сделать сжатую файловую систему ROM (make compressed ROM file system)
Имя (Name)
mkfs.cramfs - make compressed ROM file system
Синопсис (Synopsis)
mkfs.cramfs [options] directory file
Описание (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; random write access for compressed files is difficult to
implement. cramfs ships with a utility (mkcramfs(8)) to pack
files into new cramfs images.
File sizes are limited to less than 16 MB.
Maximum file system size is a little under 272 MB. (The last file
on the file system must begin before the 256 MB block, but can
extend past it.)
Аргументы (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.
Параметры (Options)
-v
Enable verbose messaging.
-E
Treat all warnings as errors, which are reflected as command
exit status.
-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.
-z
Make explicit holes.
-h, --help
Display help text and exit.
-V, --version
Display version information and exit.
Статус выхода (Exit)
0
success
8
operation error, such as unable to allocate memory
Смотри также (See also)
fsck.cramfs(8), mount(8)
Сообщение об ошибках (Reporting bugs)
For bug reports, use the issue tracker at
https://github.com/karelzak/util-linux/issues.
Доступность (Availability)
The mkfs.cramfs command is part of the util-linux package which
can be downloaded from Linux Kernel Archive
<https://www.kernel.org/pub/linux/utils/util-linux/>. This page
is part of the util-linux (a random collection of Linux
utilities) project. Information about the project can be found at
⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you have
a bug report for this manual page, send it to
util-linux@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on
2021-08-27. (At that time, the date of the most recent commit
that was found in the repository was 2021-08-24.) If you discover
any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page,
or you have corrections or improvements to the information in
this COLOPHON (which is not part of the original manual page),
send a mail to man-pages@man7.org
