Linux uses the “Change on Write” (COW) approach to reduce unnecessary duplication of memory objects.
Pehea ʻoe ʻo Cowsay?
ʻO nā moku Cowsay me nā ʻokoʻa liʻiliʻi, i kapa ʻia nā faila pipi, hiki ke loaʻa ma /usr/share/cowsay. No ka ʻike ʻana i nā koho faila pipi i loaʻa ma kāu ʻōnaehana, e hoʻohana i ka hae -l ma hope o ka cowsay. A laila, e hoʻohana i ka hae -f e hoʻāʻo i kekahi. $ cowsay -f dragon "Holo no ka uhi, manaʻo wau e hele mai ana kahi kihe."
ʻO wai ka inoa ʻo Cowsay?
He polokalamu ʻo cowsay e hoʻopuka i nā kiʻi ASCII o kahi bipi me kahi leka. Hiki iā ia ke hana i nā kiʻi me nā kiʻi i hana mua ʻia o nā holoholona ʻē aʻe, e like me Tux the Penguin, ka mascot Linux.
What are kernel exploits?
Typically, a kernel exploit involves making a syscall (an interface that allows userspace processes to communicate with the kernel) with arguments designed specially to cause unintended behavior, despite the syscall attempting to only allow valid arguments.
What is a zero day threat?
A zero-day threat (also sometimes called a zero-hour threat) is one that hasn’t been seen before and doesn’t match any known malware signatures.
What is the difference between user space and kernel space?
Hoʻopaʻa paʻa ʻia ka wahi Kernel no ka holo ʻana i kahi kernel ʻōnaehana hana pono, nā hoʻonui kernel, a me ka hapa nui o nā mea hoʻokele. ʻO ka ʻokoʻa, ʻo ka wahi hoʻohana ka wahi hoʻomanaʻo kahi e hoʻokō ai nā polokalamu noi a me kekahi mau mea hoʻokele.
What is a zero hour attack?
“A zero-day (or zero-hour or day zero) attack or threat is an attack that exploits a previously unknown vulnerability in a computer application, one that developers have not had time to address and patch. There are zero days between the time the vulnerability is discovered (and made public), and the first attack.”
Why is it called Zero-Day?
The term “zero-day” refers to the number of days that the software vendor has known about the hole. The term apparently originated in the days of digital bulletin boards, or BBSs, when it referred to the number of days since a new software program had been released to the public.
What does 0day mean?
A zero-day (0day) exploit is a cyber attack targeting a software vulnerability which is unknown to the software vendor or to antivirus vendors. The attacker spots the software vulnerability before any parties interested in mitigating it, quickly creates an exploit, and uses it for an attack.