Installing and configuring ownCloud

ownCloud – Web application for synchronization, sharing and remote storage of data in the “cloud”.

Perform the installation of ownCloud for example in Ubuntu:

sudo apt-get install owncloud

I noticed that in Ubuntu, at the time of installation I tested on Ubuntu 14.04.03 LTS, canceled the installation of ownCloud from the repository, so you can add a third party and install or update from it. We look at the sources https://software.opensuse.org/package/owncloud

On Ubuntu 14.04, for example, installation from a third-party repository is performed by the following commands:

sudo sh -c "echo 'deb http://download.opensuse.org/repositories/isv:/ownCloud:/community/xUbuntu_14.04/ /' >> /etc/apt/sources.list.d/owncloud.list"
sudo apt-get update
sudo apt-get install owncloud

The next step is to open the web interface http://server/owncloud in the browser and create the login and password for the administrator account, as well as specify the type of database to store the settings, accounts and other information owncloud.
For better performance, it’s better to use the mysql database, for this we will install the MySQL server and create it:

sudo apt-get install mysql-server
mysql -u root -p
create database owncloud;
grant all privileges on owncloud.* to owncloud@localhost  identified by 'ПАРОЛЬ';
exit

To be able to upload large files into owncloud, you will need to edit /etc/php5/apache2/php.ini by changing the upload_max_filesize and post_max_size in it, for example to 2048mb.

See also:
Install Nextcloud in Ubuntu

Allow insecure connections to POP3 / IMAP iRedMail

In order to be able to connect to POP3 / IMAP without STARTTLS, you need to open the Dovecot configuration file:

sudo nano /etc/dovecot/dovecot.conf

Edit the two parameters listed below:

disable_plaintext_auth=no
ssl=yes

To return the parameters of the secure connection to POP3S / IMAPS back:

disable_plaintext_auth=yes
ssl=required

After the changes in the Dovecot configuration, you need to restart it:

sudo /etc/init.d/dovecot restart

See also:
How to enable SMTP without SSL on port 25 in iRedMail / Postfix

Installing ISC DHCP for ABillS

Here is an example of the installation of the ISC DHCP server for ABillS in Ubuntu Server.

Switch to the root user:

sudo su

Install package:

apt-get install isc-dhcp-server
ln -s /usr/abills/Abills/modules/Dhcphosts/leases2db.pl /usr/abills/libexec/leases2db.pl

Run:

/usr/abills/libexec/leases2db.pl -d LEASES=/var/lib/dhcp/dhcpd.leases

Change owner of a file:

chown www-data /etc/dhcp/dhcpd.conf

Open the config.pl in the Editor:

nano /usr/abills/libexec/config.pl

Add options:

$conf{DHCPHOSTS_CONFIG}='/etc/dhcp/dhcpd.conf';
$conf{DHCPHOSTS_LEASES}='/var/lib/dhcp/dhcpd.leases';
$conf{DHCPHOSTS_RECONFIGURE}='/usr/bin/sudo /etc/init.d/isc-dhcp-server restart';

Open in the Editor:

nano /etc/sudoers

Add the string making the ability to run a service system:

www-data   ALL = NOPASSWD: /etc/init.d/isc-dhcp-server

Go to the Abills Web interface, open the menu "settings"-"IP (DHCP)"-"Network IP (DHCP) Network", add the network if needed, then "Show, reconfigure the dhcp" and "Reconfigure".

See if the isc-dhcp-server command:

/etc/init.d/isc-dhcp-server status

Logs are written to the file/var/log/syslog

You can also configure the export of DHCP history to see it in the “Report” – “DHCP History” menu.
To do this, make a link:

ln -s /usr/abills/Abills/modules/Dhcphosts/dhcp_log2db.pl /usr/abills/libexec/dhcp_log2db.pl

Separating DHCP logs into a separate file as I wrote in the article below and adding to the Startup script with the command:

tail -F /var/log/dhcpd.log | /usr/abills/libexec/dhcp_log2db.pl

See also my articles:
Installing and configuring a dhcp server, isc-in Ubuntu
Packet capturing with tcpdump