Intermediate on @yt.yeasin50

Tmux essential commands

Wed, 31 Dec 2025 20:00:00 +0600

Tmux essential commands explained navigation’s, terminal split, windows, panes and sessions.

Basic navigation commands

Action	Shortcut / Command	Description
New window	Ctrl+b c	নতুন window তৈরি
Next window	Ctrl+b n	পরবর্তী window এ যান
Previous window	Ctrl+b p	আগের window এ যান
Rename window	Ctrl+b ,	Window rename করুন
Close window	Ctrl+b &	Window বন্ধ করুন
Split pane vertically	Ctrl+b %	Terminal vertical split
Split pane horizontally	Ctrl+b "	Terminal horizontal split
Move between panes	Ctrl+b + Arrow keys	Pane selection পরিবর্তন
Resize pane	Ctrl+b hold Arrow keys	Pane size পরিবর্তন
Detach session	Ctrl+b d	Background এ session রাখুন
Attach session	tmux attach	পুনরায় attach করুন
List sessions	tmux ls	Session list দেখুন
Kill session	tmux kill-session -t name	Session delete করুন

Rofi - App launcher

Sat, 31 May 2025 20:00:00 +0600

Rofi

X11 app launcher and switcher

Make sure to install the nerd fonts; You can checkout for windows and for linux

Config

Follow my github/codeberg for update dotfiles

configuration {
 modi: "drun";
 show-icons: true;
 display-drun: "";
 drun-display-format: "{name}";
 font: "JetBrains Mono Nerd Font 11";
}

/* Tokyo Night / Bluish Theme Variables */
* {
 bg-col: #1A1B26; /* Deep Tokyo Night background */
 bg-col-light: #24283B; /* Used only for the search bar now */
 border-col: #7AA2F7; /* Bright Tokyo Night blue */
 blue: #7AA2F7;
 fg-col: #C0CAF5; /* Main text color */
 fg-col-muted: #565F89; /* Muted text for placeholder */

 /* Base resets */
 background-color: transparent;
 text-color: @fg-col;
 margin: 0;
 padding: 0;
}

window {
 width: 35%;
 background-color: @bg-col;
 border: 2px solid;
 border-color: @border-col;
 border-radius: 10px;
 padding: 15px;
}

mainbox {
 background-color: transparent;
 spacing: 15px;
}

inputbar {
 children: [prompt, entry];
 background-color: @bg-col-light;
 border-radius: 8px;
 padding: 10px;
}

prompt {
 background-color: @blue;
 text-color: @bg-col;
 padding: 6px 12px;
 border-radius: 6px;
 margin: 0px 10px 0px 0px;
 font: "JetBrains Mono Nerd Font Bold 11";
}

entry {
 padding: 6px 0px;
 background-color: transparent;
 text-color: @fg-col;
 placeholder: "Search applications...";
 placeholder-color: @fg-col-muted;
}

listview {
 background-color: transparent;
 columns: 1;
 lines: 7;
 spacing: 6px;
 cycle: false;
 dynamic: true;
 scrollbar: false;
}


element {
 background-color: transparent; /* Melts perfectly into the main window */
 text-color: @fg-col;
 padding: 10px 12px;
 border-radius: 8px;
 spacing: 12px;
 orientation: horizontal;
}

element-icon {
 size: 24px;
 background-color: transparent;
}

element-text {
 background-color: transparent;
 text-color: inherit;
 vertical-align: 0.5;
}

element selected {
 background-color: transparent; /* No more clashing solid backgrounds */
 text-color: @blue; /* Changes the text to match your outline */
 border: 2px solid; /* Thicker outline for that neon/border vibe */
 border-color: @blue; /* The Tokyo Night blue outline you liked */
}

Tmux Config Basics

Fri, 02 Jan 2026 20:00:00 +0600

This post covers basic tmux configuration, enabling mouse support, changing pane key bindings, reloading the tmux config, and adjusting window and pane index settings.

