распечатать всю среду или ее часть (print all or part of environment)
Имя (Name)
printenv - print all or part of environment
Синопсис (Synopsis)
printenv [OPTION]... [VARIABLE]...
Описание (Description)
Print the values of the specified environment VARIABLE(s). If no
VARIABLE is specified, print name and value pairs for them all.
-0, --null
end each output line with NUL, not newline
--help display this help and exit
--version
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.
