/usr/bin/env

Usage: /usr/bin/env [OPTION]... [-] [NAME=VALUE]... [COMMAND [ARG]...]
Set each NAME to VALUE in the environment and run COMMAND.

Mandatory arguments to long options are mandatory for short options too.
  -a, --argv0=ARG
         pass ARG as the zeroth argument of COMMAND
  -i, --ignore-environment
         start with an empty environment
      --env0-from=FILE
         read NUL-delimited environment entries from FILE
  -0, --null
         end each output line with NUL, not newline
  -u, --unset=NAME
         remove variable from the environment
  -C, --chdir=DIR
         change working directory to DIR
  -S, --split-string=S
         process and split S into separate arguments;
         used to pass multiple arguments on shebang lines
      --block-signal[=SIG]
         block delivery of SIG signal(s) to COMMAND
      --default-signal[=SIG]
         reset handling of SIG signal(s) to the default
      --ignore-signal[=SIG]
         set handling of SIG signal(s) to do nothing
      --list-signal-handling
         list non default signal handling to standard error
  -v, --debug
         print verbose information for each processing step
      --help
         display this help and exit
      --version
         output version information and exit

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

SIG may be a signal name like 'PIPE', or a signal number like '13'.
Without SIG, all known signals are included.  Multiple signals can be
comma-separated.  An empty SIG argument is a no-op.

Exit status:
  125  if the env command itself fails
  126  if COMMAND is found but cannot be invoked
  127  if COMMAND cannot be found
  -    the exit status of COMMAND otherwise

Report bugs to: <bug-coreutils@gnu.org>.
GNU coreutils home page: <https://www.gnu.org/software/coreutils/>
General help using GNU software: <https://www.gnu.org/gethelp/>
Full documentation <https://www.gnu.org/software/coreutils/env>
or available locally via: info '(coreutils) env invocation'