ENV(1)

NAME
env - set and print environment

SYNOPSIS
env [-0i] [-u name] [name=value ...] [ utility [argument ...]]

DESCRIPTION
env executes utility after modifying the environment as specified on the command line. The option name=value specifies an environmental variable, name, with a value of value. The option ‘-i’ causes env to completely ignore the environment it inherits.

The option ‘-u name’ causes removal of the name environment variable if it is in the environment. This is similar to the unset command in sh(1). The value for name must not include the ‘=’ character.

If no utility is specified, env prints out the names and values of the variables in the environment. Each name=value pair is separated by a new line unless -0 is specified, in which case name/value pairs are separated by NUL. Both -0 and utility must not be specified together.

EXIT STATUS
env exits with one of the following values:

0   utility was invoked and completed successfully. In this case the exit code is returned by the utility itself, not env. If no utility was specified, then env completed successfully and returned the exit code itself.

1   An invalid command line option was passed to env.

1-125
    utility was invoked, but failed in some way; see its manual page for more information. In this case the exit code is returned by the utility itself, not env.

125 utility was specified together with the -0 option.

126 utility was found, but could not be invoked.

127 utility could not be found.

COMPATIBILITY
The historic - option has been deprecated but is still supported in this implementation.

The -u and -0 options are non-standard extensions.

SEE ALSO
execvp(3), environ(7)

STANDARDS
The env utility conforms to p1003.2-92.

HISTORY
The env command appeared in 4.4BSD.

The -u and -0 options first appeared in NetBSD 10.

BUGS
env doesn't handle commands with equal (“=”) signs in their names, for obvious reasons.