Gnomon is an island. - John Donne, 1624

The UNIX Way

Author:

Dimitry Dukhovny

UNIX is often the OS for geeks

UNIX is modular, extensible, and designed logically, but it is not a panacea! Its supporting culture is an ideological battleground that reads more like Plato’s Dialogues than like a technical history.

Note

To donate to the maintenance of these pages, do send BTC to bc1qkw0pp78kv67zrgp8xds7qrqen7mhlz0rs5p8p5

The UNIX Way sub-pages

• UNIX Management
  • Networking
  • Patches and Updates
  • Trouble: Stale process or process with runaway threads
  • Trouble: My process claims a file is not found
  • Trouble: My process claims it is missing a library
• Setting up HA for arbitrary services
  • Preparing the system
  • HA Proxy configuration
  • Keepalive Daemon configuration
• Openssh tips and tricks
  • Using keys to pivot around your environment
  • Disseminate SSH keys
  • Fetch keys from AWS Secrets
  • Trouble: failed login with no password prompt
  • Trouble: logins are painfully slow
  • Trouble: key file is too open or has wrong permissions
• Wifi Nuisances
  • libpcap missing netlink
• Web Server Notes
  • Using Apache2 with SSL as a Proxy for an application service
  • Receiving uploads with a web form using PERL CGI
• Ansible Code Promotion in a Shared Hosting Environment
  • Structure of a Role
  • Sample Web Server Role
  • Playbooks
  • Ansible configuration
  • Run the Playbook
• Name Resolution in UNIX
  • Troubleshooting DNS
  • Troubleshooting Installed Certificates
• F5 Notes
  • Creating a simple pool in TMSH
• Redhat and Centos kernel panic after yum update
  • When the kernel panic hits
  • The unfoxtrot.sh script
• Build a PXE Boot Server
  • Required packages under Centos/RHEL/Fedora
  • Stage OS disk
  • Web server
  • OS stage
  • Services
• Tricks with Containers and Small VMs
  • Run GUI Software on Your Headless UNIX Box
• Write DVDs with Common Linux Tools
  • Check the state of all inserted CDs and DVDs
  • Create an ISO
  • Mount an ISO
  • Burn an ISO to CD or DVD
  • Make an ISO Boot from USB Drive
• Openvpn in a VM or Container
  • Configuration Notes
  • Running Squid
  • Running Openvpn
• Proxmox Notes
  • OS Images
  • Cluster Death
  • Fix a running container
  • Integrate with LDAP
  • Endnotes
• Installing FreeIPA
  • Installation steps
  • Operations
  • Endnotes
• VPS Survival Guide
  • Email security
  • Network security
• Greenbone / Openvas scanning
  • Usage
  • Troubleshooting
• Logical Volume Management
  • Why LVM
  • LVM Basics