Python virtual environments (VE )are saved in your home directory by default. However, in case you are running out of space in your home directory, you can save the VEs in different locations, such as your work directory where there is no disk quota.
The following command will create a VE in your work directory with name test-env:
conda create --prefix $WORKDIR/test-env python=3.9.1
To activate the VE, you need to specify the full path where your VE is saved.
conda activate $WORKDIR/test-env