naveen's questions

I have replaced word 'merchant' to 'capital' in files founded in the current directory using following command:

find * -type f -exec sed -i -e 's/merchant/capital/g' {} \;

but above command will modify the file date also, is there any way to stop file modification date?

Thanks in advance.

I have a directory employer/. In this there are 5 .txt files.

I want to combine the data from all 5 files and show into the command prompt using cat or create another file and save the result in that file. How can I do this?

I am new to Ubuntu.

On login only my single user with guest is displayed. Is it possible to show multiple user names including admin user?

sudo sh -c 'echo "greeter-show-manual-login=true" >> /etc/lightdm/lightdm.conf'

Can you explain the above code usage?

How do I delete the following directory?

I typed:

rmdir lampp

This error comes up:

rmdir: failed to remove `lampp': Directory not empty

Is there a command to delete all the files in the directory and delete the directory folder?