- Take me to Practice Test
Solutions to practice test - variables
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Check the answer file at /tmp/assets/create-and-launch-rocket-answer
bob@caleston-lp10:~$ cat create-and-launch-rocket mission_name=lunar-mission mkdir $mission_name rocket-add $mission_name rocket-start-power $mission_name rocket-internal-power $mission_name rocket-start-sequence $mission_name rocket-start-engine $mission_name rocket-lift-off $mission_name rocket-status $mission_name$ bash create-and-launch-rocket -
Variable name must be in the same case as defined $user_name
bob@caleston-lp10:~$ cat print-welcome-message.sh user_name=Michael echo "Hi $user_name, Welcome to xFusionCorp Industries. Weand the rest of the management are glad to have you on board" -
Variable name should not have a dashes. Correct it.
bob@caleston-lp10:~$ cat print-uptime.sh uptime=$(uptime) echo "The uptime of the system is $uptime" -
Variable should be encapsulated in { }. Change variable to ${file_name}_bkp
bob@caleston-lp10:~$ cat backup-file.sh # This script creates a backup of a given file by creatinga copy as bkp# For example some-file is backed up as some-file_bkp file_name="create-and-launch-rocket" cp $file_name ${file_name}_bkp -
Make sure that the variable names that are defined are actually the ones being used in the script.
bob@caleston-lp10:~$ cat create_files.sh FILE01="Japan"FILE02="South Korea" FILEO3="Canada" cd /home/bob echo "Creating file called $FILE01" touch $FILE01 echo "Creating file called $FILE02"touch $FILE02 echo "Creating file called $FILE03" touch $FILE02 -
This script uses an environment variable. If unclear, check out the Bash section in the Linux Basics Course