Linux

General

• Access Control Lists
• File Ownership Commands
• Mounting a CD/DVD Device
• Mounting an ISO Image
• Command-line CD Recording
• OpenSSH Passwordless Authentication
• RHEL/CentOS Local Repository Mirror
• Increasing Swap Space
• Device Management
• SSSD/Kerberos/LDAP Authentication
• Passwords
• Password Complexity
• RHEL Recover root Password
• List HBAs
• Let's Encrypt - Certbot

Storage Operations

• LV Bad Geometry/Unsuccessful LV Activation
• LV Resize Filesystem
• PV Resize
• PV Install
• PV Removal
• Extend Logical Volume and Filesystem
• LVM Cheat Sheet
• DISK Add New Volume from VMWare Host
• DISK Remove a Storage Device
• FS Repair a Corrupted Filesystem
• DM Resize a DM-Multipath Device
• VG Relocate to New Server

Package Management

• subscription-manager Commands
• Convert RHN Classic to Subscription Manger
• Repository Commands
• Remove Old Kernels

systemd

• Archlinux systemd
• How to Manage ‘Systemd’ Services and Units Using ‘systemctl’ in Linux

Networking

• Setup Teamed Interface
• netstat & ss Commands

Virtualization

• Register a Virtual Hypervisor

Resources

• RedHat Linux
• CentOS
• CentOS Software Vault
• Ubuntu
• Debian
• Archlinux
• Linux Cheat Sheets