系统默认安装的程序
$ echo $PATH
/usr/bin:/usr/sbin:/bin:/sbin
$ /usr/bin
[ clear envdir hd lpq nc pscan setkeycodes strings top unxz whois
[[ cmp envuidgid head lpr nl pstree setsid sum tr unzip xargs
awk comm expand hexdump lsof nmeter pwdx setuidgid sv traceroute uptime xxd
basename crontab expr hexedit lspci nohup readlink sha1sum svc traceroute6 users xz
bc cryptpw factor hostid lsscsi nproc realpath sha256sum svok truncate uudecode xzcat
beep cut fallocate id lsusb nslookup renice sha3sum tac tty uuencode yes
blkdiscard dc fgconsole install lzcat od reset sha512sum tail ttysize vlock
bunzip2 deallocvt find ipcrm lzma openvt resize showkey taskset udpsvd volname
bzcat diff flock ipcs lzopcat passwd rpm2cpio shred tcpsvd unexpand w
bzip2 dirname fold iperf3 man paste runsv shuf tee uniq wall
cal dos2unix free killall md5sum patch runsvdir smemcap telnet unix2dos wc
chpst du ftpget last mesg pgrep rx softlimit test unlink wget
chrt dumpleases ftpput less microcom pkill script sort tftp unlzma which
chvt eject fuser logger mkfifo pmap seq split time unlzop who
cksum env groups logname mkpasswd printf setfattr ssl_client timeout unshare whoami
$ ls /usr/sbin
add-shell chat deluser fbset i2cdetect inetd nfsroot powertop remove-shell svlogd
addgroup chpasswd dhcprelay fdformat i2cdump killall5 nologin rdate rtcwake telnetd
adduser chroot dnsd fsfreeze i2cget loadfont ntpd rdev sendmail tftpd
arping crond ether-wake ftpd i2cset lpd partprobe readahead setfont udhcpd
brctl delgroup fakeidentd httpd ifplugd nbd-client popmaildir readprofile setlogcons
$ ls /bin
arch cpio ethtool himd.l linux64 mknod pidof rmdir stty vi
ash cttyhack false himm ln mktemp ping rpm su watch
base64 date fatattr hostname login more ping6 run-parts sync zcat
btools dd fdflush hush ls mount pipe_progress scriptreplay tar
busybox df fgrep ionice lzop mountpoint printenv sed touch
cat dmesg fsync iostat makemime mpstat ps setarch true
chgrp dnsdomainname getopt ipcalc mkdir mt pwd setpriv udevadm
chmod dumpkmap grep kbd_mode mke2fs mv reformime setserial udevd
chown echo gunzip kill mkfs.ext2 netstat resume sh umount
conspy ed gzip link mkfs.ext3 nice rev sleep uname
cp egrep himd linux32 mkfs.ext4 nuke rm stat usleep
$ ls /sbin
acpid fdisk ifconfig ipneigh makedevs nameif setconsole tc
adjtimex findfs ifdown iproute mdev pivot_root slattach tunctl
arp freeramdisk ifenslave iprule mkdosfs poweroff start-stop-daemon udhcpc
blkid fsck.minix ifup iptunnel mke2fs raidautorun sulogin uevent
blockdev fstrim init klogd mkfs.minix reboot swapoff vconfig
bootchartd getty insmod loadkmap mkfs.vfat rmmod swapon watchdog
depmod halt ip logread mkswap route switch_root zcip
devmem hdparm ipaddr losetup modinfo run-init sysctl
fbsplash hwclock iplink lsmod modprobe runlevel syslogd