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OpenLDAP Server Configuration on RHEL7/Centos7 Lightweight Directory Access Protocol  ( LDAP  in short) is an industry-standard, lightweight, widely used set of protocols for accessing directory services. A directory service is a shared information infrastructure for accessing, managing, organizing, and updating everyday items and network resources, such as users, groups, devices, email addresses, telephone numbers, volumes, and many other objects. The  LDAP  information model is based on entries. An entry in a LDAP directory represents a single unit or information and is uniquely identified by what is called a  Distinguished Name  ( DN ). Each of the entry’s attributes has a type and one or more values. An attribute is a piece of information associated with an entry. The types are typically mnemonic strings, such as “ cn ” for common name, or “ mail ” for the email address. Each attribute is assigned one or more values consisting in a space-separated lis

Configure Software RAID 1 in Linux About RAID 1? RAID-1 is usually referred to as "mirroring." Each child object in a RAID-1 region contains an identical copy of the data in the region. A write to a RAID-1 region results in that data being written simultaneously to all child objects. A read from a RAID-1 region can result in reading the data from any one of the child objects. Child objects of a RAID-1 region do not have to be the same size, but the size of the region will be equal to the size of the smallest child object. Requirements Minimum Two number of disks are allowed to create RAID 1, but you can add more disks by using twice as 2, 4, 6, 8. To add more disks, your system must have a RAID physical adapter (hardware card). Need to Install ‘ mdadm ‘ package: The mdadm is a small program, which will allow us to configure and manage RAID devices in Linux. check my youtube video " Creating RAI