env
Options
--ignore-environment,-i- 
env-help-ignore-environment
 --chdir=<DIR>,-C <DIR>- 
env-help-chdir
 --null,-0- 
env-help-null
 --file=<PATH>,-f <PATH>- 
env-help-file
 --unset=<NAME>,-u <NAME>- 
env-help-unset
 --debug,-v- 
env-help-debug
 --split-string=<S>,-S <S>- 
env-help-split-string
 --argv0=<a>,-a <a>- 
env-help-argv0
 --ignore-signal=<SIG>- 
env-help-ignore-signal
 
Examples
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|--ignore-environment]}} {{program}}
Remove variable from the environment and run a program:
env {{[-u|--unset]}} {{variable}} {{program}}
Set a variable and run a program:
env {{variable}}={{value}} {{program}}
Set one or more variables and run a program:
env {{variable1=value variable2=value variable3=value ...}} {{program}}
Run a program under a different name:
env {{[-a|--argv0]}} {{custom_name}} {{program}}
The examples are provided by the tldr-pages project under the CC BY 4.0 License.
Please note that, as uutils is a work in progress, some examples might fail.