Terminal Multiplexers: Complete Guide to Screen and Tmux

# ~/.tmux.conf - Advanced Tmux Configuration

# ============================================================================
# GENERAL SETTINGS
# ============================================================================

# Set true color support
set -g default-terminal "screen-256color"
set -ga terminal-overrides ",xterm-256color:Tc"

# Enable mouse mode (tmux 2.1+)
set -g mouse on

# Set prefix to Ctrl-a (like screen)
unbind C-b
set -g prefix C-a
bind C-a send-prefix

# Reduce escape time for faster response
set -sg escape-time 0

# Increase scrollback buffer
set -g history-limit 10000

# Focus events for terminals that support it
set -g focus-events on

# ============================================================================
# KEY BINDINGS
# ============================================================================

# Reload configuration
bind r source-file ~/.tmux.conf \; display "Config reloaded!"

# Split windows with current path
bind | split-window -h -c "#{pane_current_path}"
bind - split-window -v -c "#{pane_current_path}"

# Easy pane navigation (vim style)
bind h select-pane -L
bind j select-pane -D
bind k select-pane -U
bind l select-pane -R

# Pane resizing with vim keys
bind -r H resize-pane -L 5
bind -r J resize-pane -D 5
bind -r K resize-pane -U 5
bind -r L resize-pane -R 5

# Quick window selection
bind -r C-h select-window -t :-
bind -r C-l select-window -t :+

# Window creation with current path
bind c new-window -c "#{pane_current_path}"

# ============================================================================
# APPEARANCE
# ============================================================================

# Status bar customization
set -g status-interval 1
set -g status-justify centre
set -g status-left-length 50
set -g status-right-length 150
set -g status-style "fg=#665c54"

# Status left
set -g status-left "#[fg=#7c6f64,bg=default,bold] #S #[fg=#7c6f64,bg=default]|"

# Window status
set -g window-status-format "#[fg=#7c6f64,bg=default] #I:#W "
set -g window-status-current-format "#[fg=#d79921,bg=default,bold] #I:#W "
set -g window-status-separator ""

# Status right
set -g status-right "#[fg=#7c6f64,bg=default] %Y-%m-%d %H:%M #[fg=#d79921,bg=default,bold] #(whoami)@#h "

# Pane border
set -g pane-border-style "fg=#7c6f64"
set -g pane-active-border-style "fg=#d79921"

# Message styling
set -g message-style "fg=#d79921,bg=#3c3836"

# ============================================================================
# COPY MODE (VI STYLE)
# ============================================================================

# Use vi keybindings in copy mode
setw -g mode-keys vi

# Copy to system clipboard (requires xclip on Linux)
bind -T copy-mode-vi v send -X begin-selection
bind -T copy-mode-vi y send -X copy-pipe "xclip -in -selection clipboard"
bind -T copy-mode-vi V send -X select-line
bind -T copy-mode-vi C-v send -X rectangle-toggle

# ============================================================================
# PLUGINS (TPM - Tmux Plugin Manager)
# ============================================================================

# Install TPM: git clone https://github.com/tmux-plugins/tpm ~/.tmux/plugins/tpm

# List of plugins
set -g @plugin 'tmux-plugins/tpm'
set -g @plugin 'tmux-plugins/tmux-sensible'
set -g @plugin 'tmux-plugins/tmux-resurrect'
set -g @plugin 'tmux-plugins/tmux-continuum'
set -g @plugin 'tmux-plugins/tmux-yank'
set -g @plugin 'christoomey/vim-tmux-navigator'
set -g @plugin 'tmux-plugins/tmux-prefix-highlight'
set -g @plugin 'tmux-plugins/tmux-sidebar'

# Tmux Resurrect settings
set -g @resurrect-strategy-nvim 'session'
set -g @resurrect-capture-pane-contents 'on'

# Tmux Continuum settings
set -g @continuum-restore 'on'
set -g @continuum-save-interval '15'

# Prefix highlight
set -g @prefix_highlight_show_copy_mode 'on'
set -g @prefix_highlight_copy_mode_attr 'fg=white,bg=red'

# ============================================================================
# ADVANCED FEATURES
# ============================================================================

# Enable aggressive resize (multiple clients)
setw -g aggressive-resize on

# Allow rename even if command is running
set -g allow-rename on

# Re-number windows when one is closed
set -g renumber-windows on

# Monitor activity in windows
setw -g monitor-activity on
set -g visual-activity off

# Bell settings
set -g visual-bell off
set -g bell-action none

# ============================================================================
# INITIALIZATION
# ============================================================================

# Initialize TMUX plugin manager (keep this line at the very bottom)
run '~/.tmux/plugins/tpm/tpm'

#!/bin/bash
# sysadmin-session.sh - Setup tmux session for system administration

SESSION="sysadmin"
TMUX="tmux"

# Check if session exists
$TMUX has-session -t $SESSION 2>/dev/null

if [ $? != 0 ]; then
    # Create new session
    $TMUX new-session -d -s $SESSION
    
    # Window 1: System Monitoring
    $TMUX rename-window -t $SESSION:1 'monitor'
    $TMUX send-keys -t $SESSION:1 'htop' C-m
    
    # Split window 1
    $TMUX split-window -v -t $SESSION:1
    $TMUX send-keys -t $SESSION:1.1 'watch -n 5 "df -h | grep -E \"Filesystem|/$\""' C-m
    
    $TMUX split-window -h -t $SESSION:1.1
    $TMUX send-keys -t $SESSION:1.2 'watch -n 5 "free -h"' C-m
    
    # Window 2: Logs
    $TMUX new-window -t $SESSION:2 -n 'logs'
    $TMUX send-keys -t $SESSION:2 'sudo tail -f /var/log/syslog' C-m
    
    $TMUX split-window -v -t $SESSION:2
    $TMUX send-keys -t $SESSION:2.1 'sudo tail -f /var/log/auth.log' C-m
    
    $TMUX split-window -h -t $SESSION:2.1
    $TMUX send-keys -t $SESSION:2.2 'journalctl -f' C-m
    
    # Window 3: Network
    $TMUX new-window -t $SESSION:3 -n 'network'
    $TMUX send-keys -t $SESSION:3 'iftop' C-m
    
    $TMUX split-window -v -t $SESSION:3
    $TMUX send-keys -t $SESSION:3.1 'watch -n 5 "netstat -tulpn | grep LISTEN"' C-m
    
    # Window 4: Services
    $TMUX new-window -t $SESSION:4 -n 'services'
    $TMUX send-keys -t $SESSION:4 'systemctl list-units --type=service --state=running' C-m
    
    $TMUX split-window -v -t $SESSION:4
    $TMUX send-keys -t $SESSION:4.1 'watch -n 10 "systemctl --no-pager status nginx mysql redis"' C-m
    
    # Window 5: Backup/Maintenance
    $TMUX new-window -t $SESSION:5 -n 'backup'
    $TMUX send-keys -t $SESSION:5 'cd /backup && ls -la' C-m
    
    # Window 6: Shell
    $TMUX new-window -t $SESSION:6 -n 'shell'
    
    # Select first window
    $TMUX select-window -t $SESSION:1
fi

# Attach to session
$TMUX attach -t $SESSION