Linux

Setup

Go to https://termbox.io/ and create a new Ubuntu server

note: everything deletes after 3 hours

File Manipulation

See all the files and folders in the folder with:

ls

Make a new folder with:

mkdir <folder_name>

Go into a folder with:

cd <folder_name>

Create a new file with:

touch <file_name>

Edit a file with: (CTRL + X then ENTER to save and quit)

nano <file_name>

Remove a file with:

rm -r <folder_name>

Remove a folder with:

rm <file_name>

File Manipulation (continued)

See which folder you are in with:

pwd

Copy files:

cp <path_to_file_to_copy> <path_to_new_file>
cp myfile.txt myfile2.txt

View file content:

cat <file_name>

Pipes

Pipes are used for sending the output of a command to another command or into a file.

Sending output of one command to another command:

<command_1> | <command_2>

> echo "Hello World!" | cat

Hello World!

Sending output of a command to a file:

<command_1> > <file_name>

> echo "Hello World!" > myfile.txt

> cat myfile.txt

Hello World!

Try This

1. Make a new file and put some text inside with the nano command. (Remember: CTRL + X then Enter to save and quit)
2. Search through the file:

The grep command is used for searching through some text.

> cat myfile.txt

Hello World
This is a test file.

> cat myfile.txt | grep "Hello"

Hello World

Installing Packages

The apt command is very powerful and allows you to download commands and it is very simple to use.

Update package lists:

Install a package:

apt-get install <package_name>

apt-get remove <package_name>

Remove a package:

apt-get update

Making Scripts

Make a new file called myscript with the following contents:

echo "Welcome to my script!"
echo "Type in your name then press enter: "
read name
echo "You have a very nice name $name"

Then run the script using: sh myscript.sh

Try and make a script that does some other commands.

If/Else

# Simple IF statement

if [ "$name" = "Bob" ]; then
    echo "Your name is really nice."
fi

# Simple IF ELSE statement

if [ "$name" = "Bob" ]; then
    echo "Your name is really nice."
else
    echo "I don't like your name."
fi