My Bash Configuration

A collection of customizations for my .bashrc to improve productivity and command-line experience.

History Settings

HISTSIZE=10000
HISTFILESIZE=20000
HISTTIMEFORMAT="%Y-%m-%d %H:%M:%S "
HISTIGNORE="&:ls:cd:pwd:exit:fg:bg:history"

Variable	Description
HISTSIZE	Number of commands kept in memory (10,000)
HISTFILESIZE	Number of commands stored in history file (20,000)
HISTTIMEFORMAT	Adds timestamps to history entries
HISTIGNORE	Excludes common commands from history to reduce noise

Shell Options

shopt -s checkwinsize
shopt -s globstar
shopt -s autocd
shopt -s cdspell
shopt -s dirspell

Option	Description
checkwinsize	Updates LINES and COLUMNS after each command
globstar	Enables ** pattern to match files recursively
autocd	Type a directory name to cd into it directly
cdspell	Auto-corrects typos in cd commands
dirspell	Auto-corrects typos in tab completion

Readline Bindings

bind '"\e[A": history-search-backward'
bind '"\e[B": history-search-forward'
bind 'set completion-ignore-case on'
bind 'set show-all-if-ambiguous on'

• Arrow keys: Search history based on current input prefix
• Case-insensitive completion: Tab completion ignores case
• Show all if ambiguous: Display all matches immediately without requiring a second Tab press

Aliases

File Listing

alias ll='ls -l'
alias la='ls -A'
alias l='ls -CF'

Navigation

alias ..='cd ..'
alias ...='cd ../..'
alias c='clear'
alias root='cd ~/Metaflow/Metaflow-datascience'
alias bd='cd "$OLDPWD"'  # Go back to previous directory

System Utilities

alias df='df -h'
alias du='du -h'
alias free='free -h'
alias ports='ss -tulanp'
alias dsize='du -sh * | sort -hr' 
alias topmem='ps aux --sort=-%mem | head -11'
alias topcpu='ps aux --sort=-%cpu | head -11'

All display human-readable sizes by default.

Network

alias myip='curl -s ifconfig.me && echo'  # Public IP
alias localip="hostname -I | awk '{print \$1}'"  # Local IP

Safety

alias rm='rm -i'  # Ask before deleting
alias mv='mv -i'  # Ask before overwriting
alias cp='cp -i'  # Ask before overwriting

Git

alias gitlog="git log --graph --abbrev-commit --decorate --format=format:'%C(bold blue)%h%C(reset) - %C(bold green)(%ar)%C(reset) %C(white)%s%C(reset) %C(dim white)- %an%C(reset)%C(auto)%d%C(reset)'"

Pretty graph view of git history with colors and relative dates.

Custom Functions

mkcd — Create and enter directory

mkcd() { mkdir -p "$1" && cd "$1"; }

extract — Universal archive extraction

extract() {
    if [ -f "$1" ]; then
        case "$1" in
            *.tar.bz2) tar xjf "$1" ;;
            *.tar.gz)  tar xzf "$1" ;;
            *.tar.xz)  tar xJf "$1" ;;
            *.bz2)     bunzip2 "$1" ;;
            *.gz)      gunzip "$1" ;;
            *.tar)     tar xf "$1" ;;
            *.zip)     unzip "$1" ;;
            *.7z)      7z x "$1" ;;
            *)         echo "Format non reconnu: $1" ;;
        esac
    fi
}

Supports: .tar.bz2, .tar.gz, .tar.xz, .bz2, .gz, .tar, .zip, .7z

bak — Timestamped backup

bak() { cp "$1" "$1".bak."$(date +%Y%m%d%H%M%S)"; }

Creates a backup with format: filename.bak.YYYYMMDDHHmmss

sysinfo — Quick system overview

sysinfo() {
    echo "=== Uptime ===" && uptime
    echo "=== Memory ===" && free -h
    echo "=== Disk ===" && df -h /
}

calc — Quick calculator

calc() { python3 -c "print($*)" ; }