Bash LAB , Update Display Name || Wrong

Could you please let me what i am doing Wrong

Hi @koushik_tu

The validation is a bit fussy here. You need to use double-quote " on the prompt string for it to pass, though single quote ' should also pass.

The other thing is

PS1='[\d]\u@\h:\w$' >> ~/.profile

is not going to update the file. You have to echo to get the line appended

echo 'PS1="[\d]\u@\h:\w$"' >> ~/.profile