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OpenSolaris 2009.06 - man page for head (opensolaris section 1)

head(1) 				  User Commands 				  head(1)

       head - display first few lines of files

       /usr/bin/head [-number | -n number] [filename]...

       head [-qv] [-n lines] [-c chars] [-s skip][filename]...

       The head utility copies the first number of lines of each filename to the standard output.
       If no filename is given, head copies lines from the standard input. The default	value  of
       number is 10 lines.

       When more than one file is specified, the start of each file looks like:

	 ==> filename <==

       Thus, a common way to display a set of short files, identifying each one, is:

	 example% head -9999 filename1 filename2 ...

       The  head  built-in in ksh93 is associated with the /bin and /usr/bin paths. It is invoked
       when head is executed without a pathname prefix and the pathname search finds a	/bin/head
       or /usr/bin/head executable.

       head copies one or more input files to standard output, stopping at a designated point for
       each file or to the end of the file whichever comes first. Copying ends at the point indi-
       cated  by  the options. By default, a header of the form ==> filename <== is output before
       all but the first file but this can be changed with the -q and -v options. If no  file  is
       given,  or if the file is -, head copies from standard input starting at the current loca-

       The option argument for -c and -s can optionally be followed by one of the following char-
       acters to specify a different unit other than a single byte:

       b    512 bytes

       k    1-kilobyte

       m    1-megabyte

       For backwards compatibility, -number is equivalent to -n number.

       The following options are supported by /usr/bin/head:

       -n number    The  first	number lines of each input file is copied to standard output. The
		    number option-argument must be a positive decimal integer.

       -number	    The number argument is a positive decimal integer with the same effect as the
		    -n number option.

       If no options are specified, head acts as if -n 10 had been specified.

       The following options are supported by the head built-in command in ksh93:

       -n		 Copy lines from each file. The default value is 10.

       -c		 Copy chars bytes from each file.

       -q		 Never output filename headers.

       -s		 Skip skip characters or lines from each file before copying.

       -v		 Always output filename headers.

       The following operand is supported:

       filename    A  path name of an input file. If no file operands are specified, the standard
		   input is used.

       See largefile(5) for the description of the  behavior  of  head	when  encountering  files
       greater than or equal to 2 Gbyte ( 2^31 bytes).

       Example 1 Writing the First Ten Lines of All Files

       The following example writes the first ten lines of all files, except those with a leading
       period, in the directory:

	 example% head *

       See environ(5) for descriptions of the following environment  variables	that  affect  the
       execution of head: LANG, LC_ALL, LC_CTYPE, LC_MESSAGES, and NLSPATH.

       The following exit values are returned:

       0     Successful completion.

       >0    An error occurred.

       See attributes(5) for descriptions of the following attributes:

       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       |Availability		     |SUNWcsu			   |
       |CSI			     |Enabled			   |
       |Interface Stability	     |Committed 		   |
       |Standard		     |See standards(5). 	   |

       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       |Availability		     |SUNWcsu			   |
       |Interface Stability	     |See below.		   |

       The  ksh93  built-in binding to /bin and /usr/bin is Volatile. The built-in interfaces are

       cat(1), ksh93(1), more(1), pg(1), tail(1), attributes(5), environ(5), largefile(5),  stan-

SunOS 5.11				    2 Nov 2007					  head(1)

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