This is Linux...

Exercise - Exercise 1: Use vi to create a file with name "table1.txt" with following content. Exercise Exercise 2: Use redirect method to create a file with name "table2.txt" with following content. Exercise - Exercise 3: Append "table1.txt" and "table2.txt", and redirect to "table3.txt". - Exercise 4: sort "table3.txt", and redirect the result to file "table4.txt" Exercise - Exercise 5: replace "apple" to "pear" in "table1.txt". - Exercise 6: insert a line "mango 100 \$100" after line 3 in "table1.txt