Shail in Linux


Shail is an interface between user and computer. Shail gives user a platform to write their commands.

Some of the uses of Shail are-

  1. Shail is used as interface between user and kernel (Computer).
  2. Shail is used to execute the command.
  3. Shail is used to write Shail script.

Difference between Shail and Kernel -

Kernel, is like operating system in Linux, every operating system have Kernel.
Shail is command interpreter, which is used to write commands.
Kernal act as interface between hardware and softwares.
Shail act as interface between User and Computer.
Kernel is second layer in Linux system architecture.
Shail is third layer in Linux system architecture.

Different types of Shail are-
  1. Bourne Shail
  2. Bash Shail
  3. C Shail

Bourne Shail
Bash Shail
C Shail
Developed by Stifen Bourne
Developed by Brian Fax.
Developed by Bill Joy.
sh command used for this.
bash command is used for this.
csh command is used for this.
Developed in 1977
Developed in 1987
Developed in 1970

More topics from Linux to read
LINUX covered following topics in these notes.
LINUX solved questions
Python Programming ↓ 👆
Java Programming ↓ 👆
JAVA covered following topics in these notes.
JAVA Programs
Principles of Programming Languages ↓ 👆
Principles of Programming Languages covered following topics in these notes.

Previous years solved papers:
A list of Video lectures References:
  1. Sebesta,”Concept of programming Language”, Pearson Edu 
  2. Louden, “Programming Languages: Principles & Practices” , Cengage Learning 
  3. Tucker, “Programming Languages: Principles and paradigms “, Tata McGraw –Hill. 
  4. E Horowitz, "Programming Languages", 2nd Edition, Addison Wesley

    Computer Organization and Architecture ↓ 👆

    Computer Organization and Architecture covered following topics in these notes.

    1. Structure of desktop computers
    2. Logic gates
    3. Register organization
    4. Bus structure
    5. Addressing modes
    6. Register transfer language
    7. Direct mapping numericals
    8. Register in Assembly Language Programming
    9. Arrays in Assembly Language Programming


    1. William stalling ,“Computer Architecture and Organization” PHI
    2. Morris Mano , “Computer System Organization ”PHI

    Computer Network ↓ 👆
    Computer Network covered following topics in these notes.
    1. Data Link Layer
    2. Framing
    3. Byte count framing method
    4. Flag bytes with byte stuffing framing method
    5. Flag bits with bit stuffing framing method
    6. Physical layer coding violations framing method
    7. Error control in data link layer
    8. Stop and Wait scheme
    9. Sliding Window Protocol
    10. One bit sliding window protocol
    11. A protocol Using Go-Back-N
    12. Selective repeat protocol
    13. Application layer
    1. Andrew S. Tanenbaum, David J. Wetherall, “Computer Networks” Pearson Education.
    2. Douglas E Comer, “Internetworking with TCP/IP Principles, Protocols, And Architecture",Pearson Education
    3. KavehPahlavan, Prashant Krishnamurthy, “Networking Fundamentals”, Wiley Publication.
    4. Ying-Dar Lin, Ren-Hung Hwang, Fred Baker, “Computer Networks: An Open Source Approach”, McGraw Hill.