Kerneparametre

Kerneparametre, or kernel parameters, are values passed to the operating system kernel at boot or during operation to influence its behavior. They are used to control hardware initialization, memory management, driver loading, and kernel features.

On Linux, kerneparametre are typically supplied through the boot loader, such as GRUB, by appending options to the kernel line. The currently active command line can be viewed in /proc/cmdline. Some parameters can also be set at runtime via the sysctl interface, writing to /proc/sys or using the sysctl command to adjust tunables.

Common kerneparametre include root= to select the root filesystem, quiet to reduce boot messages, nomodeset to disable kernel mode setting, mem= to limit memory, maxcpus= to restrict CPUs, and noapic, acpi=off, etc. These parameters affect early boot, device discovery, memory layout, power management, and performance.

Persistence and management: Boot-time parameters are stored in bootloader configuration (for example GRUB_CMDLINE_LINUX in /etc/default/grub) and require updating the bootloader to take effect. Runtime parameters can be persisted with sysctl configuration files in /etc/sysctl.conf or /etc/sysctl.d/. Misconfiguration can render a system unbootable or unstable.

See also kernel parameters, command line, Sysctl, initramfs.