Web server - Table A-10Administration CommandsCommandPurposepasswdChange a particular user s password. Any
Table A-10Administration CommandsCommandPurposepasswdChange a particular user s password. Any user can run this com- mand to change their own password. Only root can use it tochange someone else s. suSwitch to another user account without logging out of this one. Kernel module handlingYou may sometimes need to add kernel support for an additional device (soft- ware or hardware). If this need arises, you have a limited number of choices: You can either rebuild the kernel or install a loadable kernel module. Althoughrebuilding a kernel doesn t exactly require a Ph.D. in nuclear science, considerit a time-consuming nuisance that s best to avoid. The commands in Table A-11 enable you to include the kernel support you need while the system isrunning, without having to rebuild the entire thing from scratch: Table A-11Kernel Support CommandsCommandPurposedepmodRegenerates your module dependencies. insmodLoads a module by hand. lsmodLists the modules your kernel has loaded. modprobeLoads a module by hand along with its dependencies and settings. rmmodUnloads a module by hand. ProcessesMost of your system activity requires processes. Even when your systemappears idle, a dozen or so processes are running in the background. Thesecommands, shown in Table A-12, enable you to check under the hood tomake sure that everything that needs to be running is running and thatyou re not overheating or overtaxing resources: 402Part VI: Appendixes