Question

a: Analyse the following commands/programs and predict the output. i) awk ’$0 ~/aeiou/{print $0}’ file1 -(1 mark) ii) tail << file1.txt >> file2.txt -(1 mark) iii) echo "enter directory name" -(2 marks) read dir if [ -d $dir ] then ls $dir else echo "enter proper directory name" fi

Answer 1

i) It prints the contents of  file that contains "aeiou" i.e it must contain aeiou as a part $0 is of no significance ,If there is $1 then it prints first field of files that contains aeiou

ii)There is no ouput for this command

iii) It asks user to enter directory from user if directory exists then it prints the files that are in present in that directory,if directory does not exists it prints message "enter proper directory name"