Linux

General

• Access Control Lists
• 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
• Password Complexity

Storage Operations

• LV Bad Geometry/Unsuccessful LV Activation
• LV Resize Filesystem
• PV Resize
• PV Install
• PV Removal
• 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

Red Hat Enterprise Linux

• subscription-manager Commands
• Register a Virtual Hypervisor
• Convert RHN Classic to Subscription Manger
• Enable a Repository

systemd Reference

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

Resources

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