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by mmach
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.TH UPDATE-INITRAMFS 8 "2014/10/16" "initramfs\-tools" "System Administration" |
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.SH NAME |
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update\-initramfs \- generate an initramfs image |
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.SH SYNOPSIS |
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.B update\-initramfs |
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.RB { \-c | \-d | \-u } |
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.RB [ \-k |
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.IR version ] |
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.RB [ \-v ] |
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.RB [ \-b |
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.IR directory ] |
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.br
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.BR update\-initramfs " " \-h |
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.SH DESCRIPTION |
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The |
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.B update\-initramfs |
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script manages your initramfs images on your local box. |
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It keeps track of the existing initramfs archives in /boot. |
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There are three modes of operation create, update or delete. |
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You must at least specify one of those modes. |
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The initramfs is a gzipped cpio archive. |
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At boot time, the kernel unpacks that archive into RAM disk, mounts and |
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uses it as initial root file system. All finding of the root device |
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happens in this early userspace. |
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.SH OPTIONS |
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.TP
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\fB\-k \fI version |
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Set the specific kernel version for whom the initramfs will be generated. |
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For example the output of uname \-r for your currently running kernel.
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This argument is optional for update. The default is the latest kernel version. |
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The use of "all" for the |
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.I version |
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string specifies that |
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.B update\-initramfs |
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should operate on all installed kernel versions (with \fB\-c\fR), or |
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on all installed kernel versions that already have an initramfs |
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(with \fB\-d\fR or \fB\-u\fR). |
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.TP
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\fB\-c
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This mode creates a new initramfs. |
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.TP
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\fB\-u
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This mode updates an existing initramfs. |
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.TP
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\fB\-d
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This mode deletes an existing initramfs. |
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.TP
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\fB\-v
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This option increases the amount of information you are given during |
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the chosen action. |
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.TP
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\fB\-b \fI directory |
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Set an different bootdir for the image creation. |
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.TP
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\fB\-h\fR, \fB--help\fR |
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Print a short help page describing the available options in |
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.B update\-initramfs. |
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.SH EXAMPLES |
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Update the initramfs of the newest kernel: |
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.PP
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.B update\-initramfs -u |
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Create the initramfs for a specific kernel: |
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.PP
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.B update\-initramfs -c -k 2.6.18-1-686 |
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.SH FILES |
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/etc/initramfs-tools/update-initramfs.conf |
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.SH AUTHOR |
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The initramfs-tools are written by Maximilian Attems <maks@debian.org>, |
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Jeff Bailey <jbailey@raspberryginger.com> and numerous others. |
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.SH SEE ALSO |
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.BR
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.IR initramfs.conf (5), |
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.IR initramfs-tools (7), |
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.IR mkinitramfs (8), |
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.IR lsinitramfs (8). |