Systems and Scripts

Question 1

What do system and script commands help users do?

Answer 1

Gather system information and apply script-based environment changes.

Question 2

What two key commands are discussed?

Answer 2

uname and source.

Question 3

What is the purpose of the ‘uname’ command?

Answer 3

To retrieve system information such as kernel name, version, and system architecture.

Question 4

What does ‘uname -r’ show?

Answer 4

Kernel release.

Question 5

What does ‘uname -i’ display?

Answer 5

Hardware platform.

Question 6

What does ‘uname -a’ print?

Answer 6

All system details.

Question 7

Provide an example of using uname in a script.

Answer 7

echo “System Info: $(uname -a)”»_space; /var/log/sys_update.log

Question 8

What is the purpose of the example uname command?

Answer 8

Captures system information and appends it to a log file before a kernel update.

Question 9

What does the ‘source’ command do?

Answer 9

Executes scripts in the current shell session.

Question 10

Why is ‘source’ useful?

Answer 10

It applies script changes immediately without starting a new shell.

Question 11

What can the ‘source’ command update?

Answer 11

Environment variables, aliases, and configuration settings.

Question 12

Example of using the source command?

Answer 12

source /etc/profile.d/custom_vars.sh && echo “Environment variables updated successfully.”

Question 13

What does the example source command do?

Answer 13

Reloads environment variable script and confirms success if no errors occur.