LINUX FILE SYSTEM HIERARCHY STANDARD(FHS)

/:-

  • This directory is called as the root directory.
  • It is at the top of the file system structure.
  • All other directories are placed under it.

/root:-

  • This is the default home directory of the root.
  • In Linux/Unix the administrator is called as root.
  • Administrative privilege is represented by "#".

/home:-

  • It contains the home directories of all users (similar to Documents & Settings folder in windows)
  • When any user logs in the current working directory by default is the users home directory.
  • Eg: user1--> local user, Login--> $/home/user1, $ represents local user.

/boot:-

  • It contains the kernel, which is the core of the operating system.
  • It also contains the files related for booting the operating system such as boot loader.
  • Eg: kernel-->vmlinuz(name of the kernel), Default boot loader file "grub.conf".

/usr:-

  • Usr stands Unix System Resource.
  • It contains the programs and applications which are available for users(similar to program file in windows)

/opt:-

  • Opt stands for Optional
  • It generally contains the third party software,eg: open office, kaspersky antivirus etc.,

/sbin:-

  •  Sbin stands for system binary
  • It contains essential system commands which can only be used by the superuser(root) .
  • Eg: fdisk, dump, etc,, useradd, userdel, groupadd

/bin:-

  • bin stands for binary
  • It contains essential commands which are used by all users.
  • Eg; ping, cat, chomod, etc, cp mkdir, rm , mv touch.

/etc:-

  • etc stands for etcetera
  • contains all the configuration files.
  • Eg: /etc/passwd--> userdatabase file, /etc/group-->groupdatabase file.

/var:-

  • var stands for variable.
  • It contains variable information, such as logs and print queues.
  • Eg: default user mail box location  --> /var/spool/mail

/dev:-

  • dev stands for device.
  • It contains information about all hardware devices.
  • Eg: SATA  /dev/sda-primary master--IDE-hda






Comments

Post a Comment

Popular posts from this blog

Reasoning-Number Series

Complete the following series 225,224,____,222,221 a)220         b)223         c)219           d)226 Answer: b)      2. 17,19,23,29,31,37,______     a)41               b)43         c)40           d)42    Answer: If you look at the above series they are all prime numbers, next series will be 41        3.225,196,169,____,121,100,81     a)156              b)144         c)136           d)125 Answer: above series can be written as 15^2,14^2,13^2,____,11^2,10^2,9^2. The missing series is 12^2=144.     4.12,14,15,16,18,20     a)22              b)25         c)21       ...
Read more

Reasoning-Letter Series

Question & Answers 46. abc-a--d-bcdabcd (1)d b b a        (2)d c a a        (3)a b c d     (4)d b c a 47.b-da-cda-c-abc (1)a a b b        (2)d b c a        (3)a d b c     (4)c b b d 48. a a a b -b c - - a a - (1)a b b c        (2)a c b c        (3)b a c a     (4)b c c a 49. -b a b - b c b c - c a - a b (1)a b c c         (2)a b c b        (3)a c a c     (4)a a c b 50.a b c - - c b a a - c d d c - a (1)d b d b        (2)d d b b         (3)b c a d     (4)a d b c 51.E, A _, O, I (1)E        (2)U        (3)X     (4)V 52.D , F ,G, H , J ,K , L, M , N __ (1)O        (2)Q        (3)P     (4)R 53.E, J, O , T, Y, ____ (1)D...
Read more

Profit and Loss

Cost Price (C.P.) The price at which an article is purchased or manufactured is called its cost price. Selling Price (S.P.) The price at which an article is sold, is called its selling price. Profit If the selling price of an article is greater than its cost price, we say that there is a profit or gain. Profit = Selling Price - Cost Price When S.P.>C.P. Profit = S.P. - C.P. S.P.= C.P.+Profit C.P.=S.P.-Profit Profit % = Profit/C.P. * 100 Profit = Profit % * C.P. When C.P.  and Profit% are given then, S.P. = C.P. * ((100+Profit %)/100) When S.P. and Profit % are given then C.P.= 100* S.P./100+ Profit % Loss If the selling price of an article is less than tits cost price, we say that there is a loss. Loss = Cost Price - Selling Price  When C.P.>S.P. Loss = C.P. - S.P. S.P.= C.P.-Loss C.P.=S.P.+Loss Loss % = Loss/C.P. * 100 Loss = Loss % * C.P. When C.P.  and Loss % are given then, S.P. = C.P. * ((100-Loss %)/100) When ...
Read more