Operating Systems

Basic Concepts

Processes, Process Table, Threads, Address Spaces, Files, I/O, Protection, Shell, Kernel, Booting, Terminal vs Console vs Shell, System Calls

Virtual Machines

Hypervisor, JVM

Processes and Threads

Process Creation, Process Termination, Process Hierarchy, Process States, User Space, Kernel Space, IPC, Scheduling

Memory Management

Address Spaces, Virtual Memory, Paging, Page Table, Segmentation

File Systems

File Structure, Records, File Types, File Naming, File Access, File Attributes, File Operations, Directory Hierarchy, Directory Operations, Absolute Paths, Relative Paths, File System Layout, MBR, Partitions, I-Nodes

I/O

Block vs Character Devices, Device Controllers, I/O Ports, Memory-Mapped I/O, DMA, Device Independence, Mounting, Buffering, Drivers

Terminal vs Console vs Shell

Linux Basics

Kernel, Process Management, Memory Management, Device Management, System Calls, Using Shell, stdin, stdout, stderr, Environment Variables, PATH, File Modes & Permissions, Linux Directory Hierarchy (root directories and their usage), Device Files (/dev/null)

Linux Basic Commands

ls, cp, mv, cat, touch, rm, echo, cd, mkdir, rmdir, Shell Globbing, grep, less, pwd, diff, file, find, locate, head, tail, sort, Shell Input & Output Redirection, ps, kill, Background Processes (&), chmod, chown, Symbolic Links, Archiving & Compressing (gzip, tar), sudo, sudoers

Linux Cron

Crontab

Linux Bash Scripting Basics

Comments, Quoting and Literals, Special Variables, Exit Codes, Conditionals, Loops, Command Substitution, Temporary Files, Subshells

Linux User Environments

Shell Startup Files, Aliases, Prompt