Mike doctor

Mike doctor

1623632400

Elon Musk is Going To Take Dogecoin To The Next Level!

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Elon Musk is Going To Take Dogecoin To The Next Level!

How to Bash Read Command

Bash has no built-in function to take the user’s input from the terminal. The read command of Bash is used to take the user’s input from the terminal. This command has different options to take an input from the user in different ways. Multiple inputs can be taken using the single read command. Different ways of using this command in the Bash script are described in this tutorial.

Syntax

read [options] [var1, var2, var3…]

The read command can be used without any argument or option. Many types of options can be used with this command to take the input of the particular data type. It can take more input from the user by defining the multiple variables with this command.

Some Useful Options of the Read Command

Some options of the read command require an additional parameter to use. The most commonly used options of the read command are mentioned in the following:

OptionPurpose
-d <delimiter>It is used to take the input until the delimiter value is provided.
-n <number>It is used to take the input of a particular number of characters from the terminal and stop taking the input earlier based on the delimiter.
-N <number>It is used to take the input of the particular number of characters from the terminal, ignoring the delimiter.
-p <prompt>It is used to print the output of the prompt message before taking the input.
-sIt is used to take the input without an echo. This option is mainly used to take the input for the password input.
-aIt is used to take the input for the indexed array.
-t <time>It is used to set a time limit for taking the input.
-u <file descriptor>It is used to take the input from the file.
-rIt is used to disable the backslashes.

 

Different Examples of the Read Command

The uses of read command with different options are shown in this part of this tutorial.

Example 1: Using Read Command without Any Option and variable

Create a Bash file with the following script that takes the input from the terminal using the read command without any option and variable. If no variable is used with the read command, the input value is stored in the $REPLY variable. The value of this variable is printed later after taking the input.

#!/bin/bash  
#Print the prompt message
echo "Enter your favorite color: "  
#Take the input
read  
#Print the input value
echo "Your favorite color is $REPLY"

Output:

The following output appears if the “Blue” value is taken as an input:

Example 2: Using Read Command with a Variable

Create a Bash file with the following script that takes the input from the terminal using the read command with a variable. The method of taking the single or multiple variables using a read command is shown in this example. The values of all variables are printed later.

#!/bin/bash  
#Print the prompt message
echo "Enter the product name: "  
#Take the input with a single variable
read item

#Print the prompt message
echo "Enter the color variations of the product: "  
#Take three input values in three variables
read color1 color2 color3

#Print the input value
echo "The product name is $item."  
#Print the input values
echo "Available colors are $color1, $color2, and $color3."

Output:

The following output appears after taking a single input first and three inputs later:

Example 3: Using Read Command with -p Option

Create a Bash file with the following script that takes the input from the terminal using the read command with a variable and the -p option. The input value is printed later.

#!/bin/bash  
#Take the input with the prompt message
read -p "Enter the book name: " book
#Print the input value
echo "Book name: $book"

Output:

The following output appears after taking the input:

Example 4: Using Read Command with -s Option

Create a Bash file with the following script that takes the input from the terminal using the read command with a variable and the -s option. The input value of the password will not be displayed for the -s option. The input values are checked later for authentication. A success or failure message is also printed.

#!/bin/bash  
#Take the input with the prompt message
read -p "Enter your email: " email
#Take the secret input with the prompt message
read -sp "Enter your password: " password

#Add newline
echo ""

#Check the email and password for authentication
if [[ $email == "admin@example.com" && $password == "secret" ]]
then
   #Print the success message
   echo "Authenticated."
else
   #Print the failure message
   echo "Not authenticated."
fi

Output:

The following output appears after taking the valid and invalid input values:

Example 5: Using Read Command with -a Option

Create a Bash file with the following script that takes the input from the terminal using the read command with a variable and the -a option. The array values are printed later after taking the input values from the terminal.

#!/bin/bash  
echo "Enter the country names: "  
#Take multiple inputs using an array  
read -a countries

echo "Country names are:"
#Read the array values
for country in ${countries[@]}
do
    echo $country
done

Output:

The following output appears after taking the array values:

Example 6: Using Read Command with -n Option

Create a Bash file with the following script that takes the input from the terminal using the read command with a variable and the -n option.

#!/bin/bash  
#Print the prompt message
echo "Enter the product code: "  
#Take the input of five characters
read -n 5 code
#Add newline
echo ""
#Print the input value
echo "The product code is $code"

Output:

The following output appears if the “78342” value is taken as input:

Example 7: Using Read Command with -t Option

Create a Bash file with the following script that takes the input from the terminal using the read command with a variable and the -t option.

#!/bin/bash  
#Print the prompt message
echo -n "Write the result of 10-6: "  
#Take the input of five characters
read -t 3 answer

#Check the input value
if [[ $answer == "4" ]]
then
   echo "Correct answer."
else
   echo "Incorrect answer."
fi

Output:

The following output appears after taking the correct and incorrect input values:

Conclusion

The uses of some useful options of the read command are explained in this tutorial using multiple examples to know the basic uses of the read command.

