Bash ошибка синтаксиса неожиданный конец файла

I was able to cut and paste your code into a file and it ran correctly. If you
execute it like this it should work:

Your «file.sh»:

#!/bin/bash
# june 2011

if [ $# -lt 3 -o $# -gt 3 ]; then
   echo "Error... Usage: $0 host database username"
   exit 0
fi

The command:

$ ./file.sh arg1 arg2 arg3

Note that «file.sh» must be executable:

$ chmod +x file.sh

You may be getting that error b/c of how you’re doing input (w/ a pipe, carrot,
etc.). You could also try splitting the condition into two:

if [ $# -lt 3 ] || [ $# -gt 3 ]; then
   echo "Error... Usage: $0 host database username"
   exit 0
fi

Or, since you’re using bash, you could use built-in syntax:

if [[ $# -lt 3 || $# -gt 3 ]]; then
   echo "Error... Usage: $0 host database username"
   exit 0
fi

And, finally, you could of course just check if 3 arguments were given (clean,
maintains POSIX shell compatibility):

if [ $# -ne 3 ]; then
   echo "Error... Usage: $0 host database username"
   exit 0
fi

You are running a Bash script, and you see a syntax error: Unexpected end of file.

What does it mean?

This can happen if you create your script using Windows.

Why?

Because Windows uses a combination of two characters, Carriage Return and Line Feed, as line break in text files (also known as CRLF).

On the other side Unix (or Linux) only use the Line Feed character as line break.

So, let’s see what happens if we save a script using Windows and then we execute it in Linux.

Using the Windows notepad I have created a Bash script called end_of_file.sh:

#/bin/bash

if [ $# -gt 0 ]; then
  echo "More than one argument passed"
else
  echo "No arguments passed"
fi

And here is the output I get when I execute it:

[ec2-user@localhost scripts]$ ./end_of_file.sh 
./end_of_file.sh: line 2: $'\r': command not found
./end_of_file.sh: line 8: syntax error: unexpected end of file 

How do we see where the problem is?

Edit the script with the vim editor using the -b flag that runs the editor in binary mode:

[ec2-user@localhost scripts]$ vim -b end_of_file.sh

(Below you can see the content of the script)

#/bin/bash^M
^M
if [ $# -gt 0 ]; then^M
  echo "More than one argument passed"^M
else^M
  echo "No arguments passed"^M
fi^M

At the end of each line we see the ^M character. What is that?

It’s the carriage return we have mentioned before. Used by Windows but not by Unix (Linux) in line breaks.

To solve both errors we need to convert our script into a format that Linux understands.

The most common tool to do that is called dos2unix.

If dos2unix is not present on your system you can use the package manager of your distribution to install it.

For instance, on my server I can use YUM (Yellowdog Updater Modified).

To search for the package I use the yum search command:

[root@localhost ~]$ yum search dos2unix
Loaded plugins: extras_suggestions, langpacks, priorities, update-motd
====================== N/S matched: dos2unix =====================================
dos2unix.x86_64 : Text file format converters

And then the yum install command to install it:

[root@localhost ~]$ yum install dos2unix
Loaded plugins: extras_suggestions, langpacks, priorities, update-motd
amzn2-core                                                   | 2.4 kB  00:00:00
amzn2extra-docker                                            | 1.8 kB  00:00:00     
Resolving Dependencies
--> Running transaction check
---> Package dos2unix.x86_64 0:6.0.3-7.amzn2.0.2 will be installed
--> Finished Dependency Resolution 

Dependencies Resolved 

==================================================================================
  Package       Arch        Version            Repository            Size
==================================================================================
 Installing:
  dos2unix      x86_64      6.0.3-7.amzn2.0.2  amzn2-core            75 k
 
 Transaction Summary
==================================================================================
 Install  1 Package

 Total download size: 75 k
 Installed size: 194 k
 Is this ok [y/d/N]: y
 Downloading packages:
 dos2unix-6.0.3-7.amzn2.0.2.x86_64.rpm                      |  75 kB  00:00:00     
 Running transaction check
 Running transaction test
 Transaction test succeeded
 Running transaction
   Installing : dos2unix-6.0.3-7.amzn2.0.2.x86_64                          1/1 
   Verifying  : dos2unix-6.0.3-7.amzn2.0.2.x86_64                          1/1 

 Installed:
   dos2unix.x86_64 0:6.0.3-7.amzn2.0.2                                                                                                                         
 Complete! 

We are ready to convert our script using dos2unix!

[ec2-user@localhost scripts]$ dos2unix end_of_file.sh 
dos2unix: converting file end_of_file.sh to Unix format ... 

And now it’s time to execute it:

[ec2-user@localhost scripts]$ ./end_of_file.sh  No arguments passed

It works!

If you are interested I have written an article that explains the basics of Bash script arguments.

Conclusion

I have found myself having to use the dos2unix command several times over the years.

And now you know what to do if you see the syntax error “Unexpected end of file” while running a Bash script 🙂

Related FREE Course: Decipher Bash Scripting

The syntax error at the unexpected end of the file line is caused due to mismatched structure of the code. The machine executes the code line by line, so the syntax needs to be correct, with proper use of quotes (“”), brackets (), and other formatting. Several code editors provide code formatting, like showing interactive colors, which can be helpful for the users. Vim shows different colors and code formatting, which removes the chances of bracket missing.

This code will discuss the following topic in this guide:

• What is a Syntax Error an Unexpected End of File Error in Linux?
• Reason: Incorrect Syntax
• Solution: Correct the Syntax (Close the if Condition)
• Example Scenario: Bracket is Missing
• Solution of Example Scenario: Insert the Missing Bracket

Let’s start!

What is a Syntax Error an Unexpected End of File Error in Linux?

As the name indicated, this error is caused due to syntax error, which is a user’s side mistake. There are several types of syntax errors, for instance, the bracket is not closed, and others. When there is a syntax error in the code, the output displays the below error:

Reason: Incorrect Syntax

The below code is written to execute an if condition, which shows “Target Achieved” if the condition is satisfied else, shows the text “Target not Achieved.” However, the execution of code displays the following error message:

 #!/bin/bash
num1=15;
num2=8;
sum=$(($num1+$num2));
if [ $sum>20 ]; then
echo "Target Achieved!"
else
echo "Target not Achieved."

Let’s check how it behaves once executed:

The error itself shows the syntax error.

Solution: Correct the Syntax (Close the if Condition)

The code shows that the “if” condition is opened but never closed. As for every “then” keyword of the if condition, the keyword “fi” is used to close that condition. The code shows that the if condition is open but not closed using the “fi” keyword, so the error can be removed after correcting the syntax error and putting the “fi” at the end of the if condition.

Let’s put the missing “fi” keyword and check its output:

#!/bin/bash
num1=15;
num2=8;
sum=$(($num1+$num2));
if [ $sum>20 ]; then
echo "Target Achieved!"
else
echo "Target not Achieved."
fi

Run the script as follows:

The output shows the “if” condition result “Target Achieved!”, which verifies the error is removed.

Example Scenario: Bracket is Missing

Keeping the above code, now we have missed putting the bracket while calculating the sum of the two variables.

#!/bin/bash
num1=15;
num2=8;
sum=$(($num1+$num2);
if [ $sum>20 ]; then
echo "Target Achieved!"
else
echo "Target not Achieved."
fi

Execute the script:

The error shows there is something wrong with the syntax.

Solution of Example Scenario: Insert the Missing Bracket

Let’s correct the error by putting the “)” and executing it. The below code is corrected by putting the missing “)”, let’s execute it:

#!/bin/bash
num1=15;
num2=8;
sum=$(($num1+$num2));
if [ $sum>20 ]; then
echo "Target Achieved!"
else
echo "Target not Achieved."
fi

Now, the script is executed:

The error-free output shows the syntax error is removed.

Similarly, if you are getting this error, you must check the syntax you have followed in writing a program.

That’s the end.

Conclusion

The error “syntax error: unexpected end of file” occurs due to the mismatched structure of the code (incorrect syntax). Examples of it are missing the bracket or not closing the condition (after which the file is terminated). To counter this, you need to look at the syntax and fix all the errors to solve “syntax error: unexpected end of file”.