On Ubuntu systems, the Certbot team maintains a PPA. Once you add it to your list of repositories all you’ll need to do is apt-get the following packages. $ sudo apt-get update $ sudo apt-get install software-properties-common $ sudo add-apt-repository ppa:certbot/certbot $ sudo apt-get update $ sudo apt-get install python-certbot-apache Reference: https://help.ubuntu.com/community/Repositories/Ubuntu#Adding_PPAs
protect zimbra from memcached attack
Zimbra uses memcached and if not properly configured could lead to a vulnerable system. If you want to read more on memcached attack read this: https://blog.cloudflare.com/memcrashed-major-amplification-attacks-from-port-11211/ How to resolve this vulnerability in 3 steps: Enable firewall on your server Setup zimbra specific rules Bind memcached to localhost Deny memcached port from localhost Let’s start.
centralised vs decentrilised vs distributed
This is nice short article clarifying the terms centralised, decentrilised and distributed with great examples. https://medium.com/@bbc4468/centralized-vs-decentralized-vs-distributed-41d92d463868
remove banned ip from microsoft ban lists
This works for hotmail.com, live.com, outlook.com and possibly other microsoft related email addresses. Use this form to request removal: http://go.microsoft.com/fwlink/?linkid=614866 Make sure you ‘re registered: https://postmaster.live.com/snds/data.aspx This was an old one and does not seem to work anymore: https://support.live.com/eform.aspx?productKey=edfsmsbl3&ct=eformts&scrx=1 Source: https://answers.microsoft.com/en-us/outlook_com/forum/oemail-osend/hotmailoutlook-blacklist-removal-form/86c71c17-80c9-48e9-b822-1d3678f19673
osticket and self-signed-certificates on email server
This has to do with PHP >= 5.6, where php changed its behavior with self signed certificates. This has caused osticket users to keep old PHP versions in order to operate with self signed mail servers. But actually the fix is relatively simple: Go to {osTicket directory}/include/pear/Net/SMTP.php line 173 and change this line: ‘ssl’ => array(‘verify_peer_name’ => false)… Continue reading osticket and self-signed-certificates on email server
rename mysql database using command line
mysqladmin -u username -p create NEW_DB_NAME mysqldump -u root -pPASSWORD OLD_DB_NAME|mysql -u root -pPASSWORD NEW_DB_NAME
rsync including hidden files and differences with scp
rsync -av –progress src/ [email protected]:dest/ scp should also do the job but rsync is better scp -rp src [email protected]:dest/ Nice explanation about the differences can be found here: http://stackoverflow.com/questions/20244585/how-does-scp-differ-from-rsync — scp basically reads the source file and writes it to the destination. It performs a plain linear copy, locally, or over a network. rsync also… Continue reading rsync including hidden files and differences with scp
laravel 5 and language set locale
https://mydnic.be/post/laravel-5-and-his-fcking-non-persistent-app-setlocale
how to add a second erpnext instance on ubuntu
Assuming you have followed my previous guide on installing erpnext on a fresh ubuntu instance (http://blog.grs.gr/?p=518&lang=en), we will show you how to install a second site on the same server (DNS based multitenancy).
how to install erpnext on ubuntu
This guide is based on https://github.com/frappe/bench, and is tested a couple of times against ubuntu 14.04/64. Login as root with ssh. Optionally: apt-get update apt-get upgrade dpkg-reconfigure tzdata apt-get install nano Add a user (erpnext for our example). adduser erpnext Store password in a safe place for later use. visudo (to grant erpnext user sudo privileges,… Continue reading how to install erpnext on ubuntu