Manual: gnuenv

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 stderr

       -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
       GNU coreutils online help: 
       Report any translation bugs to 

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

       Full documentation 
       or available locally via: info '(coreutils) env invocation'

       Packaged by Ubuntu (9.7-3ubuntu2)
       Copyright © 2025 Free Software Foundation, Inc.
       License GPLv3+: GNU GPL version 3 or later .
       This is free software: you are free to change and redistribute it.
       There is NO WARRANTY, to the extent permitted by law.

GNU coreutils 9.7					January 2026						      ENV(1)