Rename Unreal Engine's project file: $ rename_uproject.sh "/path/to/your_project.uproject" "new_name"

rename_uproject.sh

#!/bin/bash

if ! [ -f "$1" ]    ; then exit 1 ; fi
if   [ "$2" == "" ] ; then exit 2 ; fi

FULL_PATH=$(realpath "$1")
DIR_NAME=$(dirname "${FULL_PATH}")
FILE_NAME=$(basename -- "${FULL_PATH}")
BASE_NAME="${FILE_NAME%.*}"

pushd "${DIR_NAME}"

    pushd "Config"

        for f in *.ini ; do

            sed -i "s/${BASE_NAME}/$2/g" "${f}"

            if [[ "${f}" =~ "${BASE_NAME}" ]] ; then
                NEW_F=$(echo "${f}" | sed "s/${BASE_NAME}/$2/g")
                mv "${f}" "${NEW_F}"
            fi
        done

    popd

    mv "$1" "$2.uproject"

    rm -rf "DerivedDataCache"
    rm -rf "Intermediate"
    rm -rf "Binaries"
    rm -rf "Build"
    rm -rf "Out"

popd

if [ "$PWD" != "$DIR_NAME" ] ; then
    NEW_DIR=$(echo "${DIR_NAME}" | sed "s/${BASE_NAME}/$2/g")
    if [ "$NEW_DIR" != "$DIR_NAME" ] ; then
        mv "${DIR_NAME}" "${NEW_DIR}"
    fi
fi