export declare const hostUtil: {
    getHosts(format?: boolean): any;
    bak(bakFile?: string): void;
    restoreBak(bakFile?: string): void;
    check(ip: string, host: string): boolean;
    upsert(ip: string, host: string): void;
    remove(host: string, ip?: string): void;
    setHosts(hosts: string[]): void;
    cleanHosts(hosts: string[]): void;
    removeHosts(hosts: string[]): void;
};