Learn the Command Line---MANIPULATION ls, revisited

Learn the Command Line---MANIPULATION ls, revisited

What I did today...

---the ls command has several more options. Here are three common options:

-a - lists all contents, including hidden files and directories

-l - lists all contents of a directory in long format

-t - order files and directories by the time they were last modified.

ls -alt---ls -alt lists all contents, including hidden files and directories, in long format, ordered by the date and time they were last modified.

Here's what each column means(from left to right):

• 1. Access rights. These are actions that are permitted on a file or directory.
• 2. Number of hard links. This number counts the number of child directories and files. This number includes the parent directory link (..) and current directory link (.).
• 3. The username of the file's owner. Here the username is cc.
• 4. The name of the group that owns the file. Here the group name is eng.
• 5. The size of the file in bytes.
• 6. The date & time that the file was last modified.
• 7. The name of the file or directory.

How to navigate to the drama/biopic/ directory?

   cd ../drama/biopic/

cp command copies
mv move files
rm removes deletes files and directories
The -r is an option that modifies the behavior of the rm command. The -r stands for "recursive," and it's used to delete a directory and all of its child directories.

Notes: Be careful when you use rm! It deletes files and directories permanently. There isn't an undelete command, so once you delete a file or directory with rm, it's gone.

What did I learn...
   I learned more about how Command Line works and got lots of practice from the lessons. During the lesson, I found some serious problems about the website. It sometimes automatically resets the lessons and made me lose all my progress.

What I'm doing tomorrow...
   Because of the problems that I found about the Codecademy website, I've been thinking about changing my learning progress to another website such as w3schools.