Lab2 Linux Basics & Symmetric-key Crytography Points: 90 This lab is to configure the prompt of each VM with a new hostname and practice basic Linux commands and symmetric- key encryption and decryption. All the data needed for this lab is uploaded to the Dropbox as a ciphertext using AES. You need to decrypt the file to get the data. The key and IV used in the encryption of the data can be found in Step 2 of Task4. Task 1: Configuring the prompt For each VM, add the hostname to the prompt by following Slide 2-3 of Lecture2: Linux Basics. a. Attach three screenshots of prompts of three VMs. (5pts) Task 2: Basic commands of Linux a. Add a new user named alexa. Find the ID of alexa using grep command and attach a screenshot. (5pts) b. Login with the new user's ID using "su alexa" c. Create a directory named Test and set its permission so that others can od to the directory but not read or write in the directory. Test if your permission setting is correct by logging in as seed. Add a screenshot of permission change and test the permission setting. (5pts) d. Create a file named hello under Test. What is the octal value of the permission of the file? What is the value of the umask? (5pts) e. Change the permission of hello so that the owner can read/write, the group read/write and others no permission and show the permission after the change. After the change, what will be displayed in the first nine columns of the command, "Is-al hello"? ( 5pts) f. Now, move to the home directory of alexa. What will be the simplest command to do so? (5pts) g. Confirm where you are in the file system. What will be the command to check that? (5pts) h. Use "rm Test" to delete the directory. Were you able to delete the directory? If not, What is the reason? ( 5pts) i. What command must be used to get Step 8 successfully done? (5pts) j. Do not exit in order to continue the next task