Ina circle with centre O, AD is a diameter and AC is a

How do you check the exit status of the last executed command in a shell?

How can you make a shell script executable?

Which command is used to make a shell script executable?

How do you access the value of a variable named `USERNAME` in a shell script?

What does the exit command do in a shell script?

In shell scripting, which symbol represents all files in the current directory?

Which symbol is used to make a script executable in Linux?

Metadata in a data warehouse primarily describes:

Named pipes (FIFOs) are created using:

Which command is used to display the current working directory?