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Top Forums UNIX for Dummies Questions & Answers Help needed to understand partitions in linux Post 302415695 by Celtic_Monkey on Friday 23rd of April 2010 06:47:21 AM
Old 04-23-2010
Quote:
Originally Posted by pinga123
Does this means if i have 2 gb as my physical memory space and if i allocate tmpfs 1 gb then i can only use 1 gb of my physical memory?
Instead of allocating a fixed amount of memory for exclusive use as a file system, tmpfs file system
is dynamic depending on use, allowing the system to decide the optimal use of memory

physical memory gets reduced and then your into the realms of swapping / swap space etc

Last edited by Celtic_Monkey; 04-23-2010 at 08:16 AM..
 

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PARTX(8)						      System Manager's Manual							  PARTX(8)

NAME
partx - telling the kernel about presence and numbering of on-disk partitions. SYNOPSIS
partx [-a|-d|-l] [--type TYPE] [--nr M-N] [partition] disk DESCRIPTION
Given a block device ( disk ) and a partition table type , try to parse the partition table, and list the contents. Optionally add or remove partitions. This is not an fdisk - adding and removing partitions is not a change of the disk, but just telling the kernel about presence and numbering of on-disk partitions. OPTIONS
-a add specified partitions or read disk and add all partitions -d delete specified or all partitions -l list partitions. Note that the all numbers are in 512-byte sectors. --type TYPE Specify the partition type -- dos, bsd, solaris, unixware or gpt. --nr M-N Specify the range of partitions (e.g --nr 2-4). SEE ALSO
addpart(8), delpart(8), fdisk(8), parted(8), partprobe(8) AVAILABILITY
The partx command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/. 11 Jan 2007 PARTX(8)
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