printenv − print all or part of environment
printenv [OPTION]... [VARIABLE]...
values of the specified environment VARIABLE(s). If no
VARIABLE is specified, print name and value pairs for them
end each output line with NUL, not newline
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.
© 2018 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.
or available locally via: info '(coreutils) printenv invocation'