/usr/bin/env

Set each NAME to VALUE in the environment and run COMMAND

Usage: env [OPTION]... [-] [NAME=VALUE]... [COMMAND [ARG]...]

Arguments:
  [vars]...

Options:
  -i, --ignore-environment      start with an empty environment
  -C, --chdir <DIR>             change working directory to DIR
  -0, --null                    end each output line with a 0 byte rather than a newline (only valid
                                when printing the environment)
  -f, --file <PATH>             read and set variables from a ".env"-style configuration file (prior
                                to any unset and/or set)
  -u, --unset <NAME>            remove variable from the environment
  -v, --debug...                print verbose information for each processing step
  -S, --split-string <S>        process and split S into separate arguments; used to pass multiple
                                arguments on shebang lines
  -a, --argv0 <a>               Override the zeroth argument passed to the command being executed.
                                Without this option a default value of `command` is used.
      --ignore-signal[=<SIG>]   set handling of SIG signal(s) to do nothing
      --default-signal[=<SIG>]  reset handling of SIG signal(s) to the default action
      --block-signal[=<SIG>]    block delivery of SIG signal(s) while running COMMAND
      --list-signal-handling    list signal handling changes requested by preceding options
  -h, --help                    Print help
  -V, --version                 Print version

A mere - implies -i. If no COMMAND, print the resulting environment.