Copy BigQuery dataset to another dataset – copy all tables at once

Sometime it’s necessary to copy or clone the entire Big Query dataset to another dataset. If you Big Query dataset has lots of table, then it’s very time consuming to clone or copy all tables one by one.

But for the help of Shell script, we can combine few `bq`  command and can make our life easier for this types of bulk tasks. I just googled to get similar solutions and combined few things in a single shell script.

Here is the script to copy or clone the entire Big Query dataset in another dataset.

Shell Script to copy Big Query Dataset

for f in `bq ls -n TOTAL_NUMBER_OF_TABLES $SOURCE_DATASET |grep TABLE | awk '{print $1}'`
  export CLONE_CMD="bq --nosync cp $SOURCE_DATASET.$f $DEST_PREFIX$f"
  echo $CLONE_CMD
  echo `$CLONE_CMD`

In the above command –nosync will help you to load bq job asynchronously. So you don’t need to wait for current job to finish. Also TOTAL_NUMBER_OF_TABLES you need to replace with existing dataset’s total number of tables you want to copy. i.e: 200

Now, run the above shell script and start kicking the bq job payload.

GeoIP alternative to get IP location – Google App Engine PHP Recipes

Today’s recipes is all about to get very basic information about your visitor’s IP address location. Unfortunately, in Google App Engine, PHP GeoIP extension is not enabled in their standard environment. So sometimes, it’s essential for application developer to get the visitor’s IP address location.

Here, you can easily get user’s IP address location with 3 information easily and by default from Google App Engine. In GAE, if you will discover that Google app engine itself added few extra _X_headers in $_SERVER super-global variable. I am dumping the $_SERVER variable here.

//Output of $_SERVER

    'AUTH_DOMAIN' => '',
    'CURRENT_MODULE_ID' => 'default',
    'CURRENT_VERSION_ID' => '20170319t185047.399949465273621812',
    'DOCUMENT_ROOT' => '/base/data/home/apps/xxxxxxxxxxxxxx/20170319t185047.399949465273621812',
    'HTTPS' => 'on',
    'HTTP_ACCEPT' => 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*\/*;q=0.8',
    'HTTP_ACCEPT_LANGUAGE' => 'en-US,en;q=0.8,bn;q=0.6,ms;q=0.4,pt;q=0.2',
    'HTTP_HOST' => '',
    'HTTP_USER_AGENT' => 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.110 Safari/537.36',
    'HTTP_X_APPENGINE_CITY' => 'dhaka',
    'HTTP_X_APPENGINE_CITYLATLONG' => '23.709921,90.407143',
    'HTTP_X_CLOUD_TRACE_CONTEXT' => 'xxxxxxxxxxxxxxxxxxxxxxxxxx/xxxxxxxxxx;o=x',
    'INSTANCE_ID' => 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
    'PATH_TRANSLATED' => '/base/data/home/apps/xxxxxxxxxxxxxxxxxxxx/xxxxxxxxxxxxxxxxxxxxxxx/index.php',
    'PHP_INI_SCAN_DIR' => '/base/data/home/apps/xxxxxxxxxxxxxxxxxxxxxx/xxxxxxxxxxxxxxxxxxxxxxx/',
    'PHP_SELF' => '/index.php',
    'REMOTE_ADDR' => '',
    'REQUEST_LOG_ID' => 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
    'REQUEST_URI' => '/',
    'SCRIPT_FILENAME' => '/base/data/home/apps/xxxxxxxxxxxxxxxxxxxxxx/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/index.php',
    'SCRIPT_NAME' => '/index.php',
    'SERVER_NAME' => '',
    'SERVER_PROTOCOL' => 'HTTP/1.1',
    'SERVER_SOFTWARE' => 'Google App Engine/1.9.48',
    'USER_IS_ADMIN' => '0',
    'REQUEST_TIME_FLOAT' => 148992.7,
    'REQUEST_TIME' => 14899,
    'argv' =>
    'argc' => 0,

//Get the visitor's IP details
$visitorIp = [
    'ip' => $_SERVER['REMOTE_ADDR'],


And from that, we can easily get the visitor’s City, City-level lat long, country and region that primary will help you to get visitor’s location.

Connect Google Cloud SQL from Local Machine using Unix Socket

You need to install Google Cloud SDK and check if you have gcloud command available in terminal. After installing gcloud you need to configure gcloud sdk by running gcloud init command.

I am assuming, you have configured your Google Cloud SQL instance for your project. If yes, then continue, otherwise you need to read “Google Cloud SQL Quickstarter Guide“.

Now Download cloud_sql_proxy.linux.amd64 package in your local machine with

"sudo wget"

this command.

Rename by mv cloud_sql_proxy.linux.amd64 cloud_sql_proxy
and give execution permission by chmod +x cloud_sql_proxy

Create application default credentials using “gcloud auth application-default login” command

Create a directory sudo mkdir -p /cloudsql for Google Cloud SQL proxy unix socket and make that directory writable sudo chmod 777 /cloudsql

start sql socket proxy by ./cloud_sql_proxy -dir=/cloudsql &

At last,
Now you can have working mysql DSN “mysql:unix_socket=/cloudsql/INSTANCE_CONNECTION_NAME” which you can use in your application and your application will work with Google Cloud SQL instance directly from local machine.

Please ask me anything about this post in comment below. I will be glad to assist you happily.


Stop and Remove all docker containers and images

Some important commands for Docker containers and images. It’s useful for delete all docker containers and images altogether at once.

# Stop all docker containers
docker stop $(docker ps -a -q)

#Remove all docker containers
docker rm $(docker ps -a -q)

# Delete all images
docker rmi $(docker images -q)

Enable FTP Passive mode in PureFTP in your cPanel server

To enable the passive port range for Pure-FTPd, perform the following via the command line as the root user:

  • Open the /etc/pure-ftpd.conf configuration file in your preferred text editor.
  • Remove the comment (#) from the beginning of the line which contains the PassivePortRange option.
  • Change that line to the following:
    PassivePortRange 49152 65534

  • Save the changes to the configuration file.
  • Run the sudo /usr/local/cpanel/scripts/restartsrv_ftpserver command to restart the server.

These configuration changes may be overwritten by system updates. To make these changes permanent, perform the following additional steps via the command line as the root user:

  • Run the sudo rm -f /var/cpanel/conf/pureftpd/main.cache command to clear the cache.

  • Run the sudo echo "PassivePortRange: 49152 65534" >> /var/cpanel/conf/pureftpd/main command to append the passive ports to the configuration file.

Now if the port number is not opened in your iptables then do the following to enable this passive mode port range enable in your iptables.

sudo iptables -I INPUT -p tcp --dport 49152:65534 -j ACCEPT
sudo service iptables save

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