You can checkout my config file

# Change prefix key to Ctrl + a
unbind C-b
set -g prefix C-a
bind C-a send-prefix

# Enable mouse support
set -g mouse on

# Enable Vim-style copy mode
setw -g mode-keys vi
bind-key -T copy-mode-vi v send -X begin-selection
bind-key -T copy-mode-vi y send -X copy-selection-and-cancel
bind-key -T copy-mode-vi Escape send -X cancel
bind -n M-v copy-mode

# Vim-style pane navigation
bind h select-pane -L
bind j select-pane -D
bind k select-pane -U
bind l select-pane -R

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

# Create a new window in the current directory
bind c new-window -c "#{pane_current_path}"

# Split panes in the current directory
bind | split-window -h -c "#{pane_current_path}"
bind - split-window -v -c "#{pane_current_path}"

# Unbind default split keys
unbind '"'
unbind %

Pobybar - A customize panel

Thu, 19 Jun 2025 20:00:00 +0600

Polybar

Make sure to install the nerd fonts

GitHub repo of polybar

Folder structure:

yeasin@Workstation ~/.config/polybar
[master] ❯ tree
.
├── config.ini
├── launch.sh

configs

config.ini

[colors]
bg = #1a1b26
bg-alt = #24283b
fg = #c0caf5
accent = #7aa2f7
alert = #f7768e
empty = #00000000

[bar/example]
monitor = ${env:MONITOR:}
width = 96%
height = 26pt
offset-x = 0%
offset-y = 0%
radius = 10

background = ${colors.bg}
foreground = ${colors.fg}

# Invisible border to fake the floating effect in i3
border-size = 4pt
border-color = ${colors.empty}

padding-left = 2
padding-right = 2
module-margin = 2

# FONT CONFIGURATION
font-0 = "JetBrains Mono:weight=bold:size=10;2"
font-1 = "JetBrainsMono Nerd Font:size=13;3"
font-2 = "JetBrainsMonoNL Nerd Font:size=13;3"

modules-left = workspaces
modules-center = date
modules-right = pulseaudio memory cpu powermenu

[module/xwindow]
type = internal/xwindow
label = %title%

[module/workspaces]
type = internal/xworkspaces
pin-workspaces = false
strip-workspace-numbers = false
label-separator = " "

label-active = %index%
label-occupied = %index%
label-empty = %index%
label-urgent = %index%

label-active-foreground = ${colors.bg}
label-active-background = ${colors.accent}
label-active-padding = 4

label-occupied-foreground = ${colors.fg}
label-occupied-background = ${colors.bg-alt}
label-occupied-padding = 4

label-empty-foreground = ${colors.fg}
label-empty-background = ${colors.bg}
label-empty-padding = 4

label-urgent-foreground = ${colors.bg}
label-urgent-background = ${colors.alert}
label-urgent-padding = 4

[module/date]
type = internal/date
interval = 60
date = %I:%M %p - %d %A
date-alt = %A, %Y-%m-%d
label = %date%
label-foreground = ${colors.accent}

[module/pulseaudio]
type = internal/pulseaudio
format-volume = VOL <label-volume>
label-volume = %percentage%%
label-volume-foreground = ${colors.fg}
label-muted = MUTED
label-muted-foreground = ${colors.alert}
click-middle = pavucontrol

[module/memory]
type = internal/memory
interval = 2
label = RAM %percentage_used%%
label-foreground = ${colors.accent}

[module/cpu]
type = internal/cpu
interval = 2
label = CPU %percentage%%
label-foreground = ${colors.fg}


[module/powermenu]
type = custom/text
content = ""
content-foreground = ${colors.alert}
click-left = ~/.config/rofi/scripts/powermenu.sh



[module/battery]
type = internal/battery
battery = BAT0
adapter = AC
full-at = 98

format-charging = <label-charging>
format-discharging = <label-discharging>
format-full = <label-full>

label-charging =  %percentage%%
label-discharging =  %percentage%%
label-full =  %percentage%%

powermenu

Stays inside rofi config, but you can put it anywhere. Just make sure to provide the correct path

Tmux Plugins

Mon, 05 Jan 2026 20:00:00 +0600

Make it look better and Must have plugins for 10x dev.

