![]() ![]() URNs are different from URLs in this rigid uniqueness constraint, even though they both share the syntax of URIs. And even if that wasn't the case, the possibility of naming my descendants after me make this unsuitable as a URN. However, even if no other family used this name, I'm named after my paternal grandfather, so it still wouldn't be unique across time. The old and new versions are called V1 and V2 respectively. My name, Roger Pate, could be like a URN (Uniform Resource Name), except those are much more regulated and intended to be unique across both space and time.īecause I currently share this name with other people, it's not globally unique and would not be appropriate as a URN. The Linux Crash Course is a tutorial series that goes over all of the core concepts regarding Linux that you'll need to know, one video at a. Christopher Brooks Asks: Converting wget stdout and stderr to CSV for analysis I am using wget to do some integrity checking of a set of websites as they are undergoing a considerable upgrade which involves migrating databases etc. īecause of this common confusion, many products and documentation incorrectly use one term instead of the other, assign their own distinction, or use them synonymously. In popular usage and in many technical documents and verbal discussions it is often incorrectly used as a synonym for URI. For example, in bash: wget -q -S -O - 2>&1 grep. The -o /dev/null is only necessary if you truly dont care about errors, since without that errors will be written to stderr (while the file is written to stdout). In computing, a Uniform Resource Locator (URL) is a subset of the Uniform Resource Identifier (URI) that specifies where an identified resource is available and the mechanism for retrieving it. You can try redirecting the standard error to the standard output as a possible solution. man wget: -O file -output-documentfile The documents will not be written to the appropriate files, but all will be concatenated together and written to file. I say "like" because these examples do not follow the required syntax. In this case it uniquely identifies me, but that would change if I get a roommate. It is like both a URL and URI (since all URLs are URIs), and also identifies me indirectly as "resident of.". This is a locator, which is an identifier for that physical location. stdin stdout - file - opt -help -version wget options URL The wget command. In this case it also happens to identify at least 5 other people in the USA alone. Usefuloptions -dump Printthe rendered pageto standard output and exit. It is like a URI, but cannot be a URL, as it tells you nothing about my location or how to contact me. And if you need stderr on stdout for some reason. ![]() This can be done using the -o (lower-case) command line. When used with -s it makes curl show error message if it fails. URIs identify and URLs locate however, locators are also identifiers, so every URL is also a URI, but there are URIs which are not URLs. If you want, you can also redirect the messages/information wget produces on stdout to a log file.
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