Installation guide

Chapter 2. The proc File System 33
• MemFree — The amount of physical RAM, in kilobytes, left unused by the system.
• MemShared — Unused with 2.4 and higher kernels but left in for compatibility with earlier kernel
versions.
• Buffers — The amount of physical RAM, in kilobytes, used for file buffers.
• Cached — The amount of physical RAM, in kilobytes, used as cache memory.
• Active — The total amount of buffer or page cache memory, in kilobytes, that is in active use.
• Inact_dirty — The total amount of buffer or cache pages, in kilobytes, that might be free and
available.
• Inact_clean — The total amount of buffer or cache pages in kilobytes that are definitely free and
available.
• Inact_target — The net amount of allocations per second, in kilobytes, averaged over one
minute.
• HighTotal and HighFree — The total and free amount of memory, respectively, that is not di-
rectly mapped into kernel space. The HighTotal value can vary based on the type of kernel used.
• LowTotal and LowFree — The total and free amount of memory, respectively, that is directly
mapped into kernel space. The LowTotal value can vary based on the type of kernel used.
• SwapTotal — The total amount of swap available, in kilobytes.
• SwapFree — The total amount of swap free, in kilobytes.
2.2.20. /proc/misc
This file lists miscellaneous drivers registered on the miscellaneous major device, which is device
number 10:
135 rtc
1 psaux
134 apm_bios
The first column is the minor number of each device, and the second column shows the driver in use.
2.2.21. /proc/modules
This file displays a list of all modules loaded into the kernel. Its contents will vary based on the
configuration and use of your system, but it should be organized in a similar manner to this sample
/proc/modules file output:
ide-cd 27008 0 (autoclean)
cdrom 28960 0 (autoclean) [ide-cd]
soundcore 4100 0 (autoclean)
agpgart 31072 0 (unused)
binfmt_misc 5956 1
iscsi 32672 0 (unused)
scsi_mod 94424 1 [iscsi]
autofs 10628 0 (autoclean) (unused)
tulip 48608 1
ext3 60352 2
jbd 39192 2 [ext3]
The first column contains the name of the module. The second column refers to the memory size of the
module, in bytes. The third column tells you whether the module is currently loaded (1) or unloaded