$ conda cheat sheet

Conda basics
Verify conda is installed, check version number	conda info
Update conda to the current version	conda update conda
Install a package included in Anaconda	conda install PACKAGENAME
Run a package after install, example Spyder*	spyder
Update any installed program	conda update PACKAGENAME
Command line help	COMMANDNAME --help conda install --help

Using environments
Create a new environment named py35, install Python 3.5	conda create --name py39 python=3.9
Activate the new environment to use it	WINDOWS: activate py39 LINUX, macOS: source activate py39
Get a list of all my environments, active environment is shown with *	conda env list
Make exact copy of an environment	conda create --clone py39 --name py39-2
List all packages and versions installed in active environment	conda list
List the history of each change to the current environment	conda list --revisions
Restore environment to a previous revision	conda install --revision 2
Save environment to a text file	conda list --explicit > ros.txt
Delete an environment and everything in it	conda env remove --name ros
Deactivate the current environment	WINDOWS: deactivate macOS, LINUX: source deactivate
Create environment from a text file	conda create --name <env> --file ros.txt