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6. 操作系统启动过程及运行级别\r\n\r\n 操作系统启动过程\r\n ================\r\n [1] prom (系统自检selftest) ,\r\n [2] bootblk, (系统引导盘启动扇区),\r\n [3] ufsboot (/platform/\'uname -i\'/ufsboot),\r\n [4] kernel (initself, /kernel/genunix, /etc/system),\r\n [5] init (/sbin/init, /etc/inittab, /sbin/rc*.d, \r\n /etc/rc*.d, /etc/init.d) \r\n\r\n\r\n\r\n 操作系统自动配置过程\r\n ====================\r\n [1] 内核上载入内存(kernel module are load to memory)\r\n o 静态内核static core:\r\n /kernel/genunix, /platform/.../kernel/unix, \r\n o 动态内核dynamically loaded module:\r\n driver module, streams, ufs module, nfs module \r\n /kernel/,/platform/.../kernel/unix, /usr/kernel\r\n o /etc/system内容: \r\n moddir, \r\n exclude rootdev, \r\n set pt_cnt=100\r\n ...............\r\n \r\n\r\n [2] 设备配置(device configration )\r\n o device tree: /devices, /dev \r\n o /etc/path_to_install \r\n\r\n\r\n 查看操作系统配置\r\n ==================\r\n # dmesg, \r\n # printconf, \r\n # sysdef \r\n # /usr/platform/sun4u/sbin/prtdiag\r\n # /usr/platform/sun43u/sbin/prtdiag\r\n\r\n 重新配置系统硬件\r\n =================\r\n # touch /reconfigure \r\n # init 0 \r\n ok boot -r (重新启动/配置系统硬件)\r\n ok boot -ar \r\n\r\n 在系统运行情况下,如果不想重新启动系统,\r\n 安装硬盘/磁带等热插拔硬件,则:\r\n # drvconfig \r\n # devlinks \r\n # disks \r\n # tapes \r\n 查看配置情况:\r\n # dmesg \r\n # printconf \r\n # sysdef \r\n\r\n\r\n 操作系统运行级别\r\n ==================\r\n 系统启动时,进入/etc/inittab中initdefault所定义的运行级别(deafult 3)\r\n 各运行级别的定义:\r\n run level:0, (halt, shotdown, stop+a,sync,go )\r\n 1, (single user, boot -s, init s )\r\n 2, (multiuser, unshare net)\r\n 3, (multiuser, deafult)\r\n 5, (halt, power off )\r\n 6, (reboot to level 3 )\r\n S (init 1, boot -s)\r\n\r\n 改变系统运行级别命令\r\n ====================\r\n # init 0, halt, shotdown, stop+a,sync,go \r\n # init 1, single user, boot -s, init s \r\n # init 2, multiuser, unshare net \r\n # init 3, multiuser, deafult \r\n # init 5, halt, power off \r\n # init 6, reboot to level 3 \r\n # init s, init 1, boot -s \r\n # init *,shotdown,halt,poweroff, reboot -- -r, reboot -- -s \r\n\r\n ok> boot -s, boot -sra \r\n\r\n 启动、关闭Solaris 操作系统\r\n ==========================\r\n ok> boot -r (一般在安装新设备如硬盘等后,重起机器,重建系统内核)。\r\n ok> boot cdrom - brower (从CDROM启动机器,重新安装系统,界面为浏览器方式)。\r\n\r\n # sync (将内存中的内容写入硬盘)。\r\n # halt (或 /etc/init 0) (关闭系统)。\r\n # reboot |
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