Use array to write a shell script to print out the information about the files and directories in the current directory according to the following sample run.
>>>>> ls
compute print repeat
>>>>> compute
practice: shell command and array
list all directories and files in current directory: compute print repeat
total number of files and directories: 3 the first element in this list: compute all elements in this list:
compute print repeat >>>>>
Part II (choice A)
Two files courses and emails are given where columns are separated by tabs.
courses:
| 101 | 60212 90 |
| 101 | 60256 81 |
| 102 | 60231 70 |
| 102 | 60212 85 |
| 103 | 60256 n/a |
emails:
Write a bash script to find the emails of all students taking a specific course, which is given as a command line argument.
Hints: use grep command for the search, and use array to store intermediate data.
Sample output:
>>>>> mysolution
usage: mysolution course-number >>>>> mysolution 60200 course number 60200 not found
>>>>> mysolution 60256
Part II (choice B)
Two files 60-256 and 60-212 are given. Each contains two columns for student ids and the marks. Columns are separated by tabs. Write a bash script to print out all the ids of the students who passed both 60-256 and 60-212.
Part III (optional)
In the current directory, there are several files starting with 60-. The total number of such files could be changed, and the names of these files are not known. Each file contains two columns: student ids and the marks. Columns are separated by tabs. Write a bash script to print out all the ids of the students who passed all the courses.
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