Flashcards: Linux Kernel Management and Security — 16 cards

Linux Kernel — core component?

Manages hardware, resources, services.

Kernel Version — identification?

Specific release with features and fixes.

Kernel Architecture — design types?

Monolithic, microkernel, hybrid.

Kernel Responsibilities — tasks?

Process, memory, device, security.

Kernel Space vs User Space — difference?

Kernel: high privileges; User: limited privileges.

Kernel Module — definition?

Code loaded to extend kernel functionality.

Kernel Module Structure — includes?

Init, cleanup functions, metadata.

Kernel Module Programming — requires?

Kernel APIs, resource management.

Managing Kernel Modules — commands?

Load: modprobe, insmod; unload: rmmod.

modprobe — role?

Resolves dependencies, loads modules.

modinfo — purpose?

Displays module details.

Kernel Tuning — process?

Adjusting parameters for performance/security.

sysctl — utility?

Modifies kernel parameters at runtime.

Persistent Kernel Settings — method?

Edit /etc/sysctl.conf or /etc/sysctl.d/.

Kernel Security Risks — include?

Vulnerabilities, malicious modules, exploits.

Loading malicious modules — risk?

System compromise, privilege escalation.