1.cd commond
a. cd usr 切换到该目录下usr目录 b. cd ../ 切换到上一层目录 c.cd / 切换到系统根目录 d. cd ~ 切换到用户主目录 e. cd - 切换到上一个所在目录
mkdir directory_name
ll or ls
find directory parameter
eg find /root associate with test directory find /root -name ‘test*‘
mv old_directory_name new_directory_name
mv directory_name directory_location
mv test /usr
cp -r /usr/copy_directory /temp/copy_to_directory
rm -rf directory or rm -r directory
  a.create file commond
    touch  file_name.txt
  b.select file  commond
cat file_name.txt show finally screen
more file_name.txt exit press q
less file_name.txt pagedown pageup exit with q
tail -10 file_name.txt show last ten exit ctrl + c
c.modify file content
    vi  a.txt   entry  i/o/a   exit and keep  esc  + : + wq  exit and nokeep  esc+:+q+!
  a.packing and compression files
tar after(packing_and_compressing_file_name) packing_file
tar -zcvf name.tar.gz a.txt b.txt c.txt or tar -zcvf name.tar.fz /test/*
      z  use gizp commond compressing  c packing_file   v view_complier_process  f  point_file_name
b.decompression commond
    tar -xvf  name.tar.gz     x   stand_for_decompression
tar -xvf name.tar.gz -C /usr -C indicate_unzip_location
  a.show current location
pwd
  b.search character in file commond
grep character_in_file sudo.conf
grep character sudo.conf --color default color is red
c.pipe commond
    pipe commond is  before output comm  ond as current directory input  commond 
    ps -ef | grep system   a.select all process  b.select process with character system
  d.look process
ps -ef
  e.kill process
kil -9 pid pid is find from ps -ef
  f.network communication commond
    1.look up current network card information
ifconfing
2.query communication information
ping ip_address
3.check current system ports use information
netstat -an
原