System Administration Guides and Best Practices - Page 6

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.

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

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

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.

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.

Configure Postfix as a null client or internal SMTP relay on RHEL 9 and 10, Rocky Linux, AlmaLinux, CentOS Stream, and Oracle Linux using relayhost, SASL authentication, STARTTLS, SWAKS, and queue troubleshooting.

Create a system-level systemd service that starts at boot and runs as a dedicated non-root user and group on Ubuntu, Debian, Fedora, RHEL, Rocky Linux, AlmaLinux, CentOS Stream and Oracle Linux.

Mount a local filesystem with a systemd mount unit on RHEL 8–10, Rocky Linux, AlmaLinux, CentOS Stream and Oracle Linux without editing fstab.

Learn how to check filesystem type in Linux for mounted paths, disks, partitions, LVM volumes, USB drives, ISO media, and unmounted filesystem images with tested findmnt, lsblk, blkid, df, file, stat, udevadm, fstab, …

How to update crond using a shell script? Schedule cron job using command line bash shell script in Linux? Create cron job using crontab shell script Unix

Learn how to clear system storage on Mac using terminal commands. This advanced guide covers disk usage analysis, cache cleanup, log removal, and troubleshooting system data taking excessive space on macOS.

Shell script to read user input during boot stage in Linux with a systemd service in CentOS/RHEL 7/8 Linux. Take input at the startup script in Linux.

An overview on systemd-journald service, how logging happens in RHEL 7 Linux with Journals and systemd-journald logrotate. Compare systemd-journald vs rsyslogd

Steps to automount file system using systemd automount unit file without /etc/fstab to automatically mount and unmount file system in rhel/centos 7 and 8

Creating /forcefsck and /fsckoptions doesn't work on CentOS/RHEL 7/8 Linux How to perform force file system check on boot (next reboot) using systemd-fsck?

How to execute a script after a network file system is mounted? How to start a systemd service only after NFS share is mounted and available in Linux

How to mount Oracle VirtualBox shared folder using systemd unit file at system startup? How to execute a script during reboot on the shared folder from Vbox using systemd?

How to fix starting package installation process error populating transaction, anaconda is retrying faced during RHEL/CentOS 7/8 installation in Linux

How to configure vlan with bond using kickstart in RHEL/CentOS 7. You can configure using network --vlan or using %post section of kickstart with examples.

Get an overview of tuned profile tuned-adm and steps to create custom tuned profile in Red Hat or CentOS 7. List tuned profiles configure own tuned profile

Step-by-Step Tutorial to create KVM Virtual Machine using Cockpit Web Console on RHEL/CentOS 8 Linux. virtual machine creation and management with Cockpit

Step by step guide to install and configure controller node in openstack, configure openstack services like keystone, mariadb, rabbitmq, environment files

How to move directory to another partition move opt to new partition. move home to another partition. move var to new partition in RHEL/CentOS 7/8 Linux.

Configure XFS quotas with xfs_quota, enable uquota, gquota and pquota in /etc/fstab, set project quotas, and change or check the quota grace period.

Steps to create custom RHEL ISO using Cockpit Image Builder Web Console and CLI in RHEL 8 Linux. Create Live ISO, QCOW2, Amazon Machine Image, Azure Disk Img

List active SSH connections in Linux. Show SSH connection history. Show active SSH sessions in Linux using multiple commands. How to check active ssh sessions.