6. File Viewing and Manipulation and Text Editors

Question 1

Which commands are used to view files one page at a time?

Answer 1

less filename.ext
more filename.ext

Question 2

Which command is used to view the first ten lines of a file?

Answer 2

head filename.ext

Question 3

Which command is used to view the first specific number of lines of a file?

Answer 3

head -number filename.ext

e.g

head -3 filename.ext will display the first 3 lines of a file

Question 4

There is a command that works exactly like the head command but starts reading files form the end what is the name of that command?

Answer 4

tail

tail filename.ext will show the last 10 lines of a file
tail -n 3 filename.ext will show the last 3 lines of file

Question 5

What command is used to count the lines, words, and characters in a given file?

Answer 5

wc filename.ext

result: lines words characters

Question 6

How would you specify you want to count only the number of lines, words, or characters in a given file?

Answer 6

wc -l filename.txt => for lines
wc -w filename.txt => for words
wc -c filename.txt => for characters

Question 7

What default Linux text editors do you know?

Answer 7

Vi
Nano

Question 8

In Vi or Vim, how do you open/create a new file?

Answer 8

vim filename.ext

Question 9

In Vi or Vim, how do you switch to insertion/editing mode once a file is open?

Answer 9

You press i

Question 9

In vi or vim, how do you go back to normal mode from insertion mode?

Answer 9

press esc

Question 10

In vi or vim, how do you save your file?

Answer 10

:w

and press enter

Question 11

In vi or vim, how do you exit the file?

Answer 11

:q or :q! to force quit without saving