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sun Technical Training NOTE

2013-11-15 11:42:01  來源: JSP教程 

  drwxrxrx root bin Apr : apache
  rwxrr root sys Apr : asppp cf
  
  第一位-指正式的文件
  c 指字符設備每個磁盤的塊大小為個字節
  b 指塊設備每個塊設備的塊的大小隨著分區的大小變化但是UFS文件系統的每個塊是k
  
  Logical Disk Device Names
  
  /dev/[ r] dsk/ c# t# d# s#
  c#控制器號
  t#通道號
  d#驅動器號
  s#分片號見下面的描述
   Partition or (slice number) Valid numbersare
  Tag = UNASSIGNED = USR Describes the file system
  = BOOT = BACKUP mounted on this partition
  = ROOT = VAR
  = SWAP = HOME
  
  /etc/path_ to_ inst記錄著啟動時每個設備的實例名物理名
  只在啟動時讀一下並被內核管理
  prtconf
  顯示系統配置
  系統文件的層次及含義
  
  / The root of the overall file system name space
  /bin The directory location for standard system commands or binary files
  /dev The primary location for logical device names
  /devices The primary location for physical device names
  /etc Host specific system administrative configuration files and databases
  /export The default directory for commonly shared file systems
  /home The default directory or mount point for users home directories
  /kernel The directory of platform independent loadable kernel modules
  required as part of the boot process
  /opt The default directory or mount point for addon application packages
  /platform The directory of platform dependent loadable kernel modules
  /sbin Essential executables used in the booting process and in manual system
  failure recovery
  /tmp Temporary files; cleared during the boot sequence
  /usr The directory for programs scripts and libraries used by all system users
  /var The directory for varying files which usually includes temporary logging
  or status files
  /mnt A convenient temporary mount point for file systems
  
  幾種文件系統的含義及歷史
  UFS
   UNIX file system based on the BSD Fast File system is the default diskbased file
  system for the Solaris operating environment
  
  ?HSFS
   High Sierra Rock Ridge and ISO file system Solaris HSFS is used on CDROMs
  and provide all UFS file system features and file types
  
  ?PCFS
   PC file system which allows read/ write access to data and programs on DOSformatted
  disks written for DOSbased personalcomputers
  
  ?UDF
   The UDF file system the industrystandard format for storing information on the optical
  media technology called DVD (Digital Versatile Disc or Digital Video Disc)
  
  
  NetworkBased File Systems
  ?Networkbased file systems can be accessed over the network NFS is
  the only available networkbased or distributed computing file system
  
   Virtual File Systems
  ?Virtual file systems are memorybased file systems that provide access
  to special kernel information and facilities
   The Cache File System
  
  ?The Cache File System (CacheFS) can be used to improve performance
  of remote file systems or slow devices such as CDROM drives When a
  file system is cached the data read from the remote file system or CD
  ROM is stored in a cache on the local system
  
   The Temporary File System
  ?The Temporary File System (TMPFS) uses local memory for file system
  reads and writes which is typically much faster than a UFS file system
  ?TMPFS use the swap space on a disk
  
  The Process File System
  ?The Process File System (PROCFS) resides in memory It contains a list
  of active processes by process number in the /proc directory
  
   The Loopback File System
  ?The Loopback File System (LOFS) lets you create a new virtual file
  system so you can access files by using an alternative path name
  
  磁盤基本概念
  Lable( VTOC)
  ?Volume Table of Content No disk sector( B)
  
   Boot block
  ?Stores the procedures used in booting the system
  ?The boot block is left blank if a file system not to be used for booting
  ?In the next disk sectors
  
   Superblock
  ?Detailed information ablout the file system
  ?Size and status of file system
  ?Date and time of the last update
  ?Cylinder group size
  ?Number of date blocks in cylinder group
  ?Path name and last mount point
  ?In the next disk sectors
  
  Inode
  ?All information about a file except its name which is kept in a directory
  ?An inode is byte
   Type of the file ( File/ Directory/ Block special/ Character special/ Symbolic link/ pipe/ Socket)
   The mode of the file( readwriteexecute permissions)
  
  
  
  讀磁盤的 VTOC 信息
  
  # prtvtoc /dev/ rdsk/ ctds
  
  PROM的概念
   PROM
  ?Each Sun system has a boot PROM chip This KB chip is typically located
  on the same board as the CPU
  ?The main functions of the boot PROM are to test the system hardware and
  boot the operating system
   Number of hard link
   User ID and group ID
   Number of bytes of the file
   An array of data block address
   The date and time of the file
  
   Data block
  ?The rest of the space allocated to the file system
  ?By default KB block size KB fragment size
  
  NVRAM的概念
  
  ?The NVRAM is KB of nonvolatile random access memory This is a
  pluggable chip that is often located on the main system board
  ?The NVRAM stores the Ethernet address host ID and the TOD clock A
  single lithium battery within the NVRAM module provides battery backup
  for the NVRAM and clock
  ?The NVRAM module also contains the EEPROM for the parameters that
  have been changed or customized from the boot PROMdefault parameters
  settings
  ?The userinterface commands and device aliases are stored in the NVRAM
  
  sun 機器的啟動過程
  Prom>Run Post>Prom Load bootblk>Bootblk Load ufsBoot>ufsboot loads / bit kernel
  >Kernel initializes Load modules start init process >start run rc scripts
  
   bit kernel
  /platform/ uname m/ kernel/ genunix
  /platform/ uname m/ kernel/ unix
  
   bit kernel
  /platform/ uname m/ kernel/ sparcv/ genunix
  /platform/ uname m/ kernel/ sparcv/ unix
  
  Module directories
  /kernel
  /usr/ kernel
  /platform/ uname m/ kernel
  /platform/ uname i/ kernel
  
  sun 的運行級別
  Level Powerdown state
  Level S or s Singleuser state 單用戶狀態掛上所有的文件系統
  Level Administrative state 管理員狀態
  Level Multiuser state 多用戶狀態運行大部分服務不運行NFS服務
  Level Multiuser state with NFS resources shared 多用戶狀態運行全部服務
  Level Alternative multiuser state 通常不支持
  Level Powerdown state
  Level Reboot state
  
  看當前的運行級別
  who r
  
  The /etc/inittab 記錄了啟動的級別
  內容格式
  id: rstate: action: process
  s: : wait:/ sbin/ rc >/ dev/ msglog <> /dev/ msglog   | |
  |___________|__ Run levels to which this entry applies
  |
  |______運行腳本
  
  啟動運行腳本
  所有的運行腳本在/sbin下的rc rc rc rc rc rc rc等目錄下每個腳本目錄針
From:http://tw.wingwit.com/Article/program/Java/JSP/201311/19456.html
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