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Assorted Snippits

Hack any paid WiFi hotspot in about 30 seconds

ifconfig en1 | grep ether
arp -a
sudo ifconfig en1 ether [mac address to spoof]

Git Command

  • git init creates a new Git repository
  • git status inspects the contents of the working directory and staging area
  • git add adds files from the working directory to the staging area
  • git diff shows the difference between the working directory and the staging area
  • git commit permanently stores file changes from the staging area in the repository
  • git log shows a list of all previous commits
  • git reset --hard Revert changes to modified files.
  • git clean -fd Remove all untracked files and directories.
  • git checkout -b topic-branch # To create New Branch
  • git branch # To check branch which you are in
  • git checkout master # To return to master branch or change another branch

Create Multiple Skype in Mac

  • Open Terminal
  • type this in terminal $ sudo /Applications/Skype.app/Contents/MacOS/Skype /secondary

Compress image on wordpress via functions

  • Open function.php
  • add this code add_filter( 'jpeg_quality', create_function( '', 'return 80;' ) );

Here are all the Rails 5 (ActiveRecord migration) datatypes:

	:primary_key
	:string
	:text
	:integer
	:bigint
	:float
	:decimal
	:numeric
	:datetime
	:time
	:date
	:binary
	:boolean

Date and time Format meaning

  • %a - The abbreviated weekday name (“Sun”)
  • %A - The full weekday name (“Sunday”)
  • %b - The abbreviated month name (“Jan”)
  • %B - The full month name (“January”)
  • %c - The preferred local date and time representation
  • %d - Day of the month (01..31)
  • %H - Hour of the day, 24-hour clock (00..23)
  • %I - Hour of the day, 12-hour clock (01..12)
  • %j - Day of the year (001..366)
  • %m - Month of the year (01..12)
  • %M - Minute of the hour (00..59)
  • %p - Meridian indicator (“AM” or “PM”)
  • %S - Second of the minute (00..60)
  • %U - Week number of the current year, starting with the first Sunday as the first day of the first week (00..53)
  • %W - Week number of the current year, starting with the first Monday as the firstday of the first week (00..53)
  • %w - Day of the week (Sunday is 0, 0..6)
  • %x - Preferred representation for the date alone, no time
  • %X - Preferred representation for the time alone, no date
  • %y - Year without a century (00..99)
  • %Y - Year with century
  • %Z - Time zone name
  • %% - Literal “%” character
  • %e - Day of the month, without leading zero (1..31)
  • %-I %-d - You can remove leading Zeros this way as well. By just adding a - symbol.

Outpting any files using only terminal

eg: JSON to CSV

curl -u 60783dd23ef:X https://your-domain.com/v1/filename.json -O or curl -u 60783dd23ef:X https://your-domain.com/v1/filename.json -o mailbox.csv

downloading lots of files via terminal

for((i=1;i<=8;i++)); do curl -u xxxxxx:pass //your-domain.com/v1/filename.json?page=$i -o mailboxes-28303-conversations-page-$i.json; done

FQL facebook search by group name

SELECT gid, name, privacy, website, email
FROM   group
WHERE  CONTAINS("jobs")
AND    strpos(lower(name),lower("jobs")) >=0

Ruby Sample Scraper

require 'open-uri'
require 'nokogiri'

url = 'https://en.wikipedia.org/wiki/List_of_current_NBA_team_rosters'
page = Nokogiri::HTML(open(url))

# page.css('a') to get all a tags
# page.css('li.toclelev-3') to get content within li

page.css('td[style="text-align:left;"]').each do |line|
	puts line.text
end

Rails tips

this will be run in termminal window

Checking rake task

rake db -T -A

create a new rake task

rails generate task scraper scrape destroy_all_posts

where scraper is the name of the rake scrape and destroy_all_posts are the name of the task being rake.

Rake Command

rake db:create          # Create the database from DATABASE_URL or config/database.yml for the current Rails.env (use db:create:all to create all dbs in the config)
rake db:drop            # Drops the database using DATABASE_URL or the current Rails.env (use db:drop:all to drop all databases)
rake db:fixtures:load   # Load fixtures into the current environment's database
rake db:migrate         # Migrate the database (options: VERSION=x, VERBOSE=false)
rake db:migrate:status  # Display status of migrations
rake db:rollback        # Rolls the schema back to the previous version (specify steps w/ STEP=n)
rake db:schema:dump     # Create a db/schema.rb file that can be portably used against any DB supported by AR
rake db:schema:load     # Load a schema.rb file into the database
rake db:seed            # Load the seed data from db/seeds.rb
rake db:setup           # Create the database, load the schema, and initialize with the seed data (use db:reset to also drop the db first)
rake db:structure:dump  # Dump the database structure to db/structure.sql
rake db:version         # Retrieves the current schema version number

Migrations Tips

Remove Column

rails g migration RemoveColumnFromDatabaseTable 'first_name:string'

Rename Column

Create a Migration

rails g migration RenameNameToFirstNameInOrders

after that go to db/migrate/20160521114448_rename_name_to_first_name_in_orders.rb

and add this

class RenameNameToFirstNameInOrders < ActiveRecord::Migration

  def change
    rename_column :orders, :name, :first_name
  end

end

then rake db:migrate

Rake Db Reference 3.2 +

  • db:create creates the database for the current env
  • db:create:all creates the databases for all envs
  • db:drop drops the database for the current env
  • db:drop:all drops the databases for all envs
  • db:migrate runs migrations for the current env that have not run yet
  • db:migrate:up runs one specific migration
  • db:migrate:down rolls back one specific migration
  • db:migrate:status shows current migration status
  • db:rollback rolls back the last migration
  • db:forward advances the current schema version to the next one
  • db:seed (only) runs the db/seed.rb file
  • db:schema:load loads the schema into the current env's database
  • db:schema:dump dumps the current env's schema (and seems to create the db as well)
  • db:setup runs db:schema:load, db:seed
  • db:reset runs db:drop db:setup
  • db:migrate:redo runs (db:migrate:down db:migrate:up) or (db:rollback db:migrate) depending on the specified migration
  • db:migrate:reset runs db:drop db:create db:migrate

Update Database table using seed.rb

my_account_1 = Account.find_or_initialize_by(operator_id: "1")

my_account_1.update(
			operator_logo: '', 
			operator_name: 'Ruel Nopal', 
			business_name: 'RNopal Ltd.', 
			bus_name: 'Super Line', 
			business_address: 'Pasig City', 
			operator_id: '1',
			telephone: '7654321', 
			mobile: '0987654321')

Uploading files from local computer to remote location

scp your-files.zip root@xxx.x.xxx.xxx:/your/destination/folder

How to Change the number of icons in launchpad or Application

By default there are 7×5 icons (35 icons in total). You can change this to anything you want with a couple of simple commands in the terminal.

To show 100 icons (10×10), open terminal and type

defaults write com.apple.dock springboard-rows -int 10
defaults write com.apple.dock springboard-columns -int 10

To show 50 icons (5×10), open terminal and type

defaults write com.apple.dock springboard-rows -int 10
defaults write com.apple.dock springboard-columns -int 5

How to see files in linux command

a] ls command – list directory contents.

b] du command – estimate file space usage.

c] stat command – display file or file system status.

To determine the size of a file called /bin/grep, enter:

To Determine all storage size

df -h

output

Filesystem      Size  Used Avail Use% Mounted on
/dev/vda1        59G   44G   13G  77% /
devtmpfs        3.9G     0  3.9G   0% /dev
tmpfs           3.9G     0  3.9G   0% /dev/shm
tmpfs           3.9G  401M  3.5G  11% /run
tmpfs           3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/sda         99G   30G   64G  32% /home1
/dev/loop0      1.9G  3.2M  1.8G   1% /tmp
tmpfs           783M     0  783M   0% /run/user/0

Determine Current Folder size

du -sh *
du -hs * | sort -h

output

4.0K	backup
0	bin
229M	boot
44K	cldeploy
0	dev
43M	etc
0	lib
0	lib64
16K	lost+found
4.0K	media
4.0K	mnt
289M	opt
0	proc
4.0K	razor-agent.log
9.3M	root
73M	run
0	sbin
0	scripts
4.0K	srv
0	sys
128K	tmp
11G	usr
c2.5G	var

ls -l /bin/grep

output

-rwxr-xr-x 1 root root 175488 May 13  2012 /bin/grep

In the above output example, the 175488 is the size of the file. For a more user friendly output, pass the -h option to the ls command:

ls -lh /bin/grep

output

-rwxr-xr-x 1 root root 172K May 13  2012 /bin/grep

In the above output example, the 172K is the size of the file. The du command provides the same output in a more user friendly way and it hides all other details too:

du -h /bin/grep

output

172K	/bin/grep

Finally, stat command also provide file size:

stat /bin/grep

output

stat /bin/grep
  File: `/bin/grep'
  Size: 175488    	Blocks: 344        IO Block: 4096   regular file
Device: 900h/2304d	Inode: 5505033     Links: 1
Access: (0755/-rwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2013-06-10 01:31:37.520022359 +0530
Modify: 2012-05-13 18:17:28.000000000 +0530
Change: 2013-05-17 02:16:17.138033825 +0530

source: http://www.cyberciti.biz/faq/how-to-see-file-size-on-linux-unix/

How to limit page view wordpress

// Exit if accessed directly
if ( !defined( 'ABSPATH' ) ) {
	exit;
}

How to Force Backup WHM

/usr/local/cpanel/bin/backup --force

to monitor

tail -f /usr/local/cpanel/logs/cpbackup/{id}.logs

How to add php code inside terminal

make sure php-cli is install

$ echo "<?php phpinfo(); ?>" >> info.php

Find a string inside files ain all folders and its sub folder and list it in terminal

good for finding malware

grep -lr 'kdzooma' * >> list.txt

Remove __MACOSX/ in folder when zipping

zip -d your-archive.zip "__MACOSX*"

How to flush Cache in Mac using terminal

$ sudo dscacheutil -flushcache;sudo killall -HUP mDNSResponder; say cache flushed

Find files in terminal

$ find . -type f -name "dns"

Find folder in terminal

$ find / -name "dns"

list of all DNS record in WHM/cpanel

$ cd /var/named

How to to dump sql in terminal


#Dumping single db table
$ mysqldump --single-transaction -u db_user -p db_name db_table_name > sqldump.sql

#Dumping single database
$ mysqldump --single-transaction -u db_user -p db_name > sqldump.sql

How to Uploald sql in terminal

$ mysql -u username -p database_name < file.sql

Hide Desktop Icon for Mac

$ defaults write com.apple.finder CreateDesktop -bool false;killall Finder

Show Desktop Icon For Mac

Type in defaults write com.apple.finder CreateDesktop -bool true;killall Finder

Clean All Users Trash

find /home*/*/.trash/* -exec rm -rf {} \;

Upload image in Wordpress frontend using Advance Custom field (ACF)

if ( ! function_exists( 'wp_handle_upload' ) ) {
    require_once( ABSPATH . 'wp-admin/includes/file.php' );
}

//Upload company logo
$upload_overrides = array( 'test_form' => false );
// From File field
$organizer_img_upload = $_FILES['organizer_img_upload'];
$organizer_img_file_return = wp_handle_upload( $organizer_img_upload, $upload_overrides );



//file upload and get image id
if ($organizer_img_file_return) {
	$wp_upload_dir = wp_upload_dir();
	$attachment = array(
	'guid' => $wp_upload_dir['url'].'/'.basename($organizer_img_file_return['file']),
	'post_mime_type' => $organizer_img_file_return['type'],
	'post_title' => preg_replace('/\.[^.]+$/', '', basename($organizer_img_file_return['file'])),
	'post_content' => '',
	'post_status' => 'inherit'
	);
	$attach_id = wp_insert_attachment($attachment, $organizer_img_file_return['file']);

	// Make sure that this file is included, as wp_generate_attachment_metadata() depends on it.
	require_once( ABSPATH . 'wp-admin/includes/image.php' );

	// Generate the metadata for the attachment, and update the database record.
	$attach_data = wp_generate_attachment_metadata( $attach_id, $organizer_img_file_return['file'] );
	wp_update_attachment_metadata( $attach_id, $attach_data );

	
	// Add ACF image field
	update_field('company_logo', $attach_id, $post_id);
}

How to solve inner page 404 error ubunto

  1. go to cd /etc/apache2/sites-available find your virtualhost
  2. make sure this code is present
	<Directory /var/www/yourdomain.com/public_html>
            Options Indexes FollowSymLinks
            AllowOverride All
            Require all granted
        </Directory>

Create ssh-keygen with pem

ssh-keygen -m PEM -t rsa

Run Nodejs continuesly

$ node index.js && nohup -& (to run as a background process - no hiccup)