should answer by Linux , Unix

I'll upvote

(4 x 1 Part 2: Open Questions points) 1. Write a command that searches into a text file called (dictionary.txt) for all the lines that contain the string "arra" 2. Write a command that searches into a text file called (dictionary.txt) for all the lines that contain the string "ar" followed by any string followed by "ent". For example, the word "arrangement" should be included in the result. 3. Write a command that searches into a text file called (dictionary.txt) for all the lines containing the string "ont" and saves the result into a file named "ont_words.txt" 4. Write a command in one line that searches into a text file called (dictionary.txt) for all the lines containing the string "irr" followed by an "a" character or an "e" character, saves the result into a file named "irr_words.txt" and opens the result using the less command