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Access control lists (ACLs) Linux

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Introduction to the management of ACLs (Access Control List) on Linux Access control list (ACL) provides an additional, more flexible permission mechanism for file systems. It is designed to assist with UNIX file permissions. ACL allows you to give permissions for any user or group to any disc resource. Think of a scenario in which a particular user is not a member of group created by you but still you want to give some read or write access, how can you do it without making user a member of group, here comes in picture Access Control Lists, ACL helps us to do this trick. Basically, ACLs are used to make a flexible permission mechanism in Linux. Installing ACL: Before using ACLs for a file or directory, install the acl package: Redhat: yum install acl SUSE: zypper install acl ubuntu: apt-get install acl Know when a file has ACL attached to it: It is very easy to know when a file has attached ACL to it. ls -ld command would produce a output as shown below.
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Red Hat Certified Systems Administrator – RHCSA (EX200) Ex@m practice 2022

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Step-by-Step Install and Configure OpenLDAP on RHEL7/CentOS 7 Linux

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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
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Creating RAID-0 (Stripe) in Linux

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Creating RAID-0 (Stripe) on ‘Two Devices’ Using ‘mdadm’ Tool in Linux About RAID-0   RAID-0 is usually referred to as “striping.” This means that data in a RAID-0 region is evenly distributed and interleaved on all the child objects. For example, when writing 16 KB of data to a RAID-0 region with three child objects and a chunk-size of 4 KB, the data would be written as follows: 4 KB to object 0 4 KB to object 1 4 KB to object 2 4 KB to object 0 RAID 0 has High Performance. Zero Capacity Loss in RAID 0. No Space will be wasted. Zero Fault Tolerance ( Can’t get back the data if anyone of disk fails). Write and Reading will be Excellent. Requirements The minimum number of disks is allowed to create RAID 0 is  2 , but you can add more disk but the order should be twice as 2, 4, 6, 8. If you have a Physical RAID card with enough ports, you can add more disks. Install ‘ mdadm ‘ package: The mdadm is a small program, which will allow
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