Linux startup process and related configuration files

The file systems used during linux startup and related configuration files are inconsistent between non-release versions of linux. as a result, some related configuration files involved in linux startup are also different, it is easy to cause confusion. Mainly reflected in the linux init process startup process: related to RedHat... the file systems used during linux startup and related configuration files are inconsistent between non-release versions of linux. as a result, some related configuration files involved in linux startup are also different, it is easy to cause confusion. It is mainly reflected in the linux init process startup process: the related configuration files under Red Hat are:/etc/inittab/etc/rc. d/rc. sysinit/etc/rc. d/rcX. d/the symbolic links in the directory/etc/rc. d/init. d/the actual daemon script/etc/rc in the directory. d/rc. the configuration file corresponding to the local user-defined startup script Ubuntu is:/etc/inittab (some do not seem to have this File)/etc/rcS. d/startup service symbolic link/etc/rcX. d/The Startup directory corresponding to each running level, X: 0-6/etc/init. d/actual service startup script/etc/rc. the local user-defined startup script mainly sorts out the association between configuration files in the Ubuntu system: the init process reads the inittab file and starts the rcS. all services under the d Directory, determine the startup running level (initdefault), and stop [K] Or start [S] corresponding to the running level rcX. d/service rcS in the directory. d/rcX. all files in the d directory are init. d. the symbolic link of the service script under the Directory. use the [K] identifier to indicate the stop and the [S] identifier to indicate the start. three files:/etc/init. d/rc/etc/init. d/rc. local/etc/init. the d/rcSrc script uses the first parameter to determine the specific service running directory/level, for example, rc S executes the rcS. d/services, rc 5 executes services under rc5.d. Rc. the local script runs or stops/etc/rc according to the identity. local script (if any). The default value is/etc/rc. there is no content in the local file, or there is an exit 0; you can add a custom startup program in it. Execute all services in the RFM. d/: exec/etc/init. d/rc S.