Configuring (and using) Suricata

http://resources.infosecinstitute.com/configure-use-suricata-threat-detection/

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Open tools for SysAdmins

http://opensourceforu.com/2018/03/top-10-open-source-tools-linux-systems-administrators/

Manjaro (CE) on a Macbook Pro (i3)

https://lobotuerto.com/blog/how-to-setup-manjaro-linux-i3-on-a-macbook-pro/

Ansible (basics) for admins

https://www.redhat.com/en/blog/system-administrators-guide-getting-started-ansible-fast

A Tor relay in Docker

https://kushaldas.in/posts/running-tor-relay-inside-a-docker-container.html

Regular expressions primer

https://hackaday.com/2018/03/09/linux-fu-regular-expressions/

Configuring Snort (and creating rules)

https://linuxhint.staging.wpengine.com/configure-snort-ids-create-rules/

How to get an A/A+ rating (NginX)

https://zurgl.com/nginx-how-to-get-an-a-or-a-rating-on-securityheaders-io/

Email self-hosting (NixOS, Vultr, NearlyFreeSpeech)

https://timput.com/posts/mailserver.html

Using SysRq on CentOS

https://www.thegeekdiary.com/how-to-use-sysrq-tool-in-centos-rhel

Logical volumes series (1)

https://thelinuxexperiment.com/working-with-logical-volumes-part-1/

Remote hard drive backups with rsync

https://www.addictivetips.com/ubuntu-linux-tips/make-a-remote-hard-drive-backup-linux/

Monitor multiple hosts simply

https://www.ostechnix.com/how-to-quickly-monitor-multiple-hosts-in-linux/

Let’s Encrypt with wildcard cert

https://balaskas.gr/blog/2018/03/14/lets-encrypt-wildcard-certificate/

Clonezilla on Xenial

http://www.elinuxbook.com/install-clonezilla-disk-cloning-software-imaging-software-in-ubuntu-16-04-a-best-disk-image-software-for-linux/

Set up (and configure) a mail server (2)

https://linuxize.com/post/install-and-configure-postfix-and-dovecot/