Original article source at: https://linuxhint.com/

#bash #command 

David mr

David mr

1624298400

DOGECOIN PRICE PREDICTION - ELON MUSK AND MILEY CYRUS WILL MAKE DOGECOIN GO TO $1 🚀🚀

DOGECOIN PRICE PREDICTION - ELON MUSK AND MILEY CYRUS WILL MAKE DOGECOIN GO TO $1 🚀🚀

This huge update for dogecoin shows dogecoin price prediction to $1 after elon musk and Miley Cyrus will make dogecoin go to $1 on Saturday night live as long as everything goes good in May 8th.
📺 The video in this post was made by Josh’s Finance
The origin of the article: https://www.youtube.com/watch?v=v9_pvUTK_Io
🔺 DISCLAIMER: The article is for information sharing. The content of this video is solely the opinions of the speaker who is not a licensed financial advisor or registered investment advisor. Not investment advice or legal advice.
Cryptocurrency trading is VERY risky. Make sure you understand these risks and that you are responsible for what you do with your money
🔥 If you’re a beginner. I believe the article below will be useful to you ☞ What You Should Know Before Investing in Cryptocurrency - For Beginner
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David mr

David mr

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DOGECOIN UPDATE - DOGECOIN PREDICTION - DOGECOIN TO THE MOON & ELON MUSK TWEET TO $1

DOGECOIN UPDATE - DOGECOIN PREDICTION - DOGECOIN TO THE MOON & ELON MUSK TWEET TO $1

The dogecoin update and dogecoin prediction are good indicators that dogecoin to the moon will happen as elon musk tweet on dogecoin could see dogecoin to $1, with the latest dogecoin news and doge price prediction shows doge to $1 is possible. Elon musk will be going on Saturday Night Live on May 8th, 2021, and Elon musk said dogecoin to $1.
📺 The video in this post was made by Josh’s Finance
The origin of the article: https://www.youtube.com/watch?v=QB9BENyljwU
🔺 DISCLAIMER: The article is for information sharing. The content of this video is solely the opinions of the speaker who is not a licensed financial advisor or registered investment advisor. Not investment advice or legal advice.
Cryptocurrency trading is VERY risky. Make sure you understand these risks and that you are responsible for what you do with your money
🔥 If you’re a beginner. I believe the article below will be useful to you ☞ What You Should Know Before Investing in Cryptocurrency - For Beginner
⭐ ⭐ ⭐The project is of interest to the community. Join to Get free ‘GEEK coin’ (GEEKCASH coin)!
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Thanks for visiting and watching! Please don’t forget to leave a like, comment and share!

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David mr

David mr

1624377900

DOGECOIN PREDICTION - DOGECOIN TO THE MOON AFTER ELON MUSK SNL

DOGECOIN PREDICTION - DOGECOIN TO THE MOON AFTER ELON MUSK SNL

Dogecoin prediction comes along with dogecoin to the moon after elon musk snl on May 8th, 2021. Seeing a bunch of bullish moments and moves coming on dogecoin near that time, will dogecoin to $1 be happening or will dogecoin crash? Big influencers like elon musk, mark cuban, snoop dogg all play a huge factor on what happens to dogecoin on the long-term

📺 The video in this post was made by Josh’s Finance
The origin of the article: https://www.youtube.com/watch?v=zcNyNxjo7lI
🔺 DISCLAIMER: The article is for information sharing. The content of this video is solely the opinions of the speaker who is not a licensed financial advisor or registered investment advisor. Not investment advice or legal advice.
Cryptocurrency trading is VERY risky. Make sure you understand these risks and that you are responsible for what you do with your money
🔥 If you’re a beginner. I believe the article below will be useful to you ☞ What You Should Know Before Investing in Cryptocurrency - For Beginner
⭐ ⭐ ⭐The project is of interest to the community. Join to Get free ‘GEEK coin’ (GEEKCASH coin)!
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Thanks for visiting and watching! Please don’t forget to leave a like, comment and share!

#bitcoin #blockchain #dogecoin prediction #dogecoin #dogecoin to the moon after elon musk snl #elon musk

David mr

David mr

1624392000

DOGECOIN UPDATE - DOGECOIN PREDICTION - DOGECOIN TO THE MOON AFTER ELON MUSK TWEET

DOGECOIN UPDATE - DOGECOIN PREDICTION - DOGECOIN TO THE MOON AFTER ELON MUSK TWEET

This dogecoin update shows dogecoin prediction and dogecoin to the moon, will doge to $1 after elon musk and mark cuban tweet? elon musk coming on snl soon to help dogecoin!
📺 The video in this post was made by Josh’s Finance
The origin of the article: https://www.youtube.com/watch?v=ZWPDxVbwqiw
🔺 DISCLAIMER: The article is for information sharing. The content of this video is solely the opinions of the speaker who is not a licensed financial advisor or registered investment advisor. Not investment advice or legal advice.
Cryptocurrency trading is VERY risky. Make sure you understand these risks and that you are responsible for what you do with your money
🔥 If you’re a beginner. I believe the article below will be useful to you ☞ What You Should Know Before Investing in Cryptocurrency - For Beginner
⭐ ⭐ ⭐The project is of interest to the community. Join to Get free ‘GEEK coin’ (GEEKCASH coin)!
☞ **-----CLICK HERE-----**⭐ ⭐ ⭐
Thanks for visiting and watching! Please don’t forget to leave a like, comment and share!

#bitcoin #blockchain #dogecoin #dogecoin update #dogecoin prediction #dogecoin update - dogecoin prediction - dogecoin to the moon after elon musk tweet