{"id":3068,"date":"2022-12-20T16:43:25","date_gmt":"2022-12-20T19:43:25","guid":{"rendered":"http:\/\/lode.uno\/linux-man\/index.php\/2022\/12\/20\/mkfs-cramfs-man8\/"},"modified":"2022-12-20T16:43:25","modified_gmt":"2022-12-20T19:43:25","slug":"mkfs-cramfs-man8","status":"publish","type":"post","link":"https:\/\/lode.uno\/linux-man\/2022\/12\/20\/mkfs-cramfs-man8\/","title":{"rendered":"MKFS.CRAMFS (man8)"},"content":{"rendered":"

MKFS.CRAMFS<\/h1>\n

NAME<\/a>
SYNOPSIS<\/a>
DESCRIPTION<\/a>
ARGUMENTS<\/a>
OPTIONS<\/a>
EXIT STATUS<\/a>
SEE ALSO<\/a>
AVAILABILITY<\/a> <\/p>\n

\n

NAME <\/a> <\/h2>\n

mkfs.cramfs \u2212 make compressed ROM file system<\/p>\n

SYNOPSIS <\/a> <\/h2>\n

mkfs.cramfs<\/b> [options] directory file<\/i><\/p>\n

DESCRIPTION <\/a> <\/h2>\n

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.<\/p>\n

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) to pack files into new cramfs images.<\/p>\n

File sizes are limited to less than 16\u00a0MB.<\/p>\n

Maximum file system size is a little under 272\u00a0MB. (The last file on the file system must begin before the 256\u00a0MB block, but can extend past it.)<\/p>\n

ARGUMENTS <\/a> <\/h2>\n

The directory<\/i> is simply the root of the directory tree that we want to generate a compressed filesystem out of.<\/p>\n

The file<\/i> will contain the cram file system, which later can be mounted.<\/p>\n

OPTIONS <\/a> <\/h2>\n\n\n\n
<\/td>\n\n

\u2212v<\/b><\/p>\n<\/td>\n

<\/td>\n\n

Enable verbose messaging.<\/p>\n<\/td>\n<\/tr>\n

<\/td>\n\n

\u2212E<\/b><\/p>\n<\/td>\n

<\/td>\n\n

Treat all warnings as errors, which are reflected as command exit status.<\/p>\n<\/td>\n<\/tr>\n<\/table>\n

\u2212b<\/b> blocksize<\/i><\/p>\n

Use defined block size, which has to be divisible by page size.<\/p>\n

\u2212e<\/b> edition<\/i><\/p>\n

Use defined file system edition number in superblock.<\/p>\n

\u2212N<\/b> big, little, host<\/i><\/p>\n

Use defined endianness. Value defaults to host<\/i>.<\/p>\n

\u2212i<\/b> file<\/i><\/p>\n

Insert a file<\/i> to cramfs file system.<\/p>\n

\u2212n<\/b> name<\/i><\/p>\n

Set name of the cramfs file system.<\/p>\n\n\n\n\n
<\/td>\n\n

\u2212p<\/b><\/p>\n<\/td>\n

<\/td>\n\n

Pad by 512 bytes for boot code.<\/p>\n<\/td>\n<\/tr>\n

<\/td>\n\n

\u2212s<\/b><\/p>\n<\/td>\n

<\/td>\n\n

This option is ignored. Originally the \u2212s turned on directory entry sorting.<\/p>\n<\/td>\n<\/tr>\n

<\/td>\n\n

\u2212z<\/b><\/p>\n<\/td>\n

<\/td>\n\n

Make explicit holes.<\/p>\n<\/td>\n<\/tr>\n<\/table>\n

\u2212h<\/b>, \u2212\u2212help<\/b><\/p>\n

Display help text and exit.<\/p>\n

\u2212V<\/b>, \u2212\u2212version<\/b><\/p>\n

Display version information and exit.<\/p>\n

EXIT STATUS <\/a> <\/h2>\n\n\n\n
<\/td>\n\n

0<\/b><\/p>\n<\/td>\n

<\/td>\n\n

success<\/p>\n<\/td>\n<\/tr>\n

<\/td>\n\n

8<\/b><\/p>\n<\/td>\n

<\/td>\n\n

operation error, such as unable to allocate memory<\/p>\n<\/td>\n<\/tr>\n<\/table>\n

SEE ALSO <\/a> <\/h2>\n

fsck.cramfs<\/b>(8), mount<\/b>(8)<\/p>\n

AVAILABILITY <\/a> <\/h2>\n

The mkfs.cramfs command is part of the util-linux package and is available from Linux Kernel Archive<\/a>.<\/p>\n

\n","protected":false},"excerpt":{"rendered":"

mkfs.cramfs \u2212 make compressed ROM file system <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[5,52,4,40],"class_list":["post-3068","post","type-post","status-publish","format-standard","hentry","category-8-administracion-del-sistema","tag-5","tag-administracion","tag-man8","tag-mkfs"],"gutentor_comment":0,"_links":{"self":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/3068","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/comments?post=3068"}],"version-history":[{"count":0,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/3068\/revisions"}],"wp:attachment":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/media?parent=3068"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/categories?post=3068"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/tags?post=3068"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}