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mksquashfs

NAME

mksquashfs - tool to create and append to squashfs filesystems

SYNOPSIS

mksquashfs SOURCE [SOURCE2 ...] DESTINATION [OPTIONS]

DESCRIPTION

Squashfs is a highly compressed read-only filesystem for Linux. It uses zlib compression to compress both files, inodes and directories. Inodes in the system are very small and all blocks are packed to minimise data overhead. Block sizes greater than 4K are supported up to a maximum of 64K.

Squashfs is intended for general read-only filesystem use, for archival use (i.e. in cases where a .tar.gz file may be used), and in constrained block device/memory systems (e.g. embedded systems) where low overhead is needed.

OPTIONS

-all-root

make all files owned by root.

-always-use-fragments

use fragment blocks for files larger than block size.

-b block_size

set data block to block_size. Default 131072 bytes.

-e exclude

list of exclude dirs/files.

-ef exclude_file

list of exclude dirs/files. One per line.

-force-gid gid

set all file gids to gid.

-force-uid uid

set all file uids to uid.

-fragment-queue size

Set fagment queue to size Mbytes. Default 64 Mbytes.

-info

print files written to filesystem.

-keep-as-directory

if one source directory is specified, create a root directory containing that directory, rather than the contents of the directory.

-noappend

do not append to existing filesystem.

-noDataCompression

alternative name for -noD.

-noD

do not compress data blocks.

-no-duplicates

do not perform duplicate checking.

-no-exports

don't make the filesystem exportable via NFS.

-noF

do not compress fragment blocks.

-noFragmentCompression

alternative name for -noF.

-no-fragments

do not use fragments.

-noI

do not compress inode table.

-noInodeCompression

alternative name for -noI.

-nopad

do not pad filesystem to a multiple of 4K.

-no-progress

don't display the progress bar.

-no-recovery

don't generate a recovery file.

-no-sparse

don't detect sparse files.

-pf pseudo-file

Add list of pseudo file definitions.

-p pseudo-definition

Add pseudo file definition.

-processors number

Use number processors. By default will use number of processors available.

-read-queue size

Set input queue to size Mbytes. Default 64 Mbytes.

-recover name

recover filesystem data using recovery file name.

-regex

Allow POSIX regular expressions to be used in exclude dirs/files.

-root-becomes name

when appending source files/directories, make the original root become a subdirectory in the new root called name, rather than adding the new source items to the original root.

-root-owned

alternative name for -all-root.

-sort sort_file

sort files according to priorities in sort_file. One file or dir with priority per line. Priority -32768 to 32767, default priority 0.

-version

print version, licence and copyright message.

-wildcards

Allow extended shell wildcards (globbing) to be used in exclude dirs/files.

-write-queue size

Set output queue to size Mbytes. Default 512 Mbytes.

SEE ALSO

unsquashfs(1)

HOMEPAGE

More information about mksquashfs and the squashfs filesystem can be found at <http://squashfs.sourceforge.net/>.

AUTHOR

squashfs was written by Phillip Lougher <plougher@users.sourceforge.net>.

This manual page was written by Daniel Baumann <daniel@debian.org>, for the Debian project (but may be used by others).