Which of the following attribute of file provide access control information.
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- When a user issues the following distinct commands, what happens and why? Assume all files exist. $ PATH=$PATH:~/mybinunix Using one or more of the wild card charaters *, ? and range (also called set) like [abx] and [1-3] in the file pathname, issue appropriate command(s) to do the following. Note: You must show the use of the above three wild card characters individually in one or more commands for part (6) to 11) below. list all files that begin with section using wildcard character List only the files section1, section2, and section3 using wildcard character List the intro files only using a wild card character List the files section1, section3, ref1 and ref3 using set/range Change the permission to all files that begin with section to rwxrw-rw-. Display the file attributes to show that file permissions changed Change working directory to the parent directory using relative path Display pathname of working directory Issue command to delete the directory you created for Q2 without using –r option Using echo command answer whether you are able to delete a non-empty directory Change working…Which filenames would be a subsequent ls command display?$ lsabc abd abe abf abg abh$ rm abc ab*rm: cannot remove ‘abc’ : No such file or directory
- We have a series of folders in the current folder which are named with permission codes (example: 522, 700, 777). I'm looking for a command that allows you to take the permission code from the folder name, and apply it to the folder and all the files it contains. Using "xargs"No written by hand solution Encrypt the plans.txt file using the password pinky and save the output to /opt/book/encryption/secret-key/plans.aes. h. Provide a screenshot of the output in terminal and a screenshot of the contents of the folder opt/book/encryption/secret-key /. Commands to be used: • cd /opt/book/encryption/secret-key • aescrypt -e plans.txt -p pinky -o plans.aes i. Explain what type of encryption aes is, and what is the main difference between aes and RSA encryption algorithmWhen a user issues the following distinct commands, what happens and why? Assume all files exist. $ wc filexx > filexx
- Per guidance from your instructor, in a terminal run the following commands: Check the version of OpenSSL by running: openssl version. Create a text file named txt with any text as its contents. Encrypt this file using AES: openssl enc -aes-256-cbc -salt -in test.txt -out test.enc Encrypt this file using AES and Base64 Encode: Same as above but add –a option and use the output enc file as the input into the decrypt. Why would you Base64 encode a file? Decrypt both of the files. Download or locate 2 image files (shown as pic1.png and pic2.png below). Create MD5 Hash on Pic 1 by running: openssl dgst –md5 pic1.png Create MD5 Hash on Pic 2 by running: openssl dgst –md5 pic2.png What is steganography? How could hashing be used to prevent steganography? Create a password by running: openssl passwd [Your Text Here] Take a screenshot of the demonstration.The command ls -l | wc –l will CHOOSE OPTION: print the full list of users print error print number of files and directories in current directory print the number of user who logon to systemAt the command prompt, type less /etc/passwd and press Enter. Where is the line that describes the root user located in this file?
