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Wednesday, April 29, 2015

Disable PING replies on Linux

You may want to disable ping replies for many reasons, may be for a security reason, or to avoid network congestion.

Disable ping reply Temporarily

# echo "1" >  /proc/sys/net/ipv4/icmp_echo_ignore_all

Also, to enable the ping reply back, set the value to “0″ as shown below.

# echo "0" >  /proc/sys/net/ipv4/icmp_echo_ignore_all

Tuesday, April 28, 2015

How-To: Recover root password under linux with single user mode

It happens sometime that you can't remember root password. On Linux, recovering root password can be done by booting Linux under a specific mode: single user mode.
This tutorial will show how to boot Linux in single user mode when using GRUB and finally how to change root password.

During normal usage, a Linux OS runs under runlevels between 2 and 5 which corresponds to various multi-user modes. Booting Linux under runlevel 1 will allow one to enter into a specific mode, single user mode. Under such a level, you directly get a root prompt. From there, changing root password is a piece of cake.

Friday, April 17, 2015

Resetting ELASTIX VOIP Server

Log on to your elastix voip server n use your root accaunt
type  :





sqlite3 /var/www/db/acl.db "UPDATE acl_user SET md5_password='`echo -n newpassword|md5sum|cut -d' ' -f1`' WHERE name='admin'" 

Replace newpassword with the password you want to use for the admin login.

or to reset the password to “password” you can use the following command:

sqlite3 /var/www/db/acl.db "UPDATE acl_user SET md5_password='5f4dcc3b5aa765d61d8327deb882cf99' WHERE name='admin'"

done
- FIN -

Wednesday, February 25, 2015

Mengatasi permasalahan import size limit pada phpmyadmin

Terkadang kita memiliki file .sql dengan ukuran yang besar dikarenakan banyaknya data yang ada saat melakukan backup database.
Pada saat melakukan importing data menggunakan PHPMYADMIN maka yang terjadi adalah kesalahan pada limitasi data

Wednesday, February 11, 2015

Membangun VPN SERVER UBUNTU

Virtual Private Network atau singkatnya VPN adalah kumpulan berbagai jaringan publik untuk kemudian digabungkan menjadi 1 jaringan yang bersifat private untuk bisa saing berkomunikasi


                                  Skema VPN

Step by Step install VPN SERVER UBUNTU
Disini kita menggunakan OpenVPN sebagai kasusnya. yang sudah mendukung SSL VPN dengan UBUNTU 12.04 sebagai OS nya

Monday, February 9, 2015

Problem restart Apache "Could not reliably determine the server's fully qualified domain name"

Sering kali bagi sebagian pengguna pemula linux mengalami kebingungan ketika melakukan restart pada Apache

-- UBUNTU 14.04 --
riardian@server:/home/riardian# etc/init.d/apache2 restart

Pesan Error :

Restarting web server apache2
apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName
... waiting apache2:
Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName

Pesan error tersebut bukanlah kesalahan terhadap apache kita melainkan sebuah warning karena server kita belum melakukan seting FQDN (Fully Qualifed Domain Name) yaitu penamaan secara lengkap pada domain kita.

Solusi : 
1. Edit file berikut httpd.conf 
# vim /etc/apache2/httpd.conf 

Thursday, January 22, 2015

Mengganti Document Root UBUNTU

Pada proses instalasi pertama webserver biasanya Document Root berada di lokasi defaultnya yaitu  di /var/www. Sangat disarankan untuk memindah document root tersebut ke luar dari sistem file dikarenakan apabila terjadi upgrade sistem maka direktori tersebut akan di overwrite oleh sistem itu tersebut. Dengan kata lain akan hilang karena proses upgrade dan juga disarankan memisahkan direktori /home dan dan /.

Langkah langkah sebagai berikut :
1. Masuk pada konsol dengan permission root
riardian@server:~$ sudo su
[sudo]  password for riardian :
riardian@server:/home/riardian#

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