New answers tagged

0 votes

Why not use "which"? What to use then?

(Since this question is tagged with "portability", various interpretations of the question are excluded, including "interactive use" and "I only care about the system I'm ...
user avatar
5 votes
Accepted

Which software emits dates in this format between dollar signs when exporting?

These are RCS keywords, also used by CVS and other version control software: $ echo '$Id$' >> foo $ ci foo foo,v <-- foo enter description, terminated with single '.' or end of file: NOTE: ...
user avatar
  • 31.7k
25 votes

Why does `dd` use `=` in its parameters?

POSIX mentions the following in its rationale section for dd: Certainly, many of the operands could have been designed to use the Utility Syntax Guidelines, which would have resulted in the classic ...
user avatar
2 votes

Why is `-W` reserved for vendor extensions?

v would normally be user for version or verbose, you cannot overload the switch. Bear in mind, this would be from a time when AT&T/BSD were the only versions out there and before ...
user avatar
  • 1,633
1 vote

Why was /dev/null called that?

'null' means 'nothing', 'without value', and so on. 'empty' implies a container. For emptiness to exist we need a container. In computer science in which zero is a value, we need a term for 'nothing'. ...
user avatar
2 votes

Did Unix have a package manager?

Early unix did not have a package manager, but some of the commercial distributions added package managers. All of them were proprietary and non-standard. For example, SunOS (aka Solaris), HPUX, and ...
user avatar
  • 3,283
5 votes
Accepted

Did Unix have a package manager?

No. The package manager requires a repository to be useful. Some storage space where packages wait to be installed. A repository requires network. Or some other kind of external storage. The earliest &...
user avatar
  • 1,777

Top 50 recent answers are included