# Kernel ## Reconfigure the kernel ```bash $ emerge --ask --config sys-kernel/gentoo-kernel ``` # OpenRC ## Start a service ```bash $ rc-service <service name> start ``` # Portage ## Synchronize the ebuild repositories on the system ```bash $ sudo emerge --sync ``` ## Update all packages ```bash $ emerge -avuDN @world ``` ## Monitor the progress of emerging packages ```bash $ watch -cn 10 genlop -ci ``` ## Manage configuration file changes after emerging packages ```bash $ dispatch-conf ``` ## Remove unnecessary packages ```bash $ emerge -av --depclean --pretend ``` ## Deselect a package ```bash $ emerge --deselect <package> ```