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Full Discussion: best way to insert a line at the top of a file?
Top Forums Shell Programming and Scripting best way to insert a line at the top of a file? Post 302285780 by quirkasaurus on Monday 9th of February 2009 04:06:16 PM
Old 02-09-2009
you mean on a file that's already there???

if the file in question isn't so huge it crashes vi, try this:

Code:
vi file << EOF
OWhatever you want as first line
^[:wq!
EOF

Where the ^[ is actually the ESCAPE character entered ( through vi ) with
CONTROL-V and ESC.
 

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LEARN ABOUT CENTOS

pagesize

PAGESIZE(1)						      General Commands Manual						       PAGESIZE(1)

NAME

       pagesize - Print supported system page sizes

SYNOPSIS

       pagesize [options]

DESCRIPTION

       The  pagesize utility prints the page sizes of a page of memory in bytes, as returned by getpagesizes(3). This is useful when creating por-
       table shell scripts, configuring huge page pools with hugeadm or launching applications to use huge pages with hugectl.

       If no parameters are specified, pagesize prints the system base page size as returned by getpagesize().	The  following	parameters  affect
       what other pagesizes are displayed.

       --huge-only, -H

	      Display all huge pages supported by the system as returned by gethugepagesizes().

       --all, -a

	      Display all page sizes supported by the system.

SEE ALSO

       oprofile(1), getpagesize(2), getpagesizes(3), gethugepagesizes(3), hugectl(7), hugeadm(7), libhugetlbfs(7)

AUTHORS

       libhugetlbfs was written by various people on the libhugetlbfs-devel mailing list.

								 October 10, 2008						       PAGESIZE(1)
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