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Developers began to abandon MINIX after free and open-source Unix-like operating systems such as Linux and 386BSD became available in the early 1990s.
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printenv(1) [freebsd man page]

PRINTENV(1)						    BSD General Commands Manual 					       PRINTENV(1)

NAME
printenv -- print out the environment SYNOPSIS
printenv [name] DESCRIPTION
The printenv utility prints out the names and values of the variables in the environment, with one name/value pair per line. If name is specified, only its value is printed. Some shells may provide a builtin printenv command which is similar or identical to this utility. Consult the builtin(1) manual page. EXIT STATUS
The printenv utility exits 0 on success, and >0 if an error occurs. SEE ALSO
csh(1), env(1), sh(1), environ(7) STANDARDS
The printenv utility is provided for compatibility with earlier BSD and FreeBSD releases and is not specified by any standards. The func- tionality of printenv can be duplicated with the echo(1) and env(1) utilities. HISTORY
The printenv command appeared in 3.0BSD. BSD
May 12, 2003 BSD

Check Out this Related Man Page

printenv(1B)					     SunOS/BSD Compatibility Package Commands					      printenv(1B)

NAME
printenv - display environment variables currently set SYNOPSIS
/usr/ucb/printenv [variable] DESCRIPTION
printenv prints out the values of the variables in the environment. If a variable is specified, only its value is printed. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), echo(1), sh(1), stty(1), tset(1B), attributes(5), environ(5) DIAGNOSTICS
If a variable is specified and it is not defined in the environment, printenv returns an exit status of 1. SunOS 5.11 14 Sep 1992 printenv(1B)

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