\t\t\t\tGRUB Components and Configuration
\n 1st Stage
\n Small, added to MBR or boot sector during installation
\n Use \/sbin\/grub-install to repair
\n 2nd Stage
\n Loaded from filesystem containing \/boot
\n Configured in \/boot\/grub\/grub.conf
\n To boot Linux: title, kernel, root filesystem, and initial ramdisk<\/p>\n
Kernel Initialization init Initialization System Initialization Standalone Service Initialization Non-Service Startup GRUB Components and Configuration 1st Stage Small, added to MBR or boot sector during installation Use \/sbin\/grub-install to repair 2nd Stage Loaded from filesystem containing \/boot Configured in \/boot\/grub\/grub.conf To boot Linux: title, kernel, root filesystem, and initial ramdisk Kernel Initialization Kernel boot time functions Device detection Device driver initialization (modules loaded from initrd-.img) Mounts […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-230","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/kb.toderu.ro\/index.php?rest_route=\/wp\/v2\/posts\/230","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kb.toderu.ro\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kb.toderu.ro\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kb.toderu.ro\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kb.toderu.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=230"}],"version-history":[{"count":0,"href":"https:\/\/kb.toderu.ro\/index.php?rest_route=\/wp\/v2\/posts\/230\/revisions"}],"wp:attachment":[{"href":"https:\/\/kb.toderu.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=230"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kb.toderu.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=230"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kb.toderu.ro\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=230"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n Kernel boot time functions
\n Device detection
\n Device driver initialization (modules loaded from initrd-
\n Mounts root filesystem read only
\n Loads initial process (init, PID 1)
\n Logged to \/var\/log\/dmesg<\/p>\n
\n init reads its config: \/etc\/inittab
\n Initial runlevel
\n System initialization scripts
\n Runlevel specific script directories
\n Trap certain key sequences
\n Define UPS power fail \/ restore scripts
\n Spawn gettys on virtual consoles
\n Initialize X in runlevel 5<\/p>\n
\n \/etc\/rc.d\/rc.sysinit
\n Activate udev and selinux
\n Sets kernel parameters in \/etc\/sysctl.conf
\n Sets the system clock
\n Loads keymaps
\n Enables swap partitions
\n Sets hostname
\n Root filesystem check and remount read-write
\n Activate RAID and LVM devices
\n Enable disk quotas
\n Check and mount other local filesystems
\n Cleans up stale locks and PID files<\/p>\n
\n \/etc\/rc.d\/rc defines which standalone services to start
\n l5:5:wait:\/etc\/rc.d\/rc 5
\n Each runlevel has a corresponding directory:
\n \/etc\/rc.d\/rc5.d\/
\n K* symbolic links called with a stop argument
\n S* symbolic links called with a start argument
\n The System V init scripts reside in:
\n \/etc\/rc.d\/init.d\/
\n Behavior configured with files under \/etc\/sysconfig\/<\/p>\n
\n \/etc\/rc.d\/rc.local
\n Runs near the end of the runlevel specific scripts (S99local)
\n Common place for custom modification
\n Better practice:
\n Create a System V init script
\n Existing \/etc\/rc.d\/init.d\/ scripts can be used as a starting point
\n List all current settings: sysctl -a
\n Reprocess settings from sysctl.conf: sysctl -p
\n Set a \/proc value dynamically: sysctl -w net.ipv4.ip_forward=1<\/p>\n","protected":false},"excerpt":{"rendered":"