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s2both(8) [centos man page]

S2DISK(8)                                                             s2disk                                                             S2DISK(8)

NAME
s2disk - program to suspend to disk (hibernate) SYNOPSIS
s2disk [-h, --help] [-V, --version] [-f, --config config_file] [-r, --resume_device device] [-o, --resume_offset offset] [-s, --image_size size] [-P, --parameter parameter] resume DESCRIPTION
This manual page documents briefly the s2disk, s2both and resume commands. This manual page was written for the Debian(TM) distribution because the original program does not have a manual page. s2disk is a program that will save the state of the whole system to disk and power off your system. After restarting your system it will be put back in the exact system state you left it (this is sometimes called hibernation). s2both will do precisly the same as s2disk except that it will not power off the system, but will suspend it to ram (put the system in S3 mode). This has the advantage that resume will be faster, with the disadvantage that you still use batteries. If they batteries do deplete, you still have the system state saved to disk and can resume without data loss. The s2both command also inherits all command line arguments from s2ram. You will need to set up an initramfs which calls the resume program for this to work. If you use an Debian(TM) kernel package which was made with the --initrd option and you use mkinitramfs-tools, this package should include the necessary parts on your initramfs. The uswsusp system supports encrypting the image written to disk and features a splash system, see uswsusp.conf(8) for more information OPTIONS
-f, --config [file] Specify alternate configuration file. -h, --help Display help. -r, --resume_device [device] Device that contains swap area. -o, --resume_offset [offset] Offset of swap file in resume device. -s, --image_size [size] Desired size of the image. -P, --parameter [key=value] Override any config file parameter (see uswsusp.conf(8)). For the meaning and use of the resume_size, resume_offset and image_size options see uswsusp.conf(8). SEE ALSO
uswsusp.conf(8), suspend-keygen(8), s2ram(8) For more information see the HOWTO and the README AUTHOR
This manual page was written by Tim Dijkstra tim@famdijkstra.org for the Debian(TM) system (but may be used by others). Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 any later version published by the Free Software Foundation. On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL. AUTHOR
TimTim DijkstraDijkstra <tim@famdijkstra.org> <tim@famdijkstra.org> Wrote this manpage for the Debian system. COPYRIGHT
Copyright (C) 2006 Tim Dijkstra uswsusp juni 24, 2006 S2DISK(8)

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USWSUSP.CONF(5) 						   uswsusp.conf 						   USWSUSP.CONF(5)

NAME
uswsusp.conf - Config file for the s2disk program DESCRIPTION
This manual page documents briefly the uswsusp.conf file used by the s2disk, s2both and resume commands. This manual page was written for the Debian(TM) distribution because the original program does not have a manual page. s2disk is a program that will save the the state of the whole system to disk and power off your system. After restarting your system it will be put back in the exact system state you left it (this is sometimes called hibernation). On a Debian(TM) system you can run dpkg-reconfigure uswsusp to manage this file. OPTIONS
snapshot device [=/dev/snapshot] Device via which s2disk should talk to the kernel. resume device Specifies the device to write the image to. This is a swap partition or the partition that contains the swap file (see next parameter). resume offset Necessary if a swap file is used for suspending. In such a case the device identified by the "resume device" parameter is regarded as the partition that contains the swap file, and "resume offset" must be equal to the offset from the beginning of this partition at which the swap file's header is located, in <PAGE_SIZE> units. The value of this parameter for given swap file can be determined by the swap-offset program (has to be run as root) included in this package. [For this feature to work, you will need an -mm kernel, 2.6.18-mm3 or newer.] image size Limit the size of the system snapshot image created by the s2disk tool, but it's not mandatory. Namely, the s2disk tool will do its best to limit the image size as required by this parameter, but if that's not possible, it will suspend the system anyway, with a bigger image. If "image size" is set to 0, the snapshot image will be as small as possible. suspend loglevel You can specify the kernel console loglevel which the s2disk/s2both and resume utilities will use to report progress. On a stock kernel messages with level higher then 7 are usually not shown. shutdown method This parameter defines the operation that will be carried out after the suspend image has been created and the machine is ready to be powered off. If it is set to "reboot", the machine will be rebooted immediately. If it is set to "platform", the machine will be shut down using special power management operations available from the kernel that may be necessary for the hardware to be properly reinitialized after the resume, and may cause the system to resume faster (this is the recommended shutdown method on the majority of systems and hence the defaul). If set to "shutdown" the machine will be powered off. compute checksum If the "compute checksum" parameter is set to 'y', the s2disk and resume tools will use the MD5 algorithm to verify the image integrity. compress If the "compress" parameter is set to 'y', the s2disk and resume tools will use the LZF compression algorithm to compress/decompress the image. encrypt If the "encrypt" parameter is set to 'y', the s2disk and resume tools will use the Blowfish encryption algorithm to encrypt/decrypt the image. On resume and suspend you will have to supply a passphrase. By using a pregenerated RSA key, you can avoid having to type a passphrase on suspend. See the "RSA key file" option for more information. RSA key file If this option points to a valid RSA key, which can be created with suspend-keygen, the s2disk tool will generate a random key for the Blowfish encryption that will be passed to the resume tool within the image header with the help of the RSA cipher. Consequently you only need to type a passphrase on resume. early writeout If the "early writeout" parameter is set to 'y', the s2disk utility will start syncing the resume device early in the process of writing the image to it. [This has been reported to speed up the s2disk on some boxes and eliminates the "fast progress meter and long fsync wait" effect.] splash The "splash" parameter is used to make s2disk and/or resume use a splash system (when set to 'y'). Currently the bootsplash.org and splashy systems are supported. For the former you need a kernel patch, the latter is a userspace solution, but you'll need to install a splashy theme. If you use initramfs-tools on Debian(TM) to generate your initramfs (and have splashy installed), the necessary files will be copied to it. SEE ALSO
s2disk (8). suspend-keygen(8) AUTHOR
This manual page was written by Tim Dijkstra tim@famdijkstra.org for the Debian(TM) system (but may be used by others). Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 any later version published by the Free Software Foundation. On Debian(TM) systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL. AUTHOR
TimTim DijkstraDijkstra <tim@famdijkstra.org> <tim@famdijkstra.org> Wrote this manpage for the Debian system. COPYRIGHT
Copyright (C) 2006 Tim Dijkstra uswsusp juni 24, 2006 USWSUSP.CONF(5)

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