Some Info. Post: 302180058

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Top Forums UNIX for Dummies Questions & Answers Some Info. Post 302180058 by era on Saturday 29th of March 2008 12:31:53 PM

03-29-2008

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The question about OS is not really well-defined. Probably uname -o is sufficient, yes. It is customary if somebody asks to include more or less all of uname -a

uname -n prints the system's name, so you don't have to use awk for that. grep is not really the right tool for this (although it could probably be done).

Generally a well-designed Unix tool will have an option to generate output in a form which is useful for scripting. Unfortunately, not nearly all system utilities are well-designed by this criterion. (ls comes to mind, and, oh, ifconfig.)

This message box is too small for a good awk tutorial (and I'm not the right person to write that) but a general pattern is awk '/text which is unique for the line you want/ { print $n }' where n is the field number (space-separated, starting from 1) on that line. There are various facilities for using something other than spaces as separators, and, well, awk is a Turing-complete programming language, so your imagination is really the only limit.

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LEARN ABOUT BSD

uname

UNAME(1)						      General Commands Manual							  UNAME(1)

NAME

       uname - display information about the system

SYNOPSIS

       uname [-amnrsv]

DESCRIPTION

       The  uname  command  writes the name of the operating system implementation to standard output.	When options are specified, strings repre-
       senting one or more system characteristics are written to standard output.

       The options are as follows:

       -a	 Behave as though the options -m, -n, -r , -s, and -v were specified.

       -m	 Write the type of the current hardware platform to standard output.

       -n	 Write the name of the system to standard output.

       -r	 Write the current release level of the operating system to standard output.

       -s	 Write the name of the operating system implementation to standard output.

       -v	 Write the version level of this release of the operating system to standard output.

       If the -a flag is specified, or multiple flags are specified, all output is written on a single line, separated by spaces.

       The uname utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

       sysctl(8), sysctl(3), uname(3)

HISTORY

       The uname command appeared in 4.4BSD.

STANDARDS

       The command is expected to conform to the IEEE Std1003.2 (``POSIX'') specification.

4th Berkeley Distribution					 February 4, 1995							  UNAME(1)

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