johnnny

5 ms·

1.
by johnnny 3y ago
t's a limitation imposed by the ping programme itself, it'll refuse to use very short intervals if you're not root. This is documented in the man page. Or, use the source, Luke: https://github.com/apple-oss-di
2.
by johnnny 3y ago
Try:: $ dpkg -S /bin/ping iputils-ping: /bin/ping $ grep 'downloaded from' /usr/share/doc/iputils-ping/copyright It was downloaded from https://github.com/iputi
3.
by johnnny 3y ago
They went rouge? As opposed to putting on mascara?
4.
by johnnny 3y ago
Using DHCP, the same tool that can configure any client computer with addresses and gateways, meaning you hopefully secure that already. Some switches give you tools to mark a few physical ports as "truster", allowing DHCP OFFER f
5.
by johnnny 3y ago
Where did you get the idea that anybody on the Internet can? The first step to network booting (PXE or UEFI boot) requires DHCP, which means a DHCP server or relay on your local broadcast domain (switched LAN, and I'm sure there are ex
6.
by johnnny 3y ago
I work in networking, not particularly close to the hardware. I have colleagues who manipulate IP addresses by looking at the string representation of the address, splitting on the `.`, casting each part back to an integer, etc. Their code
7.
by johnnny 4y ago
Databases too have indexes! Almost as if that makes it easier to search for both machines and humans!
8.
by johnnny 4y ago
TCP tries really hard to avoid fragmentation, by setting the DF flag and reducing the MSS when it sees a PTB error. Of course that sometimes fails, so if you still have TCP fragmented segments, the next best thing is to filter by source&#x2
9.
by johnnny 4y ago
Are they 100% wool? Wooly jumpers, especially when made of fragile merino wool, remain usable for much longer when they are made of a mix that includes plastic fibers (maybe 75% merino, 25% polyester).
10.
by johnnny 4y ago
If you allow infinitely long descriptions, then I don't know what's the score. In the case of "descriptions" that amount to (potentially infinite) decimal expansions, I think an argument akin to Cantor's diagonal wi
11.
by johnnny 4y ago
> But that set must have a member whose value is closest to zero This is not true for real numbers with the usual "less-than" relation. In fact, considering real numbers, no open subset of R admits a lower member. According to
12.
by johnnny 4y ago
The set of numbers that can be written with a finite number of 0-9 digits is countable. That set is called the decimal numbers, and is a subset of the rational numbers which itself is countable too.
13.
by johnnny 4y ago
As fro your further edit: assuming √2 is rational, then the set of ~~rational~~ integers {q: q√2 ∈ ℤ} does not admit a minimum, indeed it contains arbitrarily small numbers, so we can't pick k the smallest member of that set.
14.
by johnnny 4y ago
k * √2 is an integer, and k is an integer, by construction of K and the initial assumption that K is not empty. Therefore their difference k * √2 - k = k * (√2 - 1) is an integer.
15.
by johnnny 4y ago
I have heard of an anecdote that in some company, can't remember which, when meeting to take a decision, they would have people speak up in order of seniority, from the most junior to the most senior in the room. That way they could av
16.
by johnnny 4y ago
I'll repeat myself: it's very obvious in context that they meant the positive solution of xˆ2 = 2. My definition of the square root is as follows: the square root of a positive real number x is the positive number, noted √x, such
17.
by johnnny 4y ago
It's very obvious in context that they meant the positive solution of xˆ2 = 2. My definition of the square root is as follows: the square root of a positive real number x is the positive number, noted √x, such that (√x) ^ 2 = x. To mak