Command line

Question 1

How to go back one directory

Answer 1

To navigate up one directory level, use “cd ..”

To navigate to the previous directory (or back), use “cd -“

Question 2

What does “cp” means?

Answer 2

The cp command will make a copy of a file for you. Example: “cp file foo” will make an exact copy of “file” and name it “foo”, but the file “file” will still be there. If you are copying a directory, you must use “cp -r directory foo” (copy recursively). (To understand what “recursively” means, think of it this way: to copy the directory and all its files and subdirectories and all their files and subdirectories of the subdirectories and all their files, and on and on, “recursively”)

Question 3

How to check all the command lines you have enter?

Answer 3

enter “history”

Question 4

What is the use of Ctrl + R?

Answer 4

Searches for commands you’ve already typed. When you have entered a very long, complex command and need to repeat it, using this key combination and then typing a portion of the command will search through your command history. When you find it, simply press Enter.

Question 5

List the directories and files, including the hidden files

Answer 5

ls -Force

Question 6

How to create a file ?

How to creatre a folder?

Answer 6

echo $null > filename

mkdir directory-name