export command in Linux CLI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the environment variable MY_VAR to 'hello' using export.

Linux CLI

export MY_VAR=[1]

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

Ahello

B'hello'

C"hello"

DHELLO

Attempts:

3 left

💡 Hint

Common Mistakes

Not using quotes can cause errors if the value has spaces or special characters.

Using uppercase without quotes sets a different value.

The export command sets environment variables. To assign a string with spaces or special characters, use quotes. Here, 'hello' is correctly quoted with single quotes.

2fill in blank

medium

Complete the code to export the PATH variable by adding '/usr/local/bin' at the end.

Linux CLI

export PATH=$PATH[1]/usr/local/bin

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

A:

B;

C,

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using semicolon ';' which is for Windows paths.

Using plus '+' or comma ',' which are invalid separators.

In Linux, PATH entries are separated by colons ':'. To add a new directory, append it with a colon separator.

3fill in blank

hard

Fix the error in the code to export a variable named DATA_DIR with the value '/data/files'.

Linux CLI

export [1]='/data/files'

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

Adata_dir

Bdata-dir

CDataDir

DDATA_DIR

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase or mixed case variable names.

Using dashes '-' which are invalid in variable names.

Environment variable names should be uppercase and cannot contain dashes. DATA_DIR is the correct format.

4fill in blank

hard

Fill both blanks to export a variable named CONFIG_PATH with the value '/etc/config'.

Linux CLI

export [1]=[2]

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

ACONFIG_PATH

B'/etc/config'

C"/etc/config"

Dconfig_path

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase variable names.

Not quoting the value.

Variable names should be uppercase with underscores. The value should be quoted to handle special characters.

5fill in blank

hard

Fill all three blanks to export a variable named LIB_PATH by adding '/usr/lib' to the existing LIB_PATH.

Linux CLI

export [1]=$[2]:[3]

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

ALIB_PATH

C/usr/lib

D/usr/local/lib

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names in export and reference.

Using wrong path or separator.

To add a directory to an existing variable, use the variable name on both sides and separate with a colon. Here, LIB_PATH is updated by appending '/usr/lib'.