???????????????initramfs
????initramfs ???? kernel 2.5????????????????????????????????????懈??????cpio???????cpio???邪????????小???????????????????????????? cpio??????????????邪??????????????rootfs?校?????械??????????????????????????校????????????????小?????????????????????????????????????????????????????????????????
???????????????????2.6.32-71.el6.i686?姹�?????????/boot????????????????/boot/initramfs-2.6.32-71.el6.i686.img????????????????????????????????????2.6????????????????initrd???????2.4?????????????image-initrd???????cpio???????????????????????initramfs-2.6.32-71.el6.i686.img?????????些??????

??????tmp??????薪??initrd.img????????

???????initrd.img???????????“initrd.img:ISO 9660 CD-ROM filesystem data”????????????????“mount -o loop initrd.img /mnt/test”???泄????
??????????????????????????????????????????????
????grub??stage2??initrd???????????煤????械??????????????校?????????initrd?械?init???????????????????????init???????????????????init????????????????????????????娲�?????????璞�???????????????????????????????????????璞�????????????rootfs????????????????????????????未??????妫�??????????????????????????????/sbin/init???????????1???????????????????????/sbin/init???????
??????????????
?????????????????妫�??????????????????????????????????????????????/sbin/init???????????????薪???????????????????????????????????????????/etc/inittab?????????????????????????????????眉???????澹�?????椋�????????????????????1?????
????1. ?????????????(/etc/rc.d/rc.sysinit)?????????谢?????????????写????????????????????????????????????????????????????????????????屑??????????????????????rc.sysinit??????????(?????Linux???邪妫�???????????些????)???锟�?
??????1????????绻�???????????????????????绻�?????????”/etc/sysconfig/network”??????????????????????????绻�????
??????2????????????????璞�/proc??usb?璞�/sys??????/proc??????????????????usb?璞�????????????usb??????????????usb???????
??????3????????????SELinux??
??????4??????璞�???????寮�???pnp????????????
??????5???????????????????????????”/etc/sysconfig/modules/*.modules”????????????椋�????????????小?
??????6????????????????谩???”/etc/sysctl.conf”????????????????霉????
??????7???????????clock????
??????8???????????????????巍?
??????9??????raid??LVM?????????
??????10??????????????????????
??????11?????写??????quota???????
??????12???????????????????????
??????13?????quota?????
??????14?????????????璞�??????????????????
??????15?????????????械?????????
??????16???????????????”/var/log/dmesg”????小?
??????/etc/rc.d/rc.sysinit?????????????????????????????????????????????????????????????????????????????????????????????????
????2. ???/etc/rc.d/rc???????????????????????????????K??S???????????????屑??????????????/etc/rc.d/rc*.d??*=0~6?????锟�????械???????????/etc/init.d??????????????????rc.sysinit???????/etc/inittab???????????????????????????/etc/rc.d/rc*.d?渭??????
????/etc/init.d-> /etc/rc.d/init.d
????/etc/rc ->/etc/rc.d/rc
????/etc/rc*.d ->/etc/rc.d/rc*.d
????/etc/rc.local-> /etc/rc.d/rc.local
????/etc/rc.sysinit-> /etc/rc.d/rc.sysinit
??????????/etc???渭?init.d??rc??rc*.d??rc.local??rc.sysinit???????/etc/rc.d????????????????械??????????????????????3???????????????
????/etc/rc.d/rc3.d?????????渭?????????????? S ?? K ?????????????????????”/etc/rc.d/init.d”???渭????shell?????S??????????????start??????????K??????????????????????/etc/rc.d/rc*.d?械????????????????????????????????屑????械??????懈?????????????chkconfig???????????????????setup??ntsys??system-config-services?????卸?????????????????????????????????????init.d????????????shell??????????rc*.d???薪??????????????shell???????些shell????????????????????S??K??????????????????????小?????????小????纾�/etc/rc.d/rc3.d /S01sysstat??/etc/rc.d/rc3.d /S99local????小?