# Check if Bash is installed and its version
bash --version
 

# See what shell you're currently using
echo $SHELL
 
# List all available shells on your system
cat /etc/shells
 

# Change your default shell to Bash
chsh -s /bin/bash
 
# You'll need to log out and back in for the change to take effect
 

# Install Homebrew first (if you don't have it)
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
 
# Install latest Bash
brew install bash
 
# Add the new Bash to allowed shells
sudo bash -c 'echo /opt/homebrew/bin/bash >> /etc/shells'
 
# Set it as your default shell
chsh -s /opt/homebrew/bin/bash
 
# Verify
bash --version
 

# Install WSL with Ubuntu (default)
wsl --install
 
# Restart your computer when prompted
 

# In your WSL terminal
bash --version
whoami
pwd
 

# See your current prompt setting
echo $PS1
 
# Simple prompt with just username and directory
PS1='\u:\w\$ '
 
# Colorful prompt
PS1='\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
 

# Color format: \[\033[CODEm\]
# Reset: \[\033[00m\]
 
# Colors:
# 30=Black  31=Red     32=Green   33=Yellow
# 34=Blue   35=Purple  36=Cyan    37=White
# Add 01; prefix for bold: 01;32 = Bold Green
 
# Example: Username in green, directory in blue
PS1='\[\033[01;32m\]\u\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
 

# Shows: [time] user@host:directory (with colors and newline)
PS1='\[\033[33m\][\t]\[\033[00m\] \[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\n\$ '
 

# ~/.bashrc - Personal Bash configuration
 
# If not running interactively, don't do anything
[[ $- != *i* ]] && return
 
# ============= History Configuration =============
HISTSIZE=10000              # Commands to remember in memory
HISTFILESIZE=20000          # Commands to save to file
HISTCONTROL=ignoreboth      # Ignore duplicates and commands starting with space
HISTTIMEFORMAT="%F %T "     # Add timestamps to history
shopt -s histappend          # Append to history, don't overwrite
 
# ============= Shell Options =============
shopt -s checkwinsize        # Update LINES and COLUMNS after each command
shopt -s cdspell             # Auto-correct minor cd typos
shopt -s dirspell            # Auto-correct directory name typos
shopt -s globstar            # Enable ** for recursive globbing
shopt -s nocaseglob          # Case-insensitive globbing
 
# ============= Prompt =============
PS1='\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
 
# ============= Aliases =============
alias ll='ls -alF'
alias la='ls -A'
alias l='ls -CF'
alias ..='cd ..'
alias ...='cd ../..'
alias grep='grep --color=auto'
alias mkdir='mkdir -pv'
alias df='df -h'
alias du='du -h'
alias free='free -h'
 
# ============= Safety Aliases =============
alias rm='rm -i'             # Ask before deleting
alias cp='cp -i'             # Ask before overwriting
alias mv='mv -i'             # Ask before overwriting
 
# ============= Custom Functions =============
# Create a directory and cd into it
mkcd() {
    mkdir -p "$1" && cd "$1"
}
 
# Extract any archive
extract() {
    if [ -f "$1" ]; then
        case "$1" in
            *.tar.bz2) tar xjf "$1" ;;
            *.tar.gz)  tar xzf "$1" ;;
            *.bz2)     bunzip2 "$1" ;;
            *.rar)     unrar x "$1" ;;
            *.gz)      gunzip "$1" ;;
            *.tar)     tar xf "$1" ;;
            *.tbz2)    tar xjf "$1" ;;
            *.tgz)     tar xzf "$1" ;;
            *.zip)     unzip "$1" ;;
            *.Z)       uncompress "$1" ;;
            *.7z)      7z x "$1" ;;
            *)         echo "'$1' cannot be extracted" ;;
        esac
    else
        echo "'$1' is not a valid file"
    fi
}
 
# ============= PATH =============
# Add local bin directory
export PATH="$HOME/.local/bin:$PATH"
 

# Built-in help for shell commands
help cd
help echo
 
# Manual pages (detailed documentation)
man ls
man bash
 
# Quick usage info
ls --help
grep --help
 
# Search for commands related to a topic
apropos "copy files"
man -k "network"
 
# One-line description of a command
whatis ls
whatis grep
 

# If a name exists in multiple sections, specify the section:
man 1 printf    # The shell command
man 3 printf    # The C library function