printenv - print all or part of environment
printenv [OPTION]... [VARIABLE]...
Print the values of the specified environment VARIABLE(s). If no VARIABLE is specified, print name and value pairs for them all.
end each output line with 0 byte rather than newline
--help display this help and exit
output version information and exit
NOTE: your shell may have its own version of printenv, which usually supersedes the version described here. Please refer to your shell's documentation for details about the options it supports.
Written by David MacKenzie and Richard Mlynarik.
Report printenv bugs to email@example.com
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report printenv translation bugs to <http://translationproject.org/team/>
Copyright © 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://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.
The full documentation for printenv is maintained as a Texinfo manual. If the info and printenv programs are properly installed at your site, the command
info coreutils 'printenv invocation'
should give you access to the complete manual.