DevOps Engineer
DevOps is a set of practices that automates the processes between software development and IT teams, in order that they can build, test, and release software faster and more reliably. The concept of DevOps is founded on building a culture of collaboration between teams that historically functioned in relative siloes.
Make a backup of the existing SSL key and certificate file
cd /etc/pki/dovecot cp -a certs/dovecot.pem certs/dovecot.pem.old cp -a private/dovecot.pem private/dovecot.pem.old
Create the new SSL certificate for two years:
openssl genrsa -out private/dovecot.pem 1024 openssl req -new -x509 -key private/dovecot.pem -out certs/dovecot.pem -days 730
Restart Dovecot and Postfix
sudo systemctl
DevOps (a clipped compound of “development” and “operations”) is a set of software development practices[failed verification] that combines software development (Dev) with information technology operations (Ops) to shorten the systems development life cycle while delivering features, fixes, and updates frequently in close alignment with business objectives.… Read more
When you run MySQL commands MySQL, mysqlcheck, mysqdump and psql, psqldump, etc; they will pick username & password from this file if you do not provide them as argument (-u and -p). It can save you time.
Of course, if you specify username and password explicitly as part of the … Read more
This article explains the most commonly used Email protocols on the internet – POP3, IMAP, and SMTP
587 vs. 465
These port assignments are specified by the Internet Assigned Numbers Authority (IANA):
Port 587: [SMTP] Message … Read more
wget https://github.com/git/git/archive/master.zip unzip master.zip && rm master.zip cd master make configure ./configure --prefix=/usr make install
Uncomment the required php version.
yum install -y http://rpms.remirepo.net/enterprise/remi-release-7.rpm yum install -y yum-utils # yum-config-manager --enable remi-php70 # yum-config-manager --enable remi-php71 # yum-config-manager --enable remi-php72 yum-config-manager --enable remi-php73 yum -y install php # php-mcrypt php-cli php-gd php-curl php-mysql php-ldap php-zip php-fileinfo php -v
When you run MySQL commands MySQL, mysqlcheck, mysqdump and psql, psqldump etc; they will pick username & password from this file if you do not provide them as argument (-u and -p). It can save you time.
Of course, if you specify username and password explicitly as part of the … Read more
fail2Ban is a very handy tool to prevent a lot of unwanted traffic from consuming bandwidth on your servers. It’s a minimal and relatively simple IDS Type Tool that comes with some predefined filters to automatically lockout potentially dangerous or bandwidth-consuming type attacks.
/etc/fail2ban/filter.d/custom.conf
[Definition]