<!DOCTYPE html> <html lang='en'> <head> <title>mkinitfs-bootparam.7.in - mkinitfs - Tool to create initramfs images </title> <meta name='generator' content='cgit v1.1'/> <meta name='robots' content='index, nofollow'/> <link rel='stylesheet' type='text/css' href='/cgit.css'/> <link rel='shortcut icon' href='//alpinelinux.org/alpine-logo.ico'/> <link rel='alternate' title='Atom feed' href='https://git.alpinelinux.org/cgit/mkinitfs/atom/mkinitfs-bootparam.7.in?h=master' type='application/atom+xml'/> <link rel='vcs-git' href='git://git.alpinelinux.org/mkinitfs' title='mkinitfs Git repository'/> <link rel='vcs-git' href='https://git.alpinelinux.org/cgit/mkinitfs' title='mkinitfs Git repository'/> </head> <body> <div id='cgit'><table id='header'> <tr> <td class='logo' rowspan='2'><a href='/cgit/'><img src='//wiki.alpinelinux.org/w/resources/assets/alogo.png' alt='cgit logo'/></a></td> <td class='main'><a href='/cgit/'>index</a> : <a title='mkinitfs' 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startup"

NAME

alpine-bootparams - control the startup behavior using the kernel command line

DESCRIPTION

In early boot, the preferred way to supply configuration data to the running system is via kernel options. The kernel options are specified in the bootloader configuration and are supplied to the kernel and early userspace in early boot. The mechanism and options that are interpreted by the kernel itself are documented in bootparam(7).

The options documented here are interpreted by the initramfs-init script that is part of the initramfs, see mkinitfs(1) to learn how to customize it.

blacklist=MODULE{,MODULE} This comma-separated list names kernel modules that modprobe will reject to load.

chart Enables bootchartd for measuring system startup speed.

cryptdiscards Enable the discard feature for encrypted Solid State Disks. This might have security implications.

cryptdm=NAME After the block device has been decrypted, make it available as /dev/mapper/NAME.

cryptheader=DEVICE When the LUKS headers and encrypted data are on different devices, this option specifies the device with the LUKS headers.

cryptkey=KEYFILE Attempt to decrypt an encypted partition using an keyfile.

cryptoffset=SECTORS Indicate that the encrypted data begins the given number of sectors after the start of the block device.

cryptroot=DEVICE Attempt to decrypt DEVICE.

dasd Enable DASD devices on S/390x architectures.

debug_init Print debug information during boot.

init_args=ARGUMENTS Additional command like arguments for /sbin/init.

ip=CLIENT-IP::GATEWAY-IP:NETMASK::INTERFACE Specify the network configuration as a colon-separated list of variable length. The 3rd and the 5th list item is ignored. The format is compatible with the SYSAPPEND option of syslinux. Use ip=dhcp for automatic configuration via DHCP.

modules=MODULE{,MODULE} Comma-sparated list of kernel modules to load explicitly.

nodma Disable DMA for ATA devices.

overlaytmpfs When booting from an read-only partition, you can specify this flag to have your changes written to an in-memory overlayfs.

quiet Generate less output.

resume=DEVICE Swap partition to resume from.

root=(DEVICE | nfs:IP-ADDRESS:PATH) Device or NFS url for the root partition.

rootflags=OPTIONS Mount options for the device specified with root=.

rootfstype=FS_TYPE File system type for the device specified with root=. Allowed values are the same like the -t option for mount(1).

s390x_net=qeth_l2,BUS-ID{,BUS-ID} Configure network devices for the S/390x architecture.

single Launch root shell before switching to the root partition.

If no root= parameter is given, the initramfs will build an live system in memory from scratch. This is also called diskless mode.

When booting in diskless mode, the following options are also available:

alpine_repo=(URL | PATH) If set, /etc/apk/repositories will be filled with this. May be an URL.

apkovl=(URL | [DEVICE[:FS_TYPE]:]PATH) A HTTP, HTTPS or FTP URL to an apkovl.tar.gz file which will be retrieved and applied. Can also be an filesystem path, optionally prepended with the device name without the /dev/ prefix.

nokeep_apk_new Setup a fresh system, ignore any apkovl.

pkgs=PACKAGE{,PACKAGE} Comma-separated list of packages to be installed.

ssh_key=(URL | SSH_KEY) This setting installs openssh and places the public key given as value in /root/.ssh/authorized_keys. If the value is an HTTP or FTP url, its fetches the key(s) from there.

splash Enable splash screen

usbdelay=NUMBER Wait NUMBER seconds for USB devices to show up before searching for boot media.

FILES

&#64;datadir&#64;/initramfs-init Default script that will be run in the initramfs.

AUTHOR

Written by Natanael Copa <ncopa&#64;alpinelinux.org>, Timo Teräs <timo.teras&#64;iki.fi> and others.

"REPORTING BUGS"

Alpine Linux Bugtracker: <https://bugs.alpinelinux.org/projects/alpine/issues>

"SEE ALSO"

nlplug-findfs(1), mkinitfs(1), bootparam(7) </code></pre></td></tr></table> </div> <!-- class=content --> <script type="text/javascript"> var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); </script> <script type="text/javascript"> try { var pageTracker = _gat._getTracker("UA-2804446-12"); pageTracker._trackPageview(); } catch(err) {}</script> </div> <!-- id=cgit --> </body> </html>

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