Tim Hieu File Linux

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Click to edit Master subtitlestyle

OVERVIEW OFFILESYSTEMMANAGEMENT IN LINUX

Lecturer:MS. V Minh Sn

Students:Nguyn c Tin 0620076Nguyn Xun Thun 0620069


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Filesystem management in Linux

CONTENTS

filesystem management in Linux22

Demo

4

Exploring the Linux filesystem1

File permissions

2

File processing

3

5

Q & A 6

Examining Files


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1.1 Exploring the Linux

filesystem1.1 Overview

1.2 Filesystem hierarchy

1.3 Type of information

1.4 Linux device files

1.5 Mounting and unmounting a device onthe

filesystem filesystem management in Linux33


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1.1 Overview (cont)



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1.1 Overview (cont)

l File properties (Administrativeinformation)

66 Filesystem management in Linux

l Namel Locationl Sizel Owner/Groupl Type

l Data created/accessed/modified

l Permissionsl Desktopl Command line

files inodel File manager KDE Konqueror(Windows Explorer) GNOME Nautilus


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1.2 Filesystem hierarchy

77 filesystem management in Linux



1.1 Understanding the

filesystem hierarchy (cont)




1.2 Filesystem hierarchy (cont)

l path (pathname) absolute name vs relative name

/home/nguyenxuanthuan/programs /home/guest/programsl shorcut

. current directory .. directory immediately above the

current directory

Filesystem management in Linux99


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1.3 Type of information


Data files

Link files

Directory files

Configuration files

Device files

Type ofinformation

Application-specific fileso Program

Applicationso Image files

Text files


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1.4 Linux device files



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1.4 Linux device files (cont)

l Linux treats all devices as files and usesa device just as it uses a file


Open file Write fileRead fileClose file

l Device Driver : a special program thatcontrols a particular type of hardware

l Any application can access a device byopening the file specific to that device


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1.4 Linux device files (cont)

l Device file : the file which applications useto access a device

These special appear in the /dev directory in theLinux filesystem block devices b

character devices c

network devices eth x/ppp x(x = 0, 1, ...)



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1.5 Mounting and unmounting a

device on the filesysteml Each of storage device has own filesystem

when you want to add a new storage device, you need toformat it as a filesystem and then attach it to your Linux filestructure

l Mounting is the operation you perform tocause the filesystem on a physical storagedevice to appear as part of the Linuxfilesystem

l Mounting point is a specified directory thatcontains the mount command to mount a

device on the Linux filesystemFilesystem management in Linux1414


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Filesystem management in Linuxfilesystem management in Linux1515

Mounting adevice on

thefilesystem


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How to name a storage in Linux


l Example fd 0: the first floppy drive attached to your system sd a 2: the second partition on the first SCSI hard drive

hd IDE hard drive1 4 are primary partitions5 and up are logical partitions

sd SCSI hard drives

fd Floppy diskslp Printer portscdrom Links to your CD-ROM device file


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2. Examining Files

File information

GUI: right-click the file icon andselect properties .

Command line: ls options: -l, -a operators: >,>> pwd



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Filesystem management in LinuxFilesystem management in Linux1818


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3. File Permissions

l Three types of user accounts O w n e r The account that owns the file G r o u p Members of a group that owns the file

A l l u s e r s All accounts on the systeml Do one or more of three things tothe file

R e a d ( r ) Look at the contents of the file Wr i t e ( w ) Save the file to the hard disk E x e c u t e ( x ) Run the file or enter the directory

l Example: drwxr-xr--



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3. File Permissions (cont)

Format:chmod who action permission filename

Example: chmod u+x nguyen.txtFilesystem management in Linux


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4. File processing

4.1 Finding file

4.2 Creating Directories, Files, and Links

4.3 Copying, Renaming, and Moving Files

4.4 Viewing and Editing Text Files

4.5 Deleting Files and Directories4.6 Backup and restoring files

http://var/www/apps/conversion/current/tmp/scratch16264/slide33.xml


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4.1 Fin ding file

l Use: find command to find files by filename or

prop erties and grep command to find files by content

http://var/www/apps/conversion/current/tmp/scratch16264/slide33.xmlhttp://var/www/apps/conversion/current/tmp/scratch16264/slide33.xmlhttp://var/www/apps/conversion/current/tmp/scratch16264/slide33.xmlhttp://var/www/apps/conversion/current/tmp/scratch16264/slide33.xmlhttp://var/www/apps/conversion/current/tmp/scratch16264/slide33.xmlhttp://var/www/apps/conversion/current/tmp/scratch16264/slide33.xmlhttp://var/www/apps/conversion/current/tmp/scratch16264/slide33.xmlhttp://var/www/apps/conversion/current/tmp/scratch16264/slide33.xmlhttp://var/www/apps/conversion/current/tmp/scratch16264/slide33.xmlhttp://var/www/apps/conversion/current/tmp/scratch16264/slide33.xmlhttp://var/www/apps/conversion/current/tmp/scratch16264/slide32.xml


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4.1.1 Find command

find pathname conditions



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4.1.2 Grep command

grep options pattern files



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4.2 Creating Directories, Files, andLinks

v To create a directory in any directory whereyou have write permission, use the mkdir command:

mkdir path/dirname v If path includes directories don't yet exist,

you can create them in one command withthe -p option :

mkdir -p /usr/local/newparent/mydir



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4.2 Creating Directories, Files, andLinks (cont)

l Files can be created by applications, such asa word processor, and cat command.

l

Links can be created at the command lineusing the ln command



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4.3 Copying, Renaming, andMoving Files

v To copy or move a file, type:+ cp path/sourcename path/targetname

(copies a file)+ cp -r path/sourcename pa th/targetname(copies a directory)

+ mv path/sourcename path/targetname (moves a file or directory)v Your account needs to have write permissions



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4.4 Viewing and Edi ting Text Files

l Applications: Kate, Kwrite, l Command lines:

cat filename: The entire file contents displayon the screen at once

less filename: display the contents one screenat a time

vi filename: edit file

http://var/www/apps/conversion/current/tmp/scratch16264/slide38.xmlhttp://var/www/apps/conversion/current/tmp/scratch16264/slide38.xml


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Vi options



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Vi options (cont)



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Vi options (cont)



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ZZ: save file:q!: close without saving file

Vi options (cont)



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4.5 Deleting Files and Directories

l rm filename: delete a filel rm *: delete all file in current directory

l rmdir dirname: remove a empty directoryl rm -r dirname: remove a directoryl Must have write permissions on the directory

containing the files



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4.6 Backup and Restoring files

l +which files needing to backup

+how often+what back up storage touse


Back up strategyBack up media

l tap archiver command (tar)l Format: tar options tarfile filelist


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Tar options



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Tar options (cont)



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Tar options (cont)



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Tar options (cont)



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5. DEMO

l VMWare Workstation Version 6.0.0 build-45731

l

Linux OS Distribution Tinycorel Demo



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Reference

1. Spring into Linux (AW), 20052. Linux All-In-One Desk Reference For

Dummies 2e (Wiley, 2006)3. Beginning Linux Programming 4e(Wrox, 2007)

4. Linux: The Complete Reference, SixthEdition

5. www.tinycore.com



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6. Q&A

Thank You !

Tim Hieu File Linux

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