all install at once

	pip install -r requirements.txt

Known issues
Failed building wheel for X while generating wheel files
In order to generate wheel files successfully wheel package is required. This is being used to regenerate the wheel files when the package is required to rebuild the wheel files due to some error.

	pip install wheel


4. https://stackoverflow.com/questions/41274007/anaconda-export-environment-file
The easiest way to save the packages from an environment to be installed in another computer is:

	conda list -e > req.txt
then you can install the environment using

	conda create -n <environment-name> --file req.txt