Linux Operation

For the following exercises, ensure the following regarding the student1 and student2 accounts:

• The home directories are /home/student1 and /home/student2
• The student accounts are in the students group
• The umask for the student1 and student2 accounts is: 022, (should be by default)
• The “student” account home directories have 755 permissions.
• Execute steps in the “Lab 2 setup supplement” document on D2L to get the above set up.

Also note that, the term “home directory” below, if not specified in detail, refers to the home directory of the current user (e.g. /home/student1 for the student1 account). This does not specify just the “/home” directory.

*** On the lab answers – be sure you use the form fields, so that your answers are show in red ***

SECTION 1 – Absolute/Relative Paths, Files and Directories:

1. Log into the student1 account. Enter the command to tell you what your current directory is:

     .

Now cd to the /tmp directory. Enter two commands, which will change your directory to the home directory for student1:

      and      

Verify these two commands work by displaying your current directory after each one is run.

2. Ensure you are in your home directory for student1. List the contents of the /tmp directory using an absolute path name:      .

List the contents of the /tmp directory using a relative path name:      .

After listing the contents of a directory, does your present working directory change?      .

What command changes your present working directory?      .

3. Ensure you are in your home directory for student1. Change your current directory to the root (/) directory. What command did you use:      .
4. Enter the cd ~ command. What directory are you now in?         .

Explain what “~” represents:      .

5. Ensure you are in your home directory for student1. Create a file called labfile1 with the touch command in the /tmp directory using a relative path name. What command did you use:

     .

Create another file called labfile2 with the touch command in the /tmp directory using an absolute path name. What command did you use:        .

6. What is the file size of files created with the touch command?        .

Now touch one of these files again. What, if anything is different in the file’s characteristics?        .

7. Ensure you are in your home directory for student1. Using the echo command with output redirection, and an absolute path, add 10 lines to the /tmp/labfile1 file. Make each line just one word - line1, line2, through line10. What is the new file size of the /tmp/labfile1 file?      .

In what storage units are files displayed in unix?        .

Ensure you are in your home directory for student1. Use the tail command and a relative path to display the last 5 lines of the /etc/passwd file. What command did you use:        .

Ensure you are in your home directory for student1. Use the head command and an absolute path to display the first 5 lines of the /etc/group file. What command did you use:        .

8. Ensure you are in your home directory for student1. Create a new subdirectory in your home directory called subdir1. What command did you use:        .

Change your current directory to the subdir1 directory using a relative pathname. What command did you use:      .

Change back to your home directory for student1. Create a file called labfile3 in this subdir1 directory using the touch command with a relative pathname. What command did you use:

     .

9. Ensure you are in your home directory for student1. Execute the following commands: ls –al subdir1 and ls –ald subdir1. What is the difference between these 2 commands?

     .

How is the current American health care system failing patients? How is it failing providers and organizations? Do you believe that health is a right or a privilege?  Do you believe that everyone in America should be insured through a single-payer system? Why or why not? Should there be limitations to these coverages? If so, who should have input to determine the limitations?  

1. Give a 90% confidence interval, for μ1−μ2μ1-μ2 given the following information.

n1=45, ¯x1=2.97, s1=0.88
n2=20, ¯x2=3.44, s2=0.83

........ ± ........ Rounded to 2 decimal places.

2. A travel magazine conducts an annual survey where readers rate their favorite cruise ship. Ships are rated on a 10 point scale, with higher values indicating better service. A sample of 30 ships that carry fewer than 500 passengers resulted in an average rating of 8.97 with standard deviation of 0.98. A sample of 35 ships that carry more than 500 passengers resulted in an average rating of 9.13 with a standard deviation of 0.6.

Give a 95% confidence interval of the difference between the population mean ratings for smaller ships and the population mean ratings for larger ships. (Note, the order of subtraction matters...look at the wording carefully.)

...................... ±................... Rounded to 2 decimal places.

There has been an annual 3.1% prevalence of Zika virus in South American countries since 1947. Only 1% of all cases resulted in any DALY count (all cases, any year). In 2015, clinicians observed increased microcephaly among children born to women who had been ill from Zika within the last 12 months. A new screening test was developed with more sensitivity to understand the rate ofZika among women ages 20-35 in three South American countries. It can detect Zika in women within a year of exposure. The results showed: 25% in Brazil, 20% in Peru, & 15% in Mexico. Write response in paragraph form.

Who is being tested? Why?

Is this rate an incidence or prevalence?

What would you say these rates tell us about the spread of Zika?

What secondary prevention would you implement in the US based on this finding?

Prepare a brief (maximum 350) report that examines whether, how, and why strategic management is/could/should be relevant and important. use examples from the Department of corrections to offer a credible analysis. Decide what strategic management elements to include in the reports (e.g. Vision/Mission, situational analysis, external view, internal view, core values, strategy, leadership, etc.)

United States of America Prison

1. Compare the Unix directory and the windows directory and answer the following:

a. Match 3 Unix directories to a Windows directory that is similar in function. Briefly describe their similarities and differences.

b. Find a directory in Unix that appears to have no equivalent in Windows. What does it do?

c. Find a directory in Windows that appears to have no equivalent in Unix. What does it do?