ENV(1)				 User Commands				ENV(1)

NAME
       env - run a program in a modified environment

SYNOPSIS
       env [OPTION]... [-] [NAME=VALUE]... [COMMAND [ARG]...]

DESCRIPTION
       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

       -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

SCRIPT OPTION HANDLING
       The -S option allows specifying multiple arguments in a script.
       Running a script named 1.pl containing the following first line:

	      #!/usr/bin/env -S perl -w -T
	      ...

       Will execute perl -w -T 1.pl

       Without the '-S' parameter the script will likely fail with:

	      /usr/bin/env: 'perl -w -T': No such file or directory

       See the full documentation for more details.

NOTES
       POSIX's exec(3p) pages says:
	      "many existing applications wrongly assume that they start with
	      certain signals set to the default action and/or unblocked....
	      Therefore, it is best not to block or ignore signals across
	      execs without explicit reason to do so, and especially not to
	      block signals across execs of arbitrary (not closely
	      cooperating) programs."

AUTHOR
       Written by Richard Mlynarik, David MacKenzie, and Assaf Gordon.

REPORTING BUGS
       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/>
       Report any translation bugs to <https://translationproject.org/team/>

COPYRIGHT
       Copyright © 2025 Free Software Foundation, Inc.	License GPLv3+: GNU
       GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.
       There is NO WARRANTY, to the extent permitted by law.

SEE ALSO
       sigaction(2), sigprocmask(2), signal(7)

       Full documentation <https://www.gnu.org/software/coreutils/env>
       or available locally via: info '(coreutils) env invocation'

GNU coreutils 9.8		September 2025				ENV(1)