Day 2 - Basic Linux commands

Task: Write Linux commands to :

1. Check your present working directory.

pwd

2. List all the files or directories including hidden files.

ls -a

3. Create a nested directory A/B/C/D/E

mkdir -p A/B/C/D/E

NOTE!

Man pages are available on both your linux machine and the Internet.

For e.g., to read the man page of ls command, just type the following in your terminal:

man ls

A man page looks something like this below. Not necessarily by color, but yeah... :)

While it is convenient to have handy commands with flags like following:

ls -a    #prints all the files in a directory including the hidden ones
ls -l    #prints detailed information of directory contents
ls -al   #composite flags to a command
ls -al /home/$USER/Documents #composite flags to a particular path

But what if you want to print the directory contents in a sorted fashion of their creation of date??

Here I recommend you going to the man page first. It's a habit that might require efforts initially to get used to, but in the long run, it will make you independent. Often in certain certification exams, internet access is restricted; Only man pages are allowed.

The solution to above is ls -t actually!

Also, see the image below and try answering what those two commands actually do.

Besides this, the most frequently used commands in linux are:

1. cp -> copy a file/folder

2. mkdir -> create directory

3. touch -> create a file

4. rm -> remove a file/folder

5. cd -> change directory

6. clear -> erase terminal screen

7. echo -> display a line of text

8. exit -> terminate a process

9. cat / bat (check this one out, it's cool) -> display contents of a file

10. sudo -> execute a command as superuser

11. ping -> check if connected to internet

Happy Learning ;)