Traefik is a reverse proxy / load balancer that’s easy, dynamic, automatic, fast, full-featured, open source, production proven, provides metrics, and integrates with every major cluster technology.
In this tutorial I will share my Traefik docker-compose.yml setup files and how to use them.
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DevOps/IT Specialist, Musician.
IT Manager – Faculty of Exact Sciences, Bar-Ilan University
Personal Website
This tutorial provides an example how to Setup BIND DNS Server on CentOS 7.
This example is suited for secure private networks behind a gateway.
DevOps/IT Specialist, Musician.
IT Manager – Faculty of Exact Sciences, Bar-Ilan University
Personal Website
This tutorial provides an example of Apache Active Directory Authentication using the Authz LDAP module.
Apache and SSL settings are not in the scope of this tutorial.
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DevOps/IT Specialist, Musician.
IT Manager – Faculty of Exact Sciences, Bar-Ilan University
Personal Website
“SELinux is a security enhancement to Linux which allows users and administrators more control over access control.” (selinuxproject.org”
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DevOps/IT Specialist, Musician.
IT Manager – Faculty of Exact Sciences, Bar-Ilan University
Personal Website
In the next tutorial I will show you how to add the fedora EPEL repository to your CentOS 7 installation.
“Access Control List (ACL) provides an additional, more flexible permission mechanism for file systems.
It is designed to assist with UNIX file permissions.
ACL allows you to give permissions for any user or group to any disc resource.” (Wikipedia)
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DevOps/IT Specialist, Musician.
IT Manager – Faculty of Exact Sciences, Bar-Ilan University
Personal Website
“The nc (or netcat) utility is used for just about anything under the sun involving TCP, UDP, or UNIX-domain sockets.
It can open TCP connections, send UDP packets, listen on arbitrary TCP and UDP ports, do port scanning, and deal with both IPv4 and IPv6. Unlike telnet nc scripts nicely, and separates error messages onto standard error instead of sending them to standard output, as telnet does with some.” (NetCat Manual)
DevOps/IT Specialist, Musician.
IT Manager – Faculty of Exact Sciences, Bar-Ilan University
Personal Website
Linux chmod has a few options that can make your life a lot easier when managing a shared storage.
The most needed are chmod suid sgid sticky bit.
Also the impact of each one is different between files and folders.
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DevOps/IT Specialist, Musician.
IT Manager – Faculty of Exact Sciences, Bar-Ilan University
Personal Website
xrdp is a free open-source remote desktop server for Linux.
Installing xrdp on CentOS might be a little tricky since CentOS repositories does not contain the xrdp package.
Even the EPEL repository (Extra Packages Enterprise Linux) only contains an old version of xrdp.
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DevOps/IT Specialist, Musician.
IT Manager – Faculty of Exact Sciences, Bar-Ilan University
Personal Website
“iptables is a user space application program that allows a system administrator to configure the tables provided by the Linux kernel firewall (implemented as different Netfilter modules) and the chains and rules it stores.
Different kernel modules and programs are currently used for different protocols; iptables applies to IPv4, ip6tables to IPv6, arptables to ARP, and ebtables to Ethernet frames.”
In this tutorial I will give a few essential examples of how to use iptables on CentOS
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DevOps/IT Specialist, Musician.
IT Manager – Faculty of Exact Sciences, Bar-Ilan University
Personal Website
tr and sed are very powerful stream and character manipulation commands, Each has its own advantage with string manipulation.
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DevOps/IT Specialist, Musician.
IT Manager – Faculty of Exact Sciences, Bar-Ilan University
Personal Website
Linux fg bg commands usage and examples using CTRL-Z and jobs command.
Move a process between background and foreground modes with paused and running states.
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DevOps/IT Specialist, Musician.
IT Manager – Faculty of Exact Sciences, Bar-Ilan University
Personal Website
