find -name *.c

find -size +280000

fs

findfs

ls -all

vim kk.c

ifconfig

cd mkdir

pwd

/etc/init.d

ln

chmod

su

cp

mv

tar

7z

tar jxvf

date

clock

cat /proc/cpuinfo

head tail more lell grep |

ar attr

bind

w

whois

whereis

whoami

gcc -o kk kk.c

make menuconfig  make make dep

insmod  lsmod  rmmod

/bin/vsftp start