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Sample ASX/U Basic Frequently Asked Questions
What are the basic concepts required for new users?
Unix is an operating system, similar to MS-DOS, only much more powerful. Some versions have over 300 commands in the basic system, not including specialized applications.
There are several different shells which are widely used, so the prompts you see on your screen, and the responses you see may vary slightly. However, the commands here should work in all of the shells. Note that users with Graphical User Interfaces (X Windows, Openview, etc.) may have to use the "shelltool" or "command window" to use these commands.
When you enter Unix commands, you will usually enter two or three words: the "command" itself, "modifier(s)" which change the way the command works, and "argument(s)" which provide the command with additional information. Each word in the command is separated by a space, and modifiers are preceded by a hyphen (-).
The Unix system uses a hierarchical directory structure; to store files on its disks. This type of structure is like an upside-down tree, with one "root" directory (like the root and trunk of a tree), and many sub-directories (like branches) to store files in.
How do I determine which login shell I am using?
Read the /etc/passwd file. Each line contains login information for each user. For example:
more /etc/passwd
:
asx::999:999:ASX Demo:/export/home/asx:/bin/csh
the above line indicates that C shell (csh) is used as user asx login shell.
How do I determine the operating system release version?
Type "uname -rs ".
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