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Full Discussion: Perl regular expression
Top Forums Shell Programming and Scripting Perl regular expression Post 302694189 by CarloM on Thursday 30th of August 2012 09:08:30 AM
Old 08-30-2012
I'm not terribly familiar with perl, but assuming the s/... works like normal sed: I would guess it's matching the entire 'ram' element @actiontext[2], but you're only replacing the 'ram' part with $2 (or actually nothing, for that match) - leaving the remainder of that element to be put into @action[1].
 

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LEARN ABOUT CENTOS

new-kernel-pkg

NEW-KERNEL-PKG(8)					      System Manager's Manual						 NEW-KERNEL-PKG(8)

NAME

       new-kernel-pkg - tool to script kernel installation

SYNOPSIS

       new-kernel-pkg [-v] [--mkinitrd] [--rminitrd] [--dracut]
	      [--initrdfile=initrd-image [--depmod] [--rmmoddep]
	      [--kernel-args=args] [--remove-args=args]
	      [--banner=banner] [--multiboot=multiboot]
	      [--mbargs=mbargs] [--make-default] [--add-dracut-args]
	      [--add-plymouth-initrd] [--host-only]
	      <--install | --remove | --update | --rpmposttrans> <kernel-version>

DESCRIPTION

       new-kernel-pkg  is a tool used in packaging to automate the installation of a new kernel, including the creation of an initial ram filesys-
       tem image, updating of bootloader configuration, and other associated tasks.

OPTIONS

       -v     Be verbose.

       --mkinitrd
	      Create a new initial ram filesystem image.

       --rminitrd
	      Remove an initial ram filesystem image.

       --dracut
	      When creating a new initial ram filesystem image, use dracut(8) rather than mkinitrd(8).	Used in conjunction with --mkinitrd .

       --initrdfile=initrd-image
	      Use the specified file as the initial ram filesystem image.

       --depmod
	      Create modules.dep and related files.

       --rmmoddep
	      Remove modules.dep and related files.

       --kernel-args=args
	      Use args as the boot command line for this kernel.

       --remove-args=args
	      Remove specified kernel arguments for this kernel.

       --banner=banner
	      Display banner as the banner text in the bootloader.

       --multiboot=multiboot-image
	      Use multiboot-image as a multiboot image.

       --mbargs=mbargs
	      Use mbargs as arguments to the multiboot image.

       --make-default
	      Make this kernel the default boot option.

       --add-dracut-args
	      Automatically generate dracut options and add them to the kernel command line.

       --add-plymouth-initrd
	      Automatically add plymouth to the initial ram filesystem image.

       --host-only
	      Make an initial ram filesystem image that is specific to the running system.

       --install kernel-version
	      Install a new kernel.

       --remove kernel-version
	      Remove an installed kernel.

       --update kernel-version
	      Update the specified kernel.

       --rpmposttrans kernel-version
	      Run the rpmposttrans for the specified kernel.

SEE ALSO

       grubby(8) installkernel(8)

AUTHORS

       Erik Troan
       Jeremy Katz
       Peter Jones

								  Wed Apr 14 2010						 NEW-KERNEL-PKG(8)
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