tmux and Screen: Persistent Sessions

# Ubuntu/Debian
sudo apt install tmux -y

# CentOS/AlmaLinux
sudo dnf install tmux -y

# Create new session
tmux

# Create session with name
tmux new -s sessionname

# List active sessions
tmux ls

# Attach an existing session
tmux attach -t sessionname
# or: tmux a -t sessionname

# Attach to the last session
tmux attach

# Connect via SSH
ssh root@185.100.xxx.xxx

# Create session for your server
tmux new -s minecraft

# Start the server inside tmux
cd /opt/minecraft && java -Xmx2G -jar server.jar nogui

# Press Ctrl+B then D to detach
# The server continues running!

# Disconnect from SSH
exit

# Reconnect the next day
ssh root@185.100.xxx.xxx
tmux attach -t minecraft
# You're back in the session, the server is still active

cat > ~/.tmux.conf << 'EOF'
# Change prefix from Ctrl+B to Ctrl+A (like screen)
# set -g prefix C-a

# Enable mouse
set -g mouse on

# Increase scroll history
set -g history-limit 10000

# Better colors
set -g default-terminal "screen-256color"

# Number windows starting from 1
set -g base-index 1

# Status bar
set -g status-right '%H:%M %d-%m-%Y'
EOF

# Reload config without restarting tmux
tmux source-file ~/.tmux.conf

# Delete specific session
tmux kill-session -t sessionname

# Delete all sessions
tmux kill-server

sudo apt install screen -y

# Create new session
screen

# Create session with name
screen -S sessionname

# List sessions
screen -ls

# Attach session
screen -r sessionname
screen -r  # if there's only one

# Detach: Ctrl+A then D

# Close session permanently: Ctrl+A then K

# Create a systemd service
sudo nano /etc/systemd/system/tmux-boot.service

[Unit]
Description=Start tmux session on boot
After=network.target

[Service]
Type=forking
User=root
ExecStart=/usr/bin/tmux new-session -d -s main -c /root
ExecStop=/usr/bin/tmux kill-session -t main
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target

sudo systemctl enable tmux-boot
sudo systemctl start tmux-boot