grep anchoring: The caret ‘^’ and the dollar sign ‘$’ are special characters that respectively match the empty string at the beginning and end of a line.
https://t.co/LcssrEPISo
ioctl vs. debugfs:
debugfs is used for ad-hoc interfaces for debugging functionality that does not need to be exposed as a stable interface to applications.
https://t.co/h76jjfxERI
A bogon is an illegitimate Internet Protocol address that falls into a set of IP addresses that have not been officially assigned to an entity by an internet registration institute, such as the IANA. The term bogon is a slang term and derives from the word bogus.
In routing tables, 0.0.0.0 can appear in the gateway column. This means the gateway to reach the corresponding destination subnet is unspecified. This generally means that no intermediate routing hops are necessary because the system is directly connected to the destination.
Big-endian coding was part of the original design of the ARPANET, the precursor to today’s Internet. In addition, in some older architectures, such as the IBM System/360, big-endian was the predominant format.
https://t.co/meYA72p0WW