# Voidcore Wiki

## Docs

- [How to Contribute Articles and Edits to Voidcore Wiki](https://wiki.thevoid.fyi/contributing.md): Learn how to contribute articles, suggest corrections, and improve Voidcore Wiki. Help build a better Linux and sysadmin reference for everyone.
- [Voidcore Wiki: Your Linux & Sysadmin Knowledge Base](https://wiki.thevoid.fyi/introduction.md): Voidcore Wiki is a technical reference for Linux, Ubuntu, networking, and system administration. Browse guides, commands, and best practices.
- [Navigating the Linux Filesystem Hierarchy Standard](https://wiki.thevoid.fyi/linux/file-system.md): Understand the Linux Filesystem Hierarchy Standard (FHS): key directories like /etc, /var, /home, /usr, and how to navigate and manage files.
- [Linux Essentials: Core Concepts, Commands, and Skills](https://wiki.thevoid.fyi/linux/overview.md): An introduction to Linux fundamentals including the file system, permissions, process management, and shell usage for new and intermediate users.
- [Linux File Permissions: chmod, chown, and chgrp Guide](https://wiki.thevoid.fyi/linux/permissions.md): Learn how Linux file permissions work, how to read permission strings, and how to change file ownership and access with chmod, chown, and chgrp.
- [Managing Linux Processes: ps, top, kill, and Signals](https://wiki.thevoid.fyi/linux/processes.md): Learn how to view, monitor, and control Linux processes using ps, top, htop, kill, nice, and other process management tools and signals.
- [Linux Shell Basics: Essential Commands and Shortcuts](https://wiki.thevoid.fyi/linux/shell-basics.md): Master the Linux command line with essential shell commands, input/output redirection, pipes, environment variables, and useful keyboard shortcuts.
- [DNS Configuration and Troubleshooting on Ubuntu Linux](https://wiki.thevoid.fyi/networking/dns.md): Configure DNS resolvers on Linux, edit /etc/resolv.conf and /etc/hosts, use dig, nslookup, and host to query DNS records and troubleshoot resolution.
- [Configure Linux Firewalls with ufw and iptables Rules](https://wiki.thevoid.fyi/networking/firewall.md): Set up and manage Linux firewall rules using ufw for simple allow/deny policies and iptables for advanced packet filtering and chain management.
- [Configure IP Addresses and Network Interfaces on Linux](https://wiki.thevoid.fyi/networking/ip-addressing.md): Configure static and dynamic IP addresses on Linux using ip, ifconfig, Netplan, and NetworkManager. View routes, interfaces, and network statistics.
- [Linux Networking: IP Addressing, DNS, Firewall, and SSH](https://wiki.thevoid.fyi/networking/overview.md): Explore Linux networking essentials: configure IP addresses, manage DNS, set up firewalls with ufw and iptables, and connect securely using SSH.
- [SSH: Secure Remote Access, Keys, and Tunneling on Linux](https://wiki.thevoid.fyi/networking/ssh.md): Connect to remote servers with SSH, set up key-based authentication, configure sshd, use SSH tunneling and agent forwarding, and harden SSH security.
- [Quickstart Guide: Get the Most Out of Voidcore Wiki](https://wiki.thevoid.fyi/quickstart.md): Learn how to navigate and use Voidcore Wiki to find Linux, Ubuntu, and networking guides quickly. Discover articles, search content, and contribute.
- [Backup Strategies for Linux: rsync, tar, and Scheduling](https://wiki.thevoid.fyi/sysadmin/backups.md): Implement Linux backups with rsync for incremental sync, tar for archives, and cron for scheduling. Covers local, remote, and offsite backup strategies.
- [Linux System Monitoring: Metrics, Logs, and journalctl](https://wiki.thevoid.fyi/sysadmin/monitoring.md): Monitor Linux system health with top, htop, vmstat, and iostat. Manage logs with journalctl, logrotate, and understand /var/log directory structure.
- [Linux Server Security Hardening: Best Practices Guide](https://wiki.thevoid.fyi/sysadmin/security-hardening.md): Harden your Linux server by configuring SSH, Fail2ban, UFW, automatic updates, auditd, and file integrity monitoring to reduce your attack surface.
- [Managing System Services with systemd and systemctl](https://wiki.thevoid.fyi/sysadmin/services.md): Control Linux system services with systemctl: start, stop, enable, disable, and inspect services. Includes writing custom systemd unit files for your apps.
- [Linux Storage and Disk Management: A Complete Guide](https://wiki.thevoid.fyi/sysadmin/storage.md): Manage disks and storage on Linux: view disk usage with df and du, partition with fdisk, format filesystems, mount drives, and manage LVM volumes.
- [Ubuntu ACLs: setfacl and getfacl File Permission Guide](https://wiki.thevoid.fyi/ubuntu/acls.md): Use ACLs in Ubuntu to set fine-grained file permissions beyond standard Unix ownership. Learn setfacl, getfacl, default ACLs, and how to install acl tools.
- [Install Ubuntu Server or Desktop: Step-by-Step Guide](https://wiki.thevoid.fyi/ubuntu/installation.md): Install Ubuntu Server or Desktop from scratch. Download the ISO, create bootable media, partition your disk, and complete the initial system setup.
- [Ubuntu Linux: Setup, Packages, and System Administration](https://wiki.thevoid.fyi/ubuntu/overview.md): Your guide to Ubuntu Linux: installation, package management with apt, user management, access control lists, and core system administration tasks.
- [Managing Ubuntu Packages with apt, apt-get, and dpkg](https://wiki.thevoid.fyi/ubuntu/package-management.md): Manage software on Ubuntu using apt and apt-get: install, remove, update, and search for packages. Includes PPAs, dpkg, and snap package commands.
- [Ubuntu User Management: useradd, usermod, and sudo](https://wiki.thevoid.fyi/ubuntu/users-and-groups.md): Create, modify, and delete user accounts and groups in Ubuntu. Learn useradd, usermod, userdel, groupadd, and how to manage sudo privileges.