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Linux Server Tutorials

Linux VPS and dedicated server guides: disks, LVM, SSH, swap, firewall and troubleshooting.

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All Tutorials34 Getting Started3 Linux Server8 Windows Server5 Network & IP5 aaPanel / BaoTa3 Site Clusters & Multi-IP2 Virtualization & Host Nodes2 IP & ASN5 Account & Support1

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1How to Enable BBR on Linux: Turn On TCP BBR Congestion Control Manually 2How to Install aaPanel / BaoTa Panel on a Linux Server: One-Click Install, Open Ports and Log In 3Windows Remote Desktop Connection Failed: Troubleshooting RDP Port 3389, Firewall and CredSSP Errors 4Linux SSH Connection Failed? Troubleshooting Connection Refused, Timeouts and Login Errors 5Linux Disk Full? How to Check and Free Up Disk Space and Find Large Files

Linux Server Tutorials

root@server: ~ $ lsblk$ mkfs.ext4 /dev/vdb1$ mount /dev/vdb1 /data Linux Server How to Partition, Format and Mount a Data Disk on Linux (Auto-Mount at Boot) Mount a data disk on Linux: partition with fdisk or parted, format ext4/XFS and auto-mount via fstab UUID. 6 steps11 min read Read tutorial

root@server: ~ $ growpart /dev/vda 3$ pvresize /dev/vda3$ lvextend -r -l +100%FREE Linux Server How to Extend a Disk on Linux with LVM (lvextend, resize2fs, xfs_growfs, growpart) Extend a Linux disk with LVM: lvextend, resize2fs or xfs_growfs, and grow the root partition with growpart. 6 steps10 min read Read tutorial

root@server: ~ $ df -hT$ du -xh --max-depth=1 /No space left on device Linux Server Linux Disk Full? How to Check and Free Up Disk Space and Find Large Files Free up Linux disk space: df -h, du and ncdu, find large files, clean journald logs and Docker data. 7 steps11 min read Read tutorial

/etc/ssh/sshd_config # Port 22Port 2222$ passwd root Linux Server How to Change the SSH Port and Root Password on Linux (Firewall and SELinux Included) Change the SSH port and root password on Linux: sshd_config, SELinux, firewalld/ufw and passwd. 7 steps11 min read Read tutorial

root@server: ~ $ ssh-keygen -t ed25519$ ssh-copy-id -i ~/.ssh/id_ed25519.pub [email protected]PasswordAuthentication no Linux Server Set Up SSH Key Login on Linux and Disable Password Authentication (ed25519) Set up SSH key login on Linux with ed25519 and ssh-copy-id, then safely disable password login. 6 steps11 min read Read tutorial

Terminal $ ssh -vvv -p 22 [email protected]Connection refusedPermission denied (publickey) Linux Server Linux SSH Connection Failed? Troubleshooting Connection Refused, Timeouts and Login Errors Fix Linux SSH connection refused or timed out: check sshd, firewall and fail2ban, recover via VNC. 7 steps12 min read Read tutorial

root@server: ~ $ fallocate -l 2G /swapfile$ mkswap /swapfile$ swapon /swapfile Linux Server How to Add Swap Space on Linux: Create a Swap File and Tune Swappiness Add swap space on Linux: create a swap file, enable it with mkswap and swapon, and tune swappiness. 6 steps9 min read Read tutorial

root@server: ~ $ ufw allow 22/tcp$ firewall-cmd --reloadStatus: active Linux Server Linux Firewall Setup: How to Open Ports with firewalld and ufw Linux firewall guide: open ports with firewalld and ufw, restrict source IPs and avoid SSH lockout. 6 steps11 min read Read tutorial

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