Day 3 - Showing the content of a file

Solutions to exercises

Exercise 3.01

Print the content of the file examples.txt numbering lines.

Solution

According to the man page of cat the -n option numbers all output lines. So

$ cat -n examples.txt

1

dog

2

cat

3

elephant

4

ostrich

5

Dug the Dog

[...]

gives the desired result.

Go back to the exercise

Exercise 3.02

Check if the file examples.txt contains spaces at the end of any line.

Solution

According to the man page of cat the -E option displays $ at the end of each line. So