46 Chapter 4. Red Hat Network Website4.4. SystemsIf you click the Systems tab on the top navigation bar, the Systems category and links appear. Thepages in the Systems category allow you to select systems so that you can perform actions on themand create System Profiles.4.4.1. OverviewThe Overview page provides a summary of your systems, including their status, number of associatedErrata and packages, and entitlement level. Clicking on the name of a system takes you to its SystemDetails page. Refer to Section 4.4.2.6 System Details for more information.Clicking the View System Groups link at the top of the Overview page takes you to a similar sum-mary of your system groups. It identifies group status and displays the number of systems contained.Clicking on the number of systems takes you to the Systems tab of the System Group Details page,while clicking on the system name takes you to the Details tab. Refer to Section 4.4.3.3 System GroupDetails for more information.You can also click the Use Group button in the System Groups section of the Overview page to godirectly to the System Set Manager. Refer to Section 4.4.4 System Set Manager for more information.4.4.2. SystemsAs shown in Figure 4-3, the Systems page displays a list of all your registered systems. The Systemslist contains several columns of information for each system:• Select — Update-entitled systems cannot be selected. To select systems, mark the appropriatecheckboxes and click the Update List button below the column. Selected systems are added tothe System Set Manager. After adding systems to the System Set Manager, you can use it toperform actions on them simultaneously. Refer to Section 4.4.4 System Set Manager for details.• Status — Shows which type of Errata Alerts are applicable to the system or confirms that it isup-to-date. Some icons are linked to pages providing resolution. For instance, the standard Updatesicon is linked to the Upgrade subtab of the packages list, while the Critical Updates icon goesdirectly to the Update Confirmation page. Also, the Not Checking In icon is linked to instructionsfor resolving the issue, while the Unentitled icon goes to the Buy Now page, if the user is anOrganization Administrator.• — System is up-to-date• — Critical Errata available, update strongly recommended• — Updates available and recommended• — System is locked; Actions prohibited• — Updates have been scheduled• — System not checking in properly (for 24 hours or more)• — System not entitled to any update service• Errata — Total number of Errata Alerts applicable to the system.• Packages — Total number of package updates for the system. Includes packages from Errata Alertsas well as newer packages that are not from Errata Alerts. For example, if a system is subscribedto the Red Hat Enterprise Linux 2.1 i386 channel that contains version 2.5.4 of a package because