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 con-
       strained 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 directory, 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)