安装的程序： agetty, arch,
blockdev, cal, cfdisk, chkdupexe, col, colcrt, colrm, column,
ctrlaltdel, cytune, ddate, dmesg, elvtune, fdformat, fdisk,
fsck.cramfs, fsck.minix, getopt, hexdump, hwclock, ipcrm, ipcs,
isosize, line, logger, look, losetup, mcookie, mkfs, mkfs.bfs,
mkfs.cramfs, mkfs.minix, mkswap, more, mount, namei, pg,
pivot_root, ramsize (链接到 rdev), raw, rdev, readprofile,
rename, renice, rev, rootflags (链接到 rdev), script,
setfdprm, setsid, setterm, sfdisk, swapdev, swapoff (链接到
swapon), swapon, tunelp, ul, umount, vidmode (链接到 rdev),
whereis, write