Alias taken from https://github.com/mathiasbynens/dotfiles that I use personally

.alias

# Detect which `ls` flavor is in use
if ls --color > /dev/null 2>&1; then # GNU `ls`
  colorflag="--color"
else # OS X `ls`
  colorflag="-G"
fi

# List all files colorized in long format
alias l="ls -lF ${colorflag}"

# List all files colorized in long format, including dot files
alias la="ls -laF ${colorflag}"

# List only directories
alias lsd="ls -lF ${colorflag} | grep --color=never '^d'"

# Always use color output for `ls`
alias ls="command ls ${colorflag}"
export LS_COLORS='no=00:fi=00:di=01;34:ln=01;36:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arj=01;31:*.taz=01;31:*.lzh=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.gz=01;31:*.bz2=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.avi=01;35:*.fli=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.ogg=01;35:*.mp3=01;35:*.wav=01;35:'

# Enable aliases to be sudo’ed
alias sudo='sudo '

# Get week number
alias week='date +%V'

# Stopwatch
alias timer='echo "Timer started. Stop with Ctrl-D." && date && time cat && date'

# Get OS X Software Updates, and update installed Ruby gems, Homebrew, npm, and their installed packages
alias update='sudo softwareupdate -i -a; brew update; brew upgrade; brew cleanup; npm install npm -g; npm update -g; sudo gem update --system; sudo gem update'

# IP addresses
alias ip="dig +short myip.opendns.com @resolver1.opendns.com"
alias localip="ipconfig getifaddr en0"
alias ips="ifconfig -a | grep -o 'inet6\? \(addr:\)\?\s\?\(\(\([0-9]\+\.\)\{3\}[0-9]\+\)\|[a-fA-F0-9:]\+\)' | awk '{ sub(/inet6? (addr:)? ?/, \"\"); print }'"

# View HTTP traffic
alias sniff="sudo ngrep -d 'en1' -t '^(GET|POST) ' 'tcp and port 80'"
alias httpdump="sudo tcpdump -i en1 -n -s 0 -w - | grep -a -o -E \"Host\: .*|GET \/.*\""

# Canonical hex dump; some systems have this symlinked
command -v hd > /dev/null || alias hd="hexdump -C"

# OS X has no `md5sum`, so use `md5` as a fallback
command -v md5sum > /dev/null || alias md5sum="md5"

# OS X has no `sha1sum`, so use `shasum` as a fallback
command -v sha1sum > /dev/null || alias sha1sum="shasum"

# Empty the Trash on all mounted volumes and the main HDD
# Also, clear Apple’s System Logs to improve shell startup speed
alias emptytrash="sudo rm -rfv /Volumes/*/.Trashes; sudo rm -rfv ~/.Trash; sudo rm -rfv /private/var/log/asl/*.asl"

# Show/hide hidden files in Finder
alias show="defaults write com.apple.finder AppleShowAllFiles -bool true && killall Finder"
alias hide="defaults write com.apple.finder AppleShowAllFiles -bool false && killall Finder"

# Kill all the tabs in Chrome to free up memory
# [C] explained: http://www.commandlinefu.com/commands/view/402/exclude-grep-from-your-grepped-output-of-ps-alias-included-in-description
alias chromekill="ps ux | grep '[C]hrome Helper --type=renderer' | grep -v extension-process | tr -s ' ' | cut -d ' ' -f2 | xargs kill"

# Lock the screen (when going AFK)
alias afk="/System/Library/CoreServices/Menu\ Extras/User.menu/Contents/Resources/CGSession -suspend"

# Reload the shell (i.e. invoke as a login shell)
alias reload="exec $SHELL -l"