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Linuxzoo net

17/12/2020 Client: saad24vbs Deadline: 7 Days

1/19/2020 Tutorial 4


https://linuxzoo.net/page/sec_tut4.html 1/3


Refresh in: 0:06. Time left: Holding


Minimize User: Paul John (tbc) rahul11mittal1994@gmail.com Account expires in 10 days


Log off Account Links Machine State: RUN Boot progress: complete


control connect stats useful


Home IP: 182.69.138.250 VM IP: 10.0.2.65 Direct: telnet or ssh to linuxzoo.net SSH: linuxzoo.net VM Web: http://host-2-65.linuxzoo.net/ JScript Telnet: Network / Console Java Telnet: Auto JavaScript SSH: SSH JavaScript VNC: VNC URI telnet: linuxzoo.net Connect: Username: root, Password:


secure


prev section up prev page next page


Tutorial 4 Welcome to linuxzoo


Essential Linux Unix Security


Tutorial 4


Permissions


Permissions.


To reset all the check buttons from a previous attempt click here


Question 1: Update demo account If you have just completed all the previous tutorials you need not use this setup button. However, if you have skipped part or all of the previous tutorial questions, or when you ran your virtual machine the demo account was missing, then the button below will create the demo account and create the files which the previous tutorials would have had you create.


By pressing the button below a new account is created called "demo", password is also "demo". Log in using this account and you cannot do any damage. If you mess the account up and want to start again, just press the button again.


Once created, you can log into this account using telnet or ssh, logging into the hostname linuxzoo.net. Remember the username is demo and the password is demo. And remember, you cannot break anything using this account! The account begins with an empty directory, so dont be shocked that "ls" shows nothing...


Update account Tests: Complete Update an account called demo, password demo PASSED


Question 2: Octal Code What is the octal value for the permissions on /home/demo/bigfile?


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telnet://linuxzoo.net

https://linuxzoo.net/page/sec_umask.html

https://linuxzoo.net/page/sec.html

https://linuxzoo.net/page/sec_umask.html

https://linuxzoo.net/page/manipulate.html

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https://linuxzoo.net/page/intro.html

https://linuxzoo.net/page/sec.html

1/19/2020 Tutorial 4


https://linuxzoo.net/page/sec_tut4.html 2/3


Enter the octal value:


Check octal Tests: Complete Octal value of /home/demo/bigfile PASSED


Question 3: Other Permissions What is the "other" permissions on /home/demo/bigfile?


Only Read


Check Other Tests: Complete Octal value of /home/demo/bigfile PASSED


Question 4: Remove read and execute Take away from the scripts directory read and execute (search) permission for yourself ONLY.


Check Tests: Complete scripts has no self read/execute FAILED


Question 5: Impact of no rx What did removing read and execute do to you ability to look into scripts?


Could not ls the directory


Check Answer Tests: Complete Effect of no read or execute PASSED


Question 6: Add read Add in read access for yourself on the scripts directory.


Check Tests: Complete scripts has no self read/execute FAILED


Question 7: Impact of no x What did restoring read access do to you ability to look into scripts?


Could ls, but not access contents


Check Answer Tests: Complete Effect of no read PASSED


Question 8: Add execute


644


1/19/2020 Tutorial 4


https://linuxzoo.net/page/sec_tut4.html 3/3


Restore the directory scripts to read,write,execute for the owner, and read and execute for both others and group.


Check Tests: Complete restore scripts PASSED


Question 9: umask What umask setting would be required to give, when creating a directory, read/write/execute for yourself, read and execute for group, but only execute for others?


Octal value:


Check Answer Tests: Complete Octal value needed FAILED


Centos 7 intro:


Paths | BasicShell | Search


Linux tutorials: intro1 intro2 wildcard permission pipe vi essential admin net SELinux1 SELinux2 fwall DNS diag Apache1 Apache2 log Mail


Caine 10.0: Essentials | Basic | Search | Acquisition | SysIntro | grep | MBR | GPT | FAT | NTFS | FRMeta | FRTools | Browser | Mock Exam |


CPD: Cygwin | Paths | Files and head/tail | Find and regex | Sort | Log Analysis Kali: 1a | 1b | 1c | 2 | 3 | 4a | 4b | 5 | 6 | 7a | 8a | 8b | 9 | 10 | Useful: Quiz | Forums | Privacy Policy | Terms and Conditions Site Links: XMLZoo ActiveSQL ProgZoo SQLZoo


Linuxzoo created by Gordon Russell. @ Copyright 2004-2018 Edinburgh Napier University


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