1. Daemons
2. Shell
3. File System
4. Kernel
5. O.S
A daemon is a program that resides in system memory. When called upon it performs a specific system function. Admin can specify which daemons they wish their system to run using scripts or start them manually from the command line.
The shell interprets and translates commands entered by the user into actions performed by the system. There are 6 by default in Solaris 8:
Bourne, Korn , C , Z , TC , and BASH.
Data on Solaris system is stored in a hierarchical fashion on the F.S. Organizing data in this way makes it easy to locate and group related O.S ctrl files and user info.
Acts as an intermediary bet App and HW inside the computer. It ctrls physical & virtual mem, schedules processes, and starts and stops daemons. All cmds interact with the kernel.
An O.S is the intermediary bet users and computer. It accepts user i/p, routes it to the proper device for processing and returns pgm o/p back to the user. O.S interacts with peripherals through device drivers written specially for each component of the system.
Man(Manual Pages) Pages provide online assitance for almost all UNIX cmds on the system.
Checking these files for help on args and switches, as well as sample cmds, provides good background for the proper use of a cmd.
# man ls
will display a specially formatted text file that has info about ls.
* If the man page takes up more than 1 screen, the space bar will cont. listing the file 1 screen at a time.
* Pressing 'b' key will back the display up 1 screen.
* Pressing <enter> will display the file one line at a time.
* The '/' will allow a search string to be entered and file will be searched for the keyword.
* Pressing 'n' once a keyword is found will cause the man to cont. searching for the string in the file until the next occurence.
* Typing 'h' will display all the cmds that can be used while viewing man pages.
* -k The Keyword Switch is used for searching for keywords
# man -k ipconfig
* -M The Path Cmd allows you to specify a diff path to a man page
# man -M /opt/s1as/man <command name>
*-a used to view all the available pages on a cmd.
#man -a useradd
* -f used to search and view brief summaries
# man -f swap
* -s used to view specified sections of available man pages for a cmd
# man -s 8 useradd