# CD
alias ..='cd ../'
alias ...='cd ../../'
alias ....='cd ../../../'
alias .....='cd ../../../../'

# Go up [n] directories
function up()
{
    local cdir="$(pwd)"
    if [[ "${1}" == "" ]]; then
        cdir="$(dirname "${cdir}")"
    elif ! [[ "${1}" =~ ^[0-9]+$ ]]; then
        echo "Error: argument must be a number"
    elif ! [[ "${1}" -gt "0" ]]; then
        echo "Error: argument must be positive"
    else
        for i in {1..${1}}; do
            local ncdir="$(dirname "${cdir}")"
            if [[ "${cdir}" == "${ncdir}" ]]; then
                break
            else
                cdir="${ncdir}"
            fi
        done
    fi
    cd "${cdir}"
}