This quiz is part of the DevOpsTheHardWay course.

Bash - command techniques - multichoice questions

Question 1

After running a command line from an interactive bash prompt, the following messages are displayed:

bash: timelog: Permission denied
timestamp failed

Which of the following command lines could have produced the messages?

• date >> timelog || echo timestamp failed
• date >> timelog && echo timestamp failed
• date >> timelog ; echo timestamp failed
• A and C
• All of the above

Question 2

Which of the following would run the chmod command only if the mkdir command succeeds?

• mkdir mail || chmod 700 mail
• mkdir mail && chmod 700 mail
• mkdir mail ; chmod 700 mail
• mkdir mail | chmod 700 mail
• None of the above

Question 3

Which of the following would run the chmod command only if the mkdir command fails?

• mkdir mail | chmod 700 mail
• mkdir mail && chmod 700 mail
• mkdir mail ; chmod 700 mail
• mkdir mail or chmod 700 mail
• None of the above

Question 4

Which of the following would run the chmod command regardless of the success or failure of the mkdir command?

• mkdir mail | chmod 700 mail
• mkdir mail && chmod 700 mail
• mkdir mail ; chmod 700 mail
• A and C
• None of the above

Question 5

When the user plato runs the following command, what is the name of the file that is written to?

cal > calendar.$(id -un).txt`

• calendar.txt
• calendar.pluto.txt
• calendar.id-un.txt
• calendar.512.txt
• None of the above

Question 6

Which operator tells the shell to run a given command in the background?

• !
• &&
• &
• $