50 Chapter 4. Red Hat Network WebsiteThe System Groups list contains several columns for each group:• Select — Enables you to add groups to the System Set Manager. To select groups, mark theappropriate checkboxes and click the Updatebutton below the column. Selected groups are addedto the System Set Manager. After adding groups to the System Set Manager, you can use it toperform actions on them simultaneously. To add an intersection of groups, select them and click theWork with Intersection button. To add a union of groups, select them and click the Work withUnion button. Refer to Section 4.4.4 for details.• Status — Shows which type of Errata Alerts are applicable to the group or confirms that it is up-to-date. Clicking on a group’s status icon takes you to the Errata tab of its System Group Detailspage. Refer to Section 4.4.3.3 for more information.The status icons call for differing degrees of attention:• — Critical Errata available, update strongly recommended• — Updates available and recommended• — Systems within group not checking in properly• — Systems within group not entitled to any update service• — All systems within group are up-to-date• Group Name — The name of the group as configured during its creation. The name should beexplicit enough to easily differentiate between it and other groups. Clicking on the name of a grouptakes you to Details tab of its System Group Details page. Refer to Section 4.4.3.3 for moreinformation.• Systems — Total number of systems contained by the group. Clicking on the number takes you tothe Systems tab of the System Group Details page for the group. Refer to Section 4.4.3.3 for moreinformation.• Use in SSM — Clicking the Use Group button in this column loads the group from that row andlaunches the System Set Manager immediately. Refer to Section 4.4.4 for more information.4.4.3.1. Creating GroupsTo add a new system group, click the create new group button on the top-left corner. Type a nameand description and click the Create Group button. Make sure you use a name that clearly sets thisgroup apart from others. The new group will appear in the System Groups list.4.4.3.2. Adding and Removing Systems in GroupsIn the System Groups list, click the name of the group to receive the systems. This will take you tothe System Group Details page. Once there, click the Target Systems tab and select the systems tobe added to this group. Although all entitled systems should be listed, only systems at the Enterpriseservice level can be selected for addition. After selecting all of the systems to be added, click the AddSystems button on the bottom right-hand corner of the page. The new systems will then be shown onthe group’s Systems tab.To remove systems from groups, use the Groups tab of the System Details page. Refer to Section4.4.2.6 for instructions.