Check the GitHub Dotfiles

 1# .... previouse configs
 2
 3set -g @plugin 'tmux-plugins/tpm'
 4set -g @plugin 'tmux-plugins/tmux-sensible'
 5set -g @plugin 'tmux-plugins/tmux-resurrect'
 6set -g @plugin 'tmux-plugins/tmux-yank'
 7
 8set -g @plugin 'dracula/tmux'
 9set -g @dracula-show-powerline true
10set -g @dracula-plugins "cpu-usage ram-usage"
11set -g @dracula-show-gpu false
12
13run '~/.tmux/plugins/tpm/tpm' # your tmp path
14
15set-option -g base-index 1
16set-option -g pane-base-index 2
17set-option -g set-clipboard on
18
19bind -n M-Left select-pane -L
20bind -n M-Right select-pane -R
21bind -n M-Up select-pane -U
22bind -n M-Down select-pane -D
23
24set -g status-position top

Selection & Copy-Paste in TMUX

Wed, 07 Jan 2026 20:00:00 +0600

How can we copy and paste text in TMUX?

Check the GitHub Dotfiles

We are using the tmux-yank plugin from the previous video.

To select text:

Press Ctrl + b to enter TMUX command mode.
Move the cursor to the start of the text you want to select.
Press Space to start the selection.
Move the cursor to the end of the text.
Press y to copy the selection to the system clipboard.

Or just drag the mouse to select text and press y to copy

Abstract & Generic class

Sun, 23 Aug 2026 19:00:00 +0800

Abstract class

You went to your local restaurant for breakfast. When you got there, you saw a lump of raw dough sitting in front of the stove. Then a boy came over and asked, “Ruti, paratha, or naan?” Whatever you say, they prepare it right on the spot and serve it to you.

Here the dough on the counter is the abstract class.

abstract class Dough{}

It exits, but it has no final form. You can not eat it raw rough dough. In programming we would say, you can not initiate it.

Abstract & Generic class

Sun, 23 Aug 2026 19:00:00 +0800

Abstract class

Sealed & Union class

Sun, 23 Aug 2026 19:00:00 +0800

I hope you’ve already checked the Abstract & Generic . We already know what abstract class is and it can be extend from anywhere by importing the abstract class. It offered the benefits of restriction extending class outside the library.

abstract class ApiState {}

class Loading extends ApiState {}
class Success extends ApiState {}
class Error extends ApiState {}

But we create a sealed class, it can not be only extend from that library/file.

Note each file is a library, and you can use part/part of to combine multiple file.

Sealed & Union class

Sun, 23 Aug 2026 19:00:00 +0800

I hope you’ve already checked the Abstract & Generic.
We already know what abstract class is, and it can be extend from anywhere.

// api_state.dart
abstract class ApiState {}

class Loading extends ApiState {}
class Success extends ApiState {}

// api_provider.dart
class Error extends ApiState {}

Sealed class

But Sealed class restrict extending class outside the library. You can only extends it within the same library/file.

Git with SSH & Multiple Repo

Fri, 26 Jun 2026 13:01:40 +0600

Setup SSH authentication for GitHub and Codeberg, and manage multiple Git remotes from a single local repository.

App-State with Provider

Thu, 13 Aug 2026 19:00:00 +0600

This video covers Provider in Flutter, including ChangeNotifier, ProxyProvider, FutureProvider, StreamProvider, DevTools, and common Provider mistakes.

Code

Clone the starter codebase
Switch to the provider-start branch
Continue from there

Or just watch the video:

Shared_preference

Persistent theme with Shared_preference.

Flutter Go-Router

Tue, 20 Oct 2026 19:00:00 +0600

GoRouter in Flutter

go_router on pub.dev↗

Source Code

Setup, Route Configuration & Sub-Routes

Previous Navigator 2.0 implementation: https://github.com/yeasin50/lisa_fischer

Path Parameters, Query Parameters & Exit Dialog

Redirection & Async Redirects