How to solve proxy_fcgi:error AH01071: Got error 'Unable to open primary script

 Hello,

Recently I got stuck with strange bug on centOS server. After I updated document root for my primary domain which has Laravel App installed. 

When we try to access app through domain, we got following error. 

No input file specified.

I initially thought it's the permission issue on .htaccess issue. Tried changing permissions and adding some rewrite rules but it didn't work. When I checked apache error logs. I got following error. 

proxy_fcgi:error AH01071: Got error 'Unable to open primary script

I had no idea how to solve this error. So tried few things like

• Restart apache
• Restart php-fpm
• Restart VPS
• Removed and added account few times.
• Disabling php-fpm

But nothing worked. I spent almost entire night in solving this issue but no luck. But finally I was able to solve the issue by following steps. It was actually the issue with php fpm, as it was not able to find out root folder for the domain. So here is what you have to do. 

First go to userdata directory 

/var/cpanel/userdata/<USERNAME>

Here you will find one file. 

yourdomain.com.php-fpm.yaml

Open this file with nano or vim editor and add following line at the end of it. 

php_admin_value_doc_root: { name: 'php_admin_value[doc_root]', value: /home/<USERNAME>/public_html/<DOCUMENT_ROOT> }

Save the file and then execute following commands one by one.

/scripts/php_fpm_config --rebuild 

/scripts/restartsrv_apache_php_fpm 

/scripts/restartsrv_httpd

This will rebuild php fpm config and restart php fpm service for apache. Now in the same folder open 

YOURDOMAIN.com 

YOURDOMAIN.com_SSL

Change document root here as well and run following commands.

/scripts/rebuildhttpdconf 

/scripts/restartsrv_httpd

This will rebuild apache config file and restart apache. 

This is it and now if you visit your domain, you will not have the issue of file missing. 

Hope this saves your time

Copy Files via SSH from Another Server FTP

Recently for one of my project our server was hacked and some files were deleted and corrupted with malwares. So we had to restore the old backups. We were using the contabo web server where we have separate backup server with 100 GB space which was accessible only through FTP from the SSH. So in this blog I am going to explain how you can copy files Copy Files via SSH from Another Server FTP.

Step 1: Login to SSH with your SSH username and password. 

ssh yourusername@host

On prompt of password enter password and login.

Step 2 : Go to directory where you want to copy files from FTP.

cd /yourpath/to/folder

Step 3: Connect to FTP

Use following command to connect to FTP

ftp hostname

It will ask for username and password. Once you enter correct username and password, you will get ftp command prompt.

Step 4 : Go to directory from where you want to copy files on FTP.

cd /yourpath/to/folder

You can use cd command on FTP just like you  use on SSH.

Step 5 : Copy Specific File.

Use following command to copy file.

get filename

And wait for the process to be finished.

Step 6 : Exit From FTP

Use following command to close FTP and return back to SSH.

bye

With this you will close the FTP session and you are back to SSH session and you can see the copied files using LS command.

Upload File From Local Machine to Remote Server with SSH

Hello,

Recently while working on SSL on my Amazon EC 2 server I had to upload few certificates files from my local machine to EC 2 server. I had to spent some time to figure out this so thought of publishing blog on it so this may help others

First lets see how to upload file to remote server with permission on directory. We will use scp command for it. Following is the syntax.

$ scp /path/to/local/file sshuser@host:/path/to/remote/server

Once you run command it will prompt you for password. When you enter password it will upload file.

Now lets see what if you don't have password and have public or private key. Following is the command.

$ scp -i "yourkey" /path/to/local/file sshuser@host:/path/to/remote/server

If you have specified correct key it will upload your file.

Now here comes the real problem with EC 2. I was trying to upload crt file to system directory which was not allowed. So what you have to do is upload that file default ssh directory with following command

$ scp -i "yourkey" /path/to/local/file sshuser@host:filename

And then go to that directory. Usually in amazon EC 2. It's /home/ubntu directory. Then you can copy files from here using cp command with sudo.

I hope this helps you and dave your time.

Amazon EC2 File Upload Permission

Hello,

Recently in one of my project we hosted our PHP website on Amazon EC 2 which was running Apache on ubuntu. In our project we have file upload functionality which was not working. First I tired to set permission to 777 for the upload directory but still it was not working, so I went into details and found out this was the user permission issue. In this blog I am going to explain how to solve this.

Your website is running in Apache on Ubuntu. So there is a apache user, which is actually handling file operations. By default apache user does not have write permission and it does not own your website folder. So there are three basic steps to resolve this issue.

1) Find out your apache user.

Fist we have to find out name of apache user. Run following command in terminal.

ps -ef | grep apache

Check the left most column of the output. See the image below. That is name of your apache user.

In my case it was www-data user. 

2) Change directory owner to Apache user.

Change owner of your upload directory.

sudo chown www-data /var/www/html/uploads

3) Setup permission on your directory.

sudo chmod 755 /var/www/html/uploads

That's it. Now you can upload file from your web application. Hope this helps you and save your time.