Thank you for fast answer!
Only question is - will it not screw anything up? Becouse it have other commands also, from which some is already in NAS.
"Util-linux is a suite of essential utilities for any Linux system. It contains the following programs: addpart, agetty, blockdev, cal, cfdisk, chfn, chkdupexe, chrt, chsh, col, colcrt, colrm, column, ctrlaltdel, cytune, ddate, delpart, display-services, dmesg, elvtune, fastboot, fasthalt, fdformat, fdisk, flock, fsck.cramfs, fsck.minix, getopt, halt, hexdump, hwclock, initctl, ionice, ipcrm, ipcs, isosize, kill, last, line, logger, login, look, losetup, mcookie, mesg, mkfs, mkfs.bfs, mkfs.cramfs, mkfs.minix, mkswap, more, mount, namei, need, newgrp, partx, pg, pivot_root, provide, ramsize, raw, rdev, readprofile, reboot, rename, renice, reset, rev, rootflags, script, scriptreplay, setsid, setterm, sfdisk, shutdown, simpleinit, swapoff, swapon, taskset, tailf, tunelp, ul, umount, vidmode, vipw, wall, whereis, and write."