System Administration Guides and Best Practices
Learn system administration with practical guides on user management, services, monitoring, and Linux server management.
The System Administration section focuses on managing and maintaining Linux systems efficiently.
These tutorials cover essential administrative tasks required for servers and production environments.
You can also explore Linux and Networking for deeper insights.
Topics covered
- User and group management
- Service and process management
- System monitoring
- Troubleshooting
Ideal for
- System administrators
- DevOps engineers
105 articles
Create Central Authentication Server with OpenLDAP and NSLCD in Ubuntu
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
Install and Configure OpenLDAP on Ubuntu [Step-By-Step]
OpenLDAP is an open-source implementation of the Lightweight Directory Access Protocol (LDAP). It's widely used for managing directory information, providing
sshd: ssh-rsa algorithm is disabled [SOLVED]
We recently upgraded our Base OS and there we starting facing this issue where all SSH connection via RSA Key started to fail with error "sshd: ssh-rsa
Fixing 'SSH: No Route to Host' Error [7 Reasons]
The "SSH: No route to host" error to be honest can occur n number of issues. There is no specific one solution which will work for all scenarios. So in this
What is SSH Multiplexing and How to use Securely?
This tutorial covers SSH Multiplexing, explaining its benefits, setup, and use cases. We'll guide you through configuration steps, security best practices, and …
How to use C++ WriteFile? [SOLVED]
C++ provides several file I/O functions that enable programmers to write and read data from files. One of these functions is WriteFile, which is part of the
What are GRUB Files in Linux? [In-Depth Tutorial]
Grub files, also known as GRand Unified Bootloader, are essential components in the Linux operating system that facilitate the booting process. Grub files are
How to use cin for an array in C++ [SOLVED]
In c++ cin array is not performed in one cin statement. In this article we will learn about array input in c++. To understand array input, we first need to
[SOLVED] Upload file to Linux server from Windows
3 different methods to upload file to Linux server from Windows. Using SCP or PSCP CLI tool, or Using WinSCP and/or FileZilla which are GUI based tool
[SOLVED] Restrict FTP user to a directory in Linux
Use chroot_local_user to restrict FTP user to a directory in vsftpd.conf in Linux. You can specify the directory name and path which acts as home directory for …
Create cron job or schedule jobs using bash scripts in Linux or Unix
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
How to restrict or allow ssh only from certain users, groups or hosts in Linux
How to allow SSH for root login only from specific host or IP address? How to configure and restrict SSH to permit login only for certain users and/or groups?
Install iRedMail on Rocky Linux 8 [Step-by-Step]
Step by Step instructions to install iredmail on rocky linux 8 with screenshots. Install and Configure iredmail server GUI
OpenLDAP Migration Tutorial [Step-by-Step]
Perform openldap migration from one machine to another. Migrate system users to ldap user database using migrationtools rpm
Configure multi-master replication OpenLDAP [Step-by-Step]
Multi-master replication in OpenLDAP is a replication technique using Syncrepl to replicate data to multiple provider ("Provider") Directory servers. Under the …