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    Command:

    mkfs.cramfs

    
    
    

    SYNOPSIS

           mkfs.cramfs [options] directory file
    
    
    

    DESCRIPTION

           Files  on cramfs file systems are zlib-compressed one page at a time to
           allow random read access.  The  metadata  is  not  compressed,  but  is
           expressed  in  a terse representation that is more space-efficient than
           conventional file systems.
    
           The file system is intentionally read-only to simplify its design; ran-
           dom  write  access  for  compressed  files  is  difficult to implement.
           cramfs ships with a utility (mkcramfs) to pack files  into  new  cramfs
           images.
    
           File sizes are limited to less than 16MB.
    
           Maximum  file  system  size is a little under 272MB.  (The last file on
           the file system must begin before the 256MB block, but can extend  past
           it.)
    
    
    

    ARGUMENTS

           The  directory is simply the root of the directory tree that we want to
           generate a compressed filesystem out of.
    
           The file will contain the cram file system, which later can be mounted.
    
    
    

    OPTIONS

           -v     Enable verbose messaging.
    
           -E     Treat  all  warnings  as  errors, which are reflected as command
                  return value.
    
           -b blocksize
                  Use defined block size, which has to be divisible by page  size.
    
           -e edition
                  Use defined file system edition number in superblock.
    
           -N big, little, host
                  Use defined endianness.  Value defaults to host.
    
           -i file
                  Insert a file to cramfs file system.
    
           -n name
                  Set name of the cramfs file system.
    
           -p     Pad by 512 bytes for boot code.
    
           -s     This  option  is ignored.  Originally the -s turned on directory
                  entry sorting.
    
    
    

    AVAILABILITY

           The  example command is part of the util-linux package and is available
           from Linux Kernel Archive
    
    
    

    util-linux April 2013 EXAMPLE(8)

    
    
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