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MKSQUASHFS(1)		      create and append squashfs filesystems		    MKSQUASHFS(1)

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 minimize 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
   Filesystem build options
       -comp COMPRESSION
	   select COMPRESSION compression. Compressors available: gzip (default), lzo, xz.

       -b BLOCK_SIZE
	   set data block to BLOCK_SIZE. Default 131072 bytes.

       -no-exports
	   don't make the filesystem exportable via NFS.

       -no-sparse
	   don't detect sparse files.

       -no-xattrs
	   don't store extended attributes.

       -xattrs
	   store extended attributes (default).

       -noI
	   do not compress inode table.

       -noD
	   do not compress data blocks.

       -noF
	   do not compress fragment blocks.

       -noX
	   do not compress extended attributes.

       -no-fragments
	   do not use fragments.

       -always-use-fragments
	   use fragment blocks for files larger than block size.

       -no-duplicates
	   do not perform duplicate checking.

       -all-root
	   make all files owned by root.

       -force-uid uid
	   set all file uids to uid.

       -force-gid gid
	   set all file gids to gid.

       -nopad
	   do not pad filesystem to a multiple of 4K.

       -keep-as-directory
	   if one source directory is specified, create a root directory containing  that  direc-
	   tory, rather than the contents of the directory.

   Filesystem filter options
       -p PSEUDO_DEFINITION
	   Add pseudo file definition.

       -pf PSEUDO_FILE
	   Add list of pseudo file definitions.

       -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.

       -ef EXCLUDE_FILE
	   list of exclude dirs/files. One per line.

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

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

   Filesystem append options
       -noappend
	   do not append to existing filesystem.

       -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.

   Mksquashfs runtime options:
       -version
	   print version, licence and copyright message.

       -recover NAME
	   recover filesystem data using recovery file NAME.

       -no-recovery
	   don't generate a recovery file.

       -info
	   print files written to filesystem.

       -no-progress
	   don't display the progress bar.

       -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.

       -write-queue SIZE
	   Set output queue to SIZE Mbytes. Default 512 Mbytes.

       -fragment-queue SIZE
	   Set fragment queue to SIZE Mbytes. Default 64 Mbytes.

   Miscellaneous options
       -root-owned
	   alternative name for -all-root.

       -noInodeCompression
	   alternative name for -noI.

       -noDataCompression
	   alternative name for -noD.

       -noFragmentCompression
	   alternative name for -noF.

       -noXattrCompression
	   alternative name for -noX.

   Compressors available and compressor specific options
       gzip (no options) (default)

       lzo (no options)

       xz

       -Xbcj filter1,filter2,...,filterN
	   Compress using filter1,filter2,...,filterN in turn (in addition  to	no  filter),  and
	   choose  the	best  compression. Available filters: x86, arm, armthumb, powerpc, sparc,
	   ia64.

       -Xdict-size DICT_SIZE
	   Use DICT_SIZE as the XZ dictionary size. The dictionary size can  be  specified  as	a
	   percentage  of  the	block  size, or as an absolute value. The dictionary size must be
	   less than or equal to the block size and  8192  bytes  or  larger.  It  must  also  be
	   storable in the xz header as either 2^n or as 2^n+2^(n+1). Example dict-sizes are 75%,
	   50%, 37.5%, 25%, or 32K, 16K, 8K etc.

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.baumann@progress-technologies.net>.

4.2					    2012-06-30				    MKSQUASHFS(1)
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