The contest consists of 10 tasks, each of which costs 10 points when the assignment is completed correctly and meets all the requirements.
The maximum score for all the assignments is 100.
The task 1
Create a file of the following specific format:
YYYY-DD-MM hh:mm 1 12 123 1234 12345 123456 …. 123456789101112131415 ….
where YYYY-MM-DD is current date and hh:mm – current time
Then there are lines with numbers from 1 to N, where N is passed as an argument
Input format
ARG1 – path to the output file
ARG2 – N
Output format
The format was described above.
Example of usage
./script.sh /tmp/results.txt 15
The task 2
A directory containing a certain number of files with different extensions is given. Create a file with contents of the following format:
| Path_to_dir filename_without_extension extension./tmp/mydir file txt ./tmp/mydir file csv ./tmp/mydir file24 jpeg ./tmp/mydir myvideo avi ./tmp/mydir/dir2 file txt ./tmp/mydir/dir2 photo15 jpeg |
Input format
ARG1 – path to the input directory
ARG2 – path to the output file
Output format
Each file is presented as a separate line of a certain format
Path_to_directory filename_without_extension extension
Example of usage
/script.sh /tmp/mydir /tmp/results.txt
The task 3
A template file is provided. Create a file from the template, replacing all service combinations with the actual data. {{1}} must be replaced with an argument passed immediately after the name of the resulting file. {{2}} must be replaced with the next parameter and so on. In total, the script should process a maximum of {{9}}
Input format
ARG1 – path to the template
ARG2 – path to the output file
ARG3 – the argument to which all occurrences of the symbol group {{1}} should be replaced by the symbols provided in the ARG4 {{2}}
ARG4 -a group of symbols for replacing by
A maximum of up to {{9}} parameters can be passed to the script
Output format
The result of the work must be saved in a separate file
Example of usage
./script.sh /tmp/source.txt /tmp/results.txt Chris US Cupertino, где
{{1}} = Chris
{{2}} = US
{{3}} = Cupertino
The task 4
Calculate the integral (x * x * x-2x + 1) dx in the section from A to B with step H by the trapezium method with an accuracy of 10 ^ (-5). The result is displayed on the screen.
Input format
ARG1 – start of the segment (A)
ARG2 – end of the segment (B)
ARG3 – step (H)
Output format
Calculated value of the integral.
Example of output: 0.552323
Example of usage
./script.sh -5 5 0.1
The task 5
Print a file with numerical sequence of prime numbers.
Input format
ARG1 -a number of natural numbers starting from one
ARG2 – path to the output file
Output format
Each line contains one number in ascending order
Example of usage
./script.sh 5 /tmp/results.txt
The task 6
Analyze the text contained in the file with the original data. Display the file on the screen, highlighting all words containing a specific letter.
| Symbols | Backlight color |
| A a O o | Red |
| Y y W w | Green |
| H h D d | Yellow |
| U u | Blue |
Input format
ARG1 – path to the input file
Output format
Text on the screen where individual words are highlighted in a specific color
Example of usage
./script.sh /tmp/source.txt
The task 7
A directory containing specific files and directories is given. It is required to find and delete files that match all the criteria at once:
- Owned by user USER
- File larger than SIZE bytes
- Text file (extension .txt)
- File containing at least one mention of the months of the year (January, February, etc)
Input format
ARG1 – the input directory
ARG2 – name of the user
ARG3 – size of the file
Output format
All files from the input directory that match all criteria are listed.
Example of usage
./script.sh /tmp/mydir user15 10240
The task 8
A directory with a certain set of files in the format NNN.jpg, where N is a digit from 0 to 9 is provided. It is required to rename the files in the format “photo-MMM.jpg”, where MMM is the sequential number of the photo. The ordinal names of MMM are running in a row without “empty spaces”. If the number is less than 100, then you need to add leading zeros.
Input format
ARG1 – the subdirectory with data
Output format
Given the files 015.jpg, 055.jpg, 998.jpg and 998.jpg as an example, the script should rename them as shown below:
015.jpg – > 001.jpg
055.jpg – > 002.jpg
998.jpg – > 003.jpg
999.jpg – > 004.jpg
Example of usage
./script.sh /tmp/source.dir
The task 9
Find in a given text file all references to the correct date (including analysis for correctness on February 29 and so on) in YYYY-MM-DD format. Output the results in a separate file.
Input format
ARG1 – name of the input file
ARG2 – name of the output file
Output format
Each found sample of the correct date must be saved as a new line in the resulting file
Example of usage
./script.sh /tmp/source.txt /tmp/results.txt
The task 10
Decrypt an encrypted file. Save the result to a separate file. The encryption algorithm is described below.
All characters are left unchanged, except for the ones listed below.
| A letter | Replaced by |
| A | B |
| B | A |
| a | c |
| c | a |
Input format
ARG1 – path to the encrypted file (input)
ARG2 – path to the decrypted file (output)
Output format
Text file with reverse character substitution.
Example of usage
./script.sh /tmp/source.txt /tmp/results.txt