SuSE 15 SP3 BMR Restore and Disaster Recovery
by Ramses Soto-Navarro ramses@sotosystems.com, 8/16/2021
Overview
Rescue Boot
Rescue Network
Backup Rsync
Backup Squashfs
Recovery Format
Overview
Brief bulletpoints on BMR backup restore and disaster recovery for SuSE 15 SP3. The procedure is the same for the previous release SuSE 12 SP5. Audience is experienced Linux systems administrators.
Tripwire Installation for SuSE 15
by Ramses Soto-Navarro ramses@sotosystems.com, 7/26/2021
Overview
Installation
Generate Keys
Initialize
Check Files
Overview
Brief notes on how to install and run tripwire on SuSE Enterprise Linux SLE 15. Tripwire checksums critical files in a database. Afterward you can inspect the checksum for files that have changed or files that have been breached. So for example, files in /bin/ should never change unless an upgrade was performed; Tripwire can scan daily for delicate files changed; a good security intrusion detection software.
Custom Log Checker
by Ramses Soto-Navarro ramses@sotosystems.com, 4/27/2021
Overview
The Script
Crontab
Overview
Brief explanation of a log check bash script which alerts when there are too many log errors per day. It parses a set of words to search at the end of the day; counts the number of occurrences; then if a max number is surpassed, send an Email alert with a count of each set of words. A choice of sending via Email or displaying on console is provided.
Nagios Install on Red Hat 8
by Ramses Soto-Navarro ramses@sotosystems.com, 4/15/2021
Overview
Required Packages
Install Fping
Create Accounts
Install Nagios Core
Install Nagios Plugins
Configure Nagios
Configure Apache
Configure Email
Firewall Rules
Configure Nodes
Add Nodes to Monitor
Logrotate
Configure SNMP Defaults
Test Commands
Node Stress Test
OID List
TODO
Overview
Brief notes on Nagios install on Red Hat Linux 8.x. Provides: SNMP monitoring, Email alerts, web interface. The audience is experienced Linux administrators.
Borg Backup Notes
by Ramses Soto-Navarro, ramses@sotosystems.com
Overview
Install
Quick Start
Daily Script
List Archives
Extract Restore
Delete Archive
Prune
Mount Archive
Export Tarball
Install SSHFS
Remote Restore
Prune
Overview
Brief notes about Borg; an executable for backups with many cool features: deduplication, high compression, encryption, mountable archives, authentication security, offsite backups via SSH, BSD license. Follow the logic; for experienced Linux administrators.
Install
Download latest from: https://github.com/borgbackup/borg/releases
# cd /usr/local/bin # wget https://github.com/borgbackup/borg/releases/download/1.1.16/borg-linux64 # chmod 0755 borg-linux64 # ln -s borg-linux64 borg # borg -h