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in/grub/modules.rst

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+.. _grub_modules:
+
+*******
+Modules
+*******
+
+===== ==========================
+date  display/set date/time
+echo  display message
+eval  expression evaluation
+help  commands and args
+sleep escape interruptible pause
+test  if then else fi
+true  true/false nop commands
+===== ==========================
+
+=========== ============================================
+at_keyboard keyboard layouts handling for terminal_input
+keylayouts  change keyboard layout
+keystatus   test alt/ctrl/shift keys
+read        variable until enter
+=========== ============================================
+
+====== ========
+halt   shutdown
+reboot restart
+====== ========
+
+========= =========================================
+biosdisk  disks detection via bios
+cpuid     check if cpu can handle 64 bit and/or PAE
+lspci     list pci devices
+videoinfo list video modes
+========= =========================================
+
+========== ======================================
+part_gpt   guid partition table partitions scheme
+part_msdos master boot record partitions scheme
+========== ======================================
+
+=========== ================================================
+btrfs       | better file system
+exfat       | ms extended file allocation table file system
+ext2        | linux file systems
+fat         | ms file allocation table file system
+hfs         | apple file system
+hfspluscomp | apple extended file system with compression
+iso9660     | older optical disk file system
+ntfscomp    | ms new technology file system with compression
+tar         | tar archive format handling
+            | (for embedded fonts,locales,etc.)
+udf         | optical disk file system
+=========== ================================================
+
+====== =====================================
+search set root according to uuid/label/file
+====== =====================================
+
+=========== ===================================
+cat         display file content
+configfile  load different menu/script file
+gcry_crc    crc hash algorithm
+gcry_md5    md5 hash algorithm
+gcry_sha1   sha1 hash algorithm
+gcry_sha256 sha256 hash algorithm
+gcry_sha512 sha512 hash algorithm
+hashsum     hash file, needs gcry_ modules
+loadenv     load and save menu environment file
+testspeed   file loading benchmark
+=========== ===================================
+
+======== =================================
+loopback turn a file into a virtual device
+memdisk  ram disk
+======== =================================
+
+===== =========================
+linux kernel & initial ram disk
+===== =========================
+
+================== ===========================
+gfxterm_background | color/image
+                   | triggers graphic terminal
+jpeg               | jpeg image format
+png                | png image format
+tga                | tga image format
+================== ===========================