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4 October 2026
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N 19:47 | Operating Systems 2026F: Tutorial 4 4 changes history +14,467 [Soma (4×)] | |||
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19:47 (cur | prev) +72 Soma talk contribs (→Setup) | ||||
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19:07 (cur | prev) +411 Soma talk contribs (→File Permissions) | ||||
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19:04 (cur | prev) +431 Soma talk contribs (→Background) | ||||
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19:01 (cur | prev) +13,553 Soma talk contribs (Created page with "'''This tutorial is not yet finalized.''' In this tutorial you will learn about permissions, accounts, how logging in works, and ssh. ==Background== In UNIX and UNIX-like systems like Linux, kernel code runs in supervisor mode (ring 0 on x86-64) and user code runs in user mode (ring 3 on x86-64). When the CPU is in supervisor mode, all system resources can be accessed; when the CPU is in user mode, only a limited set of resources can be used, namely those that have be...") | |||
2 October 2026
| N 14:02 | Operating Systems 2026F Lecture 6 diffhist +3,067 Soma talk contribs (Created page with "==Video== Video from the lecture given on October 2, 2026 is now available: * [https://homeostasis.scs.carleton.ca/~soma/os-2026f/lectures/comp3000-2026f-lec06-20261002.mp4 Lecture 6] ==Notes== ===Lecture 6=== <pre> Lecture 6 --------- Signals What is a signal? - message from the kernel to a process - can originate from the kernel or from another process Idea: interrupt the process to handle an event - so a simple form of event handling, or more exception handl...") | ||||