Create a text file consisting of 30 lines and display the first 5 and last 5 lines of this file. Count the number of times the word “has” appeared in this file. Display the file permissions of the file created by you and change its permissions to rwx------.

To perform these tasks, you can use the following Linux commands:

1. Create a text file with 30 lines:

   ```bash

   echo -e "Line 1\nLine 2\n...\nLine 30" > mytextfile.txt

   ```

2. Display the first 5 and last 5 lines:

   ```bash

   echo "Displaying first 5 lines:"

   head -n 5 mytextfile.txt

   echo -e "\nDisplaying last 5 lines:"

   tail -n 5 mytextfile.txt

   ```

3. Count the number of times the word "has" appears:

   ```bash

   grep -o -i "has" mytextfile.txt | wc -l

   ```

4. Display file permissions:

   ```bash

   ls -l mytextfile.txt

   ```

5. Change file permissions to rwx------:

   ```bash

   chmod 700 mytextfile.txt

   ```

Make sure to replace "mytextfile.txt" with the actual name of your text file.

These commands create a text file, display its content, count occurrences of the word "has," display file permissions, and then change the permissions to rwx------. Adjust the file name accordingly.