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The Linux bonding driver provides a method for aggregating multiple network interfaces into a single logical "bonded" interface. The behavior of the bonded interfaces depends upon the mode; generally speaking, modes provide either hot standby or load balancing services. Additionally, link integrity monitoring may be performed.

https://www.kernel.org/doc/Documentatio ... onding.txt

On Debian first install the ifenslave package, necessary to enable bonding:

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apt-get install ifenslave

Decide which bonding mode is desired ...

Letsencrypt (link) provides free SSL certificates for websites. Process of issuing certificate (and renewal) is greatly simplified by certbot scripts (former letsencrypt-auto) written in python.
Here we will install certbot on Centos 7 and issue SSL certificate for example.com/www.example.com running on Nginx.

Certbot installation instructions can be found at certbot.eff.org or at GitHub repo.
Certbot is packaged in the EPEL repository. Enable EPEL on your system and install Certbot:

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yum install epel-release
yum install certbot

...

speedtest-cli
Command line interface for testing internet bandwidth using speedtest.net

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# ./speedtest_cli.py
Retrieving speedtest.net configuration...
Retrieving speedtest.net server list...
Testing from MyProvider Net N/A. (10.10.10.10)...
Selecting best server based on latency...
Hosted by Burstfire Networks Ltd (London) [0.89 km]: 9.689 ms
Testing download speed........................................
Download: 641.44 Mbit/s
Testing upload speed..................................................
Upload: 318.96 Mbit/s

# ./speedtest_cli.py -h
usage: speedtest_cli.py [-h] [--bytes] [--share] [--simple] [--list]
[--server SERVER] [--mini MINI] [--source SOURCE]
[--timeout TIMEOUT] [--secure] [--version]

Command line ...

Authentic is Webmin/Usermin/Virtualmin/Cloudmin theme based on Bootstrap and Font Awesome
GitHub: qooob/authentic-theme

DBSake - (s)wiss-(a)rmy-(k)nif(e) for MySQL
https://github.com/abg/dbsake

Features

Parsing MySQL .frm files and output DDL
Filtering and transforming mysqldump output
Patching a my.cnf to remove or convert deprecated options
Deploying a new standalone MySQL "sandbox" instance
Decoding/encoding MySQL filenames
Managing OS caching for a set of files

https://www.percona.com/blog/2015/12/16/recovering-table-structure-from-frm-files-using-dbsake/

BorgBackup (short: Borg) is a deduplicating backup program. Optionally, it supports compression and authenticated encryption.

The main goal of Borg is to provide an efficient and secure way to backup data. The data deduplication technique used makes Borg suitable for daily backups since only changes are stored. The authenticated encryption technique makes it suitable for backups to not fully trusted targets.

GitHub borgbackup/borg

Installation instructions can be found at official documentation page.
For tests we ...

Fastsocket is a highly scalable socket and its underlying networking implementation of Linux kernel. With the straight linear scalability, Fastsocket can provide extremely good performance in multicore machines. In addition, it is very easy to use and maintain. As a result, it has been deployed in the production environment of SINA.

Fastsocket increases throughput of Nginx and Haproxy(measured by connections per second) by 290% and 620% on a 24-core machine, compared to the base CentOS-6.5 ...

Sometimes you my require to add custom root CA certificates to trusted list on your server.
In this example we will add Root Certificate and Intermediate Certificate from CAcert free community-driven Certificate Authority.

General solution can be found at their wiki, but it lacks details about update-ca-trust method.

First, we install ca-certificates package:

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yum install ca-certificates

Then enable dynamic CA configuration feature:

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update-ca-trust enable

Time to download root and intermediate certificates in PEM format:
wget ...

LibreNMS is an autodiscovering PHP/MySQL/SNMP based network monitoring which includes support for a wide range of network hardware and operating systems including Cisco, Linux, FreeBSD, Juniper, Brocade, Foundry, HP and many more.

LibreNMS - community-based GPL-licensed fork of Observium
View on GitHub

It`s easy if you have eix installed:

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eix -Jc