$ curl cheat.sh/
 cheat:env 
---
syntax: bash
---
# To list the exported variables of the current environment along with their values:
env

# To set an environment variable and run a command:
env <variable>=<value> <command>

# To set multiple environment variables and run a command:
env <variable_1>=<value> <variable_2>=<value> <command>

# To remove an environment variable and run a command:
env -u <variable> <command>

# To clear the environment and run a command:
env -i <command>

 tldr:env 
# env
# Show the environment or run a program in a modified environment.
# More information: <https://www.gnu.org/software/coreutils/env>.

# Show the environment:
env

# Run a program. Often used in scripts after the shebang (#!) for looking up the path to the program:
env program

# Clear the environment and run a program:
env -i program

# Remove variable from the environment and run a program:
env -u variable program

# Set a variable and run a program:
env variable=value program

# Set multiple variables and run a program:
env variable1=value variable2=value variable3=value program

$
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