Bash Shell Scripting- Command Chaining using Logical AND (&&) and Logical OR (||) Operators

This video tutorial explains the use of command chaining operators in shell scripting. It covers the semicolon operator for independent command execution, the logical AND operator for conditional execution based on success, and the logical OR operator for execution based on failure. The tutorial also demonstrates combining logical AND and OR operators for efficient scripting.

What is the primary purpose of command chaining operators in shell scripting?

• To debug shell scripts

• To execute commands in parallel

• To combine multiple commands into a single line

• To increase the execution speed of commands

What is the exit status of a command that executes successfully?

• 0

• 255

• 1

• -1

How does the semicolon (;) operator affect the execution of commands?

• It stops execution after the first command

• It executes commands only if the previous command is successful

• It executes commands only if the previous command fails

• It executes commands independently of each other

What happens when you use the logical AND (&&) operator between two commands?

• The second command executes only if the first command fails

• The first command is skipped

• The second command executes only if the first command is successful

• Both commands execute simultaneously

In a command sequence using logical AND (&&), what happens if the first command fails?

• The first command is retried

• The second command executes

• The second command is skipped

• The script terminates

Which operator would you use to execute a command only if the previous command fails?

• Semicolon (;)

• Logical AND (&&)

• Logical OR (||)

• Pipeline (|)

How can you combine logical AND and OR operators to check if a command is installed?

• Use AND to check installation and OR to display a message if not installed

• Use neither AND nor OR for installation checks

• Use OR to check installation and AND to display a message if not installed

• Use both AND and OR to execute commands in parallel