.bashrc and .bash_profile in Linux CLI - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

What is the output of this command sequence?

You have a .bash_profile that contains echo "Profile loaded" and a .bashrc that contains echo "RC loaded". You start a new login shell. What will be printed?

A

Profile loaded
RC loaded

B

RC loaded
Profile loaded

C Profile loaded

D RC loaded

💡 Hint

Remember that login shells read .bash_profile and interactive shells read .bashrc.

When you start a login shell, .bash_profile is read first. If it calls .bashrc, then both messages appear. Usually, .bash_profile sources .bashrc, so both messages print in order.

🧠 Conceptual

intermediate

Which file is read by a non-login interactive shell?

When you open a new terminal window in a graphical environment (like GNOME Terminal), which file does bash read?

A ~/.bash_logout

B ~/.bash_profile

C ~/.profile

D ~/.bashrc

💡 Hint

Non-login interactive shells read a different file than login shells.

Non-login interactive shells read ~/.bashrc to load user configurations.

🔧 Debug

advanced

Why does a command in .bashrc not run on login?

You added echo "Hello from .bashrc" to your ~/.bashrc but it does not print when you login via SSH. Why?

A Because .bashrc has wrong permissions

B Because echo commands are ignored in .bashrc

C Because .bashrc is not read by login shells by default

D Because SSH disables all shell startup files

💡 Hint

Think about which files login shells read.

Login shells read .bash_profile or .profile, not .bashrc by default. To run .bashrc commands on login, .bash_profile must source .bashrc.

🚀 Application

advanced

How to ensure .bashrc runs on login shells?

You want your .bashrc commands to run every time you login (including SSH). Which snippet should you add to your ~/.bash_profile?

A exec ~/.bashrc

B

if [ -f ~/.bashrc ]; then
  source ~/.bashrc
fi

C source ~/.bash_profile

D cat ~/.bashrc

💡 Hint

You want to run .bashrc only if it exists.

The common practice is to check if .bashrc exists and source it in .bash_profile to run .bashrc commands on login shells.

💻 Command Output

expert

What is the output of this .bash_profile snippet?

Given this ~/.bash_profile content:

echo "Start"
if [ -f ~/.bashrc ]; then
  . ~/.bashrc
fi
echo "End"

And ~/.bashrc contains:

echo "Inside RC"

What is printed when you login?

A

Start
Inside RC
End

B

Inside RC
Start
End

C

End
Start
Inside RC

D

Start
End

💡 Hint

Commands run in order as the shell reads the files.

The .bash_profile prints "Start", then sources .bashrc which prints "Inside RC", then prints "End".