Linux – Page 35

IPTables rules for DNS

Suppose the default INPUT DROP and a DNS server is installed, now I will give an example of IPTables rules so that clients can access the DNS server.

To open the DNS port in IPTables, let’s execute the rule:

Script to send SMS via Goip4 gateway for ABillS

I will give an example of a PHP script to which I send SMS messages through the GoIP4 gateway.

First, we choose tariffs with only monthly charges:

Installing and configuring GoIP SMS server

For example, setting up a GoIP SMS server in Ubuntu Server 14.04 LTS x64.
Switch immediately to root user:

How to update accel-ppp

I will give an example of updating the accel-ppp, the commands need to be executed as root user.

On the test, I install the ABillS billing system in Ubuntu Server 16.04 using an installer.
I note that the installer can install older versions of components such as Accel-ppp, so I recommend installing everything manually.
See also my article – Installing and configuring the billing system ABillS

Let’s start the automatic installation, download and unpack the archive with the installation script:

sudo apt-get install unzip wget
wget https://github.com/nabat/AInstall/archive/master.zip
unzip master.zip

Continue reading “Automatic installation ABillS”

Zabbix notifications by phone via Asterisk

One night at the station, the air conditioners turned off and the temperature started to rise, naturally, I received email notifications on the phone, but since it was night, I only saw them in the morning, so it was necessary for such an emergency to quickly make the possibility of phone call notifications.

Shredding data with Shred

Shred – allows you to overwrite the specified file with random data in order to ensure, if necessary, the more difficult process of recovery or the impossibility of data recovery.
On some file systems, data deletion is not guaranteed and the use of shred may not be effective.

The list of possible arguments:
Help program:

--help
man shred

Continue reading “Shredding data with Shred”

Using wipe in Linux

wipe – utility for secure full erasing of information.

Install command in Linux Ubuntu/Debian:

sudo apt-get install wipe

I will describe some startup keys:
-f Disable confirmation requests.
-r Recursively Removes all subdirectories, symbolic links are not touched.
-c If the rights of the directory are read-only, then they will be changed to write.
-i Detailed information mode.
-s Quiet mode, most messages are not displayed.
-q Fast mode, directories are overwritten with random data 4 times.
-Q The number of rewrite cycles. Standard 4.
-a Stop execution on error.
-R Install a random device.
-l Specify the size of the device block, for example when using floppy disks, etc.
-D Follow symbolic links, they don’t get touched by default.
-v Displays the version of the program.
-h Display help.

Continue reading “Using wipe in Linux”

Install phpMyAdmin

phpMyAdmin is a web application written in PHP that allows you to administer MySQL databases through a browser.

The easiest way to install phpMyAdmin is to download the archive with the latest version from the official website www.phpmyadmin.net and unpack it into the desired www directory, then you can open http://HOST/phpmyadmin/setup/ in the browser and follow the instructions. After that, move the config.inc.php file to the phpmyadmin root directory and close access to /setup/ or delete it altogether.
Continue reading “Install phpMyAdmin”

Installing and using Netcat

Netchat is a utility that allows you to establish a TCP/UDP connection and perform data transfer.