Deepak Prasad

Configure OpenLDAP client authentication with SSSD, authselect, StartTLS, and automatic home directories on RHEL, Rocky Linux, AlmaLinux, Oracle Linux, and CentOS Stream.

OpenLDAP vs Active Directory in plain language: LDAP protocol vs directory services, OpenLDAP vs LDAPS, Samba AD vs Microsoft AD, cost, GPO, Kerberos, Linux integration, and when to choose each.

In this tutorial we will cover the steps to install and configure OpenLDAP from scratch and then use the OpenLDAP server as a central authentication server

OpenLDAP is an open-source implementation of the Lightweight Directory Access Protocol (LDAP). It's widely used for managing directory information, providing

Migrate OpenLDAP configuration, schemas, directory data, TLS files, and client endpoints to a new RHEL, Rocky Linux, AlmaLinux, Oracle Linux, or CentOS Stream server.

Configure OpenLDAP multi-provider or multi-master replication with server IDs, accesslog, delta-syncrepl, StartTLS, MirrorMode, and conflict testing on RHEL-family Linux.

Configure one-way OpenLDAP provider-consumer replication with Syncrepl and StartTLS on RHEL-based Linux, including Rocky and AlmaLinux.

Configure OpenLDAP TLS on RHEL, Rocky Linux, AlmaLinux, Oracle Linux, and CentOS Stream using a private CA, StartTLS, LDAPS, and cn=config.

Install OpenLDAP 2.6 on RHEL-based Linux, configure MDB with cn=config, create the base DIT, and verify local and remote LDAP searches.

Configure OpenLDAP with TLS certificates on Ubuntu . Secure LDAP connections with TLS/SSL. Create our own CA and sign our certificate to use it with LDAP.

Learn the steps to install and configure OpenLDAP on Linux using ldapmodify and cn=config database. Add and delete user, group, objects from ldap database

Learn LDAP and OpenLDAP basics, including entries, attributes, DN, RDN, DIT, schemas, object classes, LDAP operations, slapd, cn=config and the MDB backend.

dsidm manages directory data in a 389 Directory Server instance — organizational units, POSIX users and groups, groupOfNames, service accounts, roles, and client configuration snippets. Server tuning stays in dsconf; …

dsctl manages local 389 Directory Server instances on the host — start and stop ns-slapd, list instances, run offline backups and LDIF exports, inspect TLS certificates, and remove instances. It does not change online …

slapadd imports LDIF directly into an offline OpenLDAP backend for controlled restores and initial loads on RHEL-family servers with openldap-servers.

slapcat exports an OpenLDAP server database to LDIF for offline backup, migration, and inspection on RHEL-family systems using openldap-servers.

slaptest parses and checks OpenLDAP slapd configuration before service startup or a configuration change on RHEL-family servers using openldap-servers.

Configure Apache HTTP Server to authenticate and authorize users with OpenLDAP using mod_authnz_ldap, group restrictions, TLS, and practical troubleshooting.

steps to install and configure freeipa server in rhel 8 the packages necessary for installing an Identity Management server are shipped with IDM server module

Compare seven multi-cloud management platforms for enterprise teams, from architecture design and IaC orchestration to Kubernetes, FinOps, observability, and security.

Fix missing Bash history commands in Linux, including commands lost across multiple terminals, delayed .bash_history writes, HISTCONTROL exclusions, and permission problems.

Create a Linux man page with a reusable groff template. Learn man sections, macros, local preview, system and user installation, mandb, whatis, and troubleshooting.

Understand TTY, PTY and PTS in Linux, including /dev/tty, /dev/pts, controlling terminals, terminal emulators, SSH, tmux, and practical commands.

Configure OpenLDAP users with NFS home directories using SSSD and autofs on RHEL, Rocky Linux, AlmaLinux, Oracle Linux, and CentOS Stream.

Compare Cinder block storage and Swift object storage in OpenStack, including access methods, architecture, use cases, scalability, and integration.

The Linux audit framework logs security-relevant events through auditd. Use auditctl to define rules, ausearch to query the audit log, and aureport for summaries — with augenrules to load persistent policy on RHEL-family …

nft is the userspace CLI for the Linux nftables firewall framework. Define tables, chains, and rules in the netfilter stack — list the live ruleset, load rule files, and debug filtering alongside firewalld on RHEL-family …

Check, disable or set Transparent HugePages to madvise on RHEL 8–10, Rocky Linux, AlmaLinux, CentOS Stream and Oracle Linux.

Download and sync complete RPM repositories on RHEL 8/9/10, Rocky Linux, AlmaLinux, CentOS Stream, and Oracle Linux using dnf reposync, repository metadata, GPG verification, and offline clients.

Create Anaconda updates.img on RHEL 8–10, embed it in boot media with mkksiso, load it with inst.updates, and verify the installer overlay.