conda-install
Install packages into an existing conda environment.
TLDR
Install a single package into the currently active conda environment
$ conda install [package]
Install a single package into the currently active conda environment using channel conda-forge
$ conda install -c conda-forge [package]
Install a single package into the currently active conda environment using channel conda-forge and ignoring other channels
$ conda install -c conda-forge --override-channels [package]
Install multiple packages
$ conda install [package1 package2 ...]
Install a specific version of a package
$ conda install [package]=[version]
Install a package into a specific environment
$ conda install --name [environment] [package]
Update a package in the current environment
$ conda install --upgrade [package]
Install a package and agree to the transactions without prompting
$ conda install --yes [package]