Question

1. Set up an easy way to copy files from /home/distribution/cnguyen/cis18b directory on voyager, without having to

type the long path name every time. Make your set up “permanent” for this quarter (the set up should last from one

login session to another).

2. Use echo to write a brief explanation of your set up in step 1.

3. If you are not at your home directory, go to your home directory and

don’t change directory

for the rest of this

module 1 lab. Then create a directory called

lab1-2dir

4. Stay in your home directory, create 3 empty files called

f1

,

f2,

and

f3

in the directory

lab1-2dir

5. Don’t use a text editor, add your user id to file

f1

and add the current calendar month to file

f2

. You should not have

to type in your user id or the current date and time, use the appropriate utility.

6. Use the correct option of the ls utility to show the size in bytes of file

f1

,

f2

and

f3

.

7. Use the set up you created in step 1, copy the file

lab1-2in

from the cis18b directory to your current directory. This

file has the name, high elevation, and low elevation of the biggest cities in the US.

For the next 3 steps, use only the filters that are reviewed in module 1 lecture notes. This means don’t use sed or awk,

there will be plenty of opportunities for sed or awk in the next lab assignment.

8. Show how many cities there are in the file

input

. Use a utility to count the cities, you should not have to count and

type it in yourself. The output should include a text explanation, such as:

Number of big cities: 50

9. Show the city name with the lowest low elevation (show city name only).

10. Show the city name and the high elevation of all cities with a high elevation of 2000 ft or more. The output should

only be the city name and the high elevation, separated by a dash.

[Hint: use a regular expression to look for elevations greater than or equal to 2000, the regex should describe the

elevation as 4 characters]

Answer 1

1.
echo "export CIS18B=~/cnguyen/cis18b" >> ~/.bashrc
echo "cp -rf CIS18B/* ~/voyager" >> ~/.bashrc
source ~/.bashrc
-----------------------------
2.first command will store cp command to ~/bashrc.
source ~/.bashrc will execute .bashrc file.
so that cp command will store in ~/.bashrc file.
so that when you open terminal by default all file will copy to voyager.

3.cd ~/ : go into home directory

4. mkdir lab1-2dir
touch lab1-2dir/f1 lab1-2dir/f2 lab1-2dir/f3 : create files in lab1-2dir

5. cal > lab1-2dir/f1 : print calander into f1
echo "1234 `date`" > lab1-2dir/f2 : print id and date into f2

6. ls -l lab1-2dir/f* : print file details you cab find the size in bytes in 5th column.
7. cp CIS18B/lab1-2in ~/lab1-2dir : copy file from ~/cnguyen/cis18b/ to ~/lab1-2dir
8. No Idea what you learn in class about which type of filter you used.Still according to HomeworkLib rule. I should give upto 4 points anser but i gate 7.