Which symbol is used to take input from the standard input?

Which of the following is not a special parameter used by the shell?

Which of the following symbols are used in a relative pathname?

Which Linux command is used to start or activate a network interface?

Which of the following symbols are used for matching multiple patterns?

To view the kernel messages for an application you created in Linux, which command should you use?

To move two levels up in the file hierarchy system using the cd command, which symbol is used to separate the two periods (..)?

How to identify executables and directories from the output of the ls command?

Which command will search for the word 'director' in the file 'emp.lst'?

If rmdir dir01 fails, what could be the reason(s)?