暂时先罗列出来，待晚上慢慢写：

rm -f -r -i
last 显式所有历史登录信息
mv
cp
cd
ssh
ftp
gcc
c++
make
perl
scp
telnet
find
xargs
man
route
date
hwclock
fdisk
mkfs.ext2
mkfs.ext3
kudzu
ls
vi/vim
more
less
grep
lsinfo
psinfo
ipcs -a
ps
top
tcpdump
ifconfig
ip
netstat
vmstat
iostat
sar
traceroute
sync
cat
cut
bc
dc
dd
tr
tail
head
sed
awk
init
halt
shutdown
mount
umount