UbuntuServer installation configuration notes

The server‑tuserver and UbuntuDesktop kernels are different. They are specially optimized for the server: the kernel uses Deadine for "input/output scheduling"; the kernel disables Preemption; the kernel clock is interrupted by 100Hz; the kernel is optimized for i686 processors. It better supports virtualization and Multiple Route tables supporting IPv6 protocol. 32-bit supports 64 GB memory and 64-bit unlimited file directory structure directory.

Use Server
Ubuntu Server and Ubuntu Desktop kernel are different. They are specially optimized for the Server:

• The kernel uses Deadine for "input/output scheduling;
• Preemption is disabled in the kernel;
• Kernel clock interruption 100Hz;
• The kernel is optimized for i686 processors;
• Better support for Virtualization
• Supports multiple route tables of the IPv6 protocol;
• 32-bit support for 64 GB memory, 64-bit Unlimited

File directory structure

Directory	English name	Purpose
/	/	The starting point of the entire directory structure. All other files and directories are under this directory.
/Bin	Binaries	Used to store the most common binary commands
/Boot	Boot	Contains important Linux boot files: kernel, grub, etc.
/Dev	Devices	Device directory: hard disk, display, etc.
/Etc	Etc	System configuration file directory
/Home	Home	User directory to store user files and configurations
/Lib	Libraries	System Library File
/Lost + found	Lost + found	Files lost in case of system exception
/Media	Media	Media loading directory
/Mnt	Mount	File System Load directory
/Opt	Optionally	Stores installed programs, optional optionally
/Proc	Processes	Process Information Directory, non-real directory, memory ing
/Root	Root	Root User directory
/Sbin	System-only binaries	Directory for storing system binary commands
/Sys	System	System Information Directory
/Tmp	Temporary files	Temporary File directory
/Usr	User	User applications, library files, and program document storage Directories
/Var	Variable files	Runtime directory, such as running logs and printing queues

Hard Disk partitioning
/Dev/hda first IDE Hard Disk
/Dev/hdb second IDE Hard Disk

/Dev/hda1 first IDE Hard Disk first partition
/Dev/hda2 first IDE Hard Disk second partition

/Dev/sda first SCSI hard disk
/Dev/sdb second SCSI hard disk
/Dev/sda1 first SCSI hard disk first partition

Note: the PATA driver is provided from kernel Kernel2.6.19, regardless of whether the IDE hard disk or SATA hard disk is/dev/sd (x)

Linux partition
Required partition:

/	Root Partition	Mount the root of the entire linux
Swap	Swap Partition	Linux uses it as virtual memory, and the size is 1 ~ of the actual memory ~ 2x

Recommended partition:

/Boot	Pilot Partition	Enhanced stability, with a size of MB
/Home	User Partition	Improve user file security
/Var	Default database and Web storage location	Improve Operation Efficiency and Security
/Tmp	Temporary directory	Improves stability and will be cleared after Ubuntu is restarted.