Linux Administration

Harddisk : It is a storage device which is used to store any kind of data, Currently there are two types of HDD available in market: SATA (Serial Advanced Technology Attachment). PATA (Parallel Advanced Technology Attachment). So the basic command to check your file system structure is fdisk -l, it will show you list of your harddisk's partition table. For more information on this you can see its man page by firing a command as man fdisk. Usually when a hard disk is inserted in a machine it acts like a file and is stored in /dev partition. So suppose that there are 3 hard disk in your machine then there naming convention would be /dev/sda (for the first HDD), /dev/sdb (for the second HDD), /dev/sdc (for the third HDD). parted : Stands for GNU Parted - a partition manipulation program, it is  a  disk  partitioning  and  partition resizing program.  It allows you to create, destroy, resize, move and copy ext2,  linux-swap,FAT,  FAT32,...

LVM is a logical volume manager for the Linux kernel, it manages disk drives and similar mass-storage devices. The term "volume" refers to a disk drive or partitions. LVM is suitable for: Managing large hard disk farms by letting you add disks, replace disks, copy and share contents from one disk to another without disrupting service (hot swapping). On small systems (like a desktop at home), instead of having to estimate at installation time how big a partition might need to be in the future, LVM allows you to resize your disk partitions easily as needed. Making backups by taking "snapshots." Creating single logical volumes of multiple physical volumes or entire hard disks, allowing for dynamic volume resizing. One can think of LVM as a thin software layer on top of the hard disks and partitions, which creates an illusion of continuity and ease-of-use for managing hard-drive replacement, repartitioning, and backup. Features of LVM: Resize ...