LPIC-1: Linux Administrator (101 and 102 exams)
ISBN: 9781644591857
LPI Linux Essentials (010-160)
ISBN: 9781644591925
CompTIA Linux+ (XK0-005)
ISBN: 9781644594025
CompTIA Server+
ISBN: 9781644593424
Windows Server 2019
ISBN: 9781644592731