less and more (paginated viewing) in Linux CLI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to view the contents of a file named 'example.txt' one page at a time using the 'less' command.

Linux CLI

less [1]

Drag options to blanks, or click blank then click option'

A-n

B-r

C--help

Dexample.txt

Attempts:

3 left

💡 Hint

Common Mistakes

Using options like '-r' or '-n' without specifying the file.

Typing only 'less' without a file name.

The 'less' command followed by the filename 'example.txt' opens the file for paginated viewing.

2fill in blank

medium

Complete the command to view the output of 'dmesg' command one page at a time using 'more'.

Linux CLI

dmesg | [1]

Drag options to blanks, or click blank then click option'

Aless

Bmore

Ccat

Dhead

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'cat' which outputs all at once.

Using 'head' which shows only the first few lines.

The pipe '|' sends the output of 'dmesg' to 'more' for paginated viewing.

3fill in blank

hard

Fix the error in the command to view a file named 'log.txt' with 'less' and show line numbers.

Linux CLI

less [1] log.txt

Drag options to blanks, or click blank then click option'

A-N

B-n

C-l

D-h

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-n' which disables line numbers in 'less'.

Using '-l' or '-h' which are unrelated options.

The '-N' option with 'less' shows line numbers while viewing the file.

4fill in blank

hard

Fill both blanks to create a command that shows the first 20 lines of 'data.txt' and then views it page by page.

Linux CLI

head [1] [2] data.txt | less

Drag options to blanks, or click blank then click option'

A-n

Bdata.txt

C20

D-20

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-20' instead of '-n 20' which is less clear.

Swapping the order of options and filename.

The 'head -n 20 data.txt' command shows the first 20 lines of the file, piped into 'less' for paginated viewing.

5fill in blank

hard

Fill all three blanks to create a command that searches for the word 'error' in 'system.log', ignoring case, and views the results page by page.

Linux CLI

grep [1] [2] [3] | less

Drag options to blanks, or click blank then click option'

A-i

Berror

Csystem.log

D-v

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-v' which inverts the match.

Swapping the order of search word and filename.

The command 'grep -i error system.log | less' searches case-insensitively for 'error' in 'system.log' and pipes the output to 'less' for paginated viewing.