Memos

Useful OpenSSL Tips

Generate Public SSH Key From Private SSH Key

PXE netboot.xyz with Unifi UDM-Pro and Synology TFTP

Synology Storage Analyzer A data write error

Printing line numbers with cat and grep

Retrieve Existing Keytabs from FreeIPA

Using Healthchecks.io with systemd timers

Kill a hung SSH session

Octoprint Plugins

View Markdown from Terminal

Making a temporary home directory

Using yum with only the cache

Check SSH Key Fingerprints

Force chrony to update time

Update libvirt/KVM guest virtual machine templates

Reset and Clone libvirt/KVM guest virtual machines

Automatic DNS resolution for libvirt guests using a local domain

Clear systemd journal

Reset root password on RHEL7

Using screen as a serial console

Discover IPv6 Neighbors

Renew Expired GPG Keys

Set time with NTPd

Modify iptables rules

Grow LVM physical volume

Using ssmtp with FastMail

Signing GnuPG keys with caff

Configuring ipmi using ipmitool

Reinstall the Kernel with yum

Have dovecot logins update lastlog

SELinux Permissive Domains

Code Sample

Change network device name after restore

Interface teaming with nmcli

Hammer notes

RPM Notes