kolunar

To enable the slow query log in MySQL, follow these steps:

1). Log in to your server using SSH.

2). At the command line, type the following command:
mysql -u root -p

3). Type the MySQL root password.

4). To enable the slow query log, type the following command at the mysql> prompt:

kolunar

Ref: http://www.indiabix.com/java-programming/declarations-and-access-control/

Access modifiers dictate which classes, not which instances, may access features.
Methods and variables are collectively known as members. Method and variable members are given access control in exactly the same way.

private 
    makes a member accessible only from within its own class

protected 
    makes a member accessible only to classes in the same package or subclass of the class

kolunar

+--------------------+
|	Feature   |
+--------------------+	
	Start a new feature
	|- Development of new features starting from the 'develop' branch.

	
	Finish up a feature
	|- Finish the development of a feature.
		|- Merges the feature branch into 'develop'

kolunar

Command to display Memory usage, Disk Usage and CPU Load
========================================================
free -m | awk 'NR==2{printf "Memory Usage: %s/%sMB (%.2f%%)\n", $3,$2,$3*100/$2 }'
df -h | awk '$NF=="/"{printf "Disk Usage: %d/%dGB (%s)\n", $3,$2,$5}'
top -bn1 | grep load | awk '{printf "CPU Load: %.2f\n", $(NF-2)}' 

# should also try monit

kolunar

Ubuntu-12-04
https://www.digitalocean.com/community/tutorials/how-to-install-and-use-memcache-on-ubuntu-12-04

Ubuntu-14-04
https://www.digitalocean.com/community/tutorials/how-to-install-and-use-memcache-on-ubuntu-14-04

Read More:
https://www.digitalocean.com/community/tags/caching?type=tutorials

=======================================================

kolunar

mysqldbcopy is part of mysql-utilities.

apt-get install mysql-utilities (if not yet installed)

Usage: mysqldbcopy --source=user:pass@host:port:socket --destination=user:pass@host:port:socket orig_db:new_db

Example:
mysqldbcopy --source=user_name:password@localhost:3306 --destination=user_name:password@localhost:3306 mddb:mddb_demo

Working Example:

kolunar

When you see PHP Warning: something like 
"failed to open stream: Too many open files in /var/www/...
You need to check open file limit as below:

$ ulimit -n
4096

Change the following lines in the file: /etc/security/limits.conf
* soft nofile 4096
* hard nofile 4096

kolunar

First, check "$ ulimit -a".
Go to /etc/security/limits.conf and add the two lines described below:

*                soft    nofile          10240
*                soft    nproc           10240

Reboot system or add following line to the end of /etc/pam.d/common-session:

session required pam_limits.so

kolunar

1. mkdir /var/www/mydomain.com
2. mkdir /var/www/mydomain.com/html
3. useradd <-username>
4. passwd <-username>
5. chown –R <-username> /var/www/mydomain.com
5. groupadd <-groupname>
6. gpasswd -a <-username> <-groupname>
7. chgrp -R <-groupname> /var/www/mydomain.com
8. chmod -R g+rw /var/www/mydomain.com

kolunar

Ref: https://www.digitalocean.com/community/tutorials/how-to-set-up-mod_rewrite-for-apache-on-ubuntu-14-04
	
Ref: https://www.digitalocean.com/community/tutorials/how-to-set-up-mod_rewrite

sudo a2enmod rewrite
sudo service apache2 restart

sudo nano /etc/apache2/sites-enabled/000-default.conf

Follow the instructions from the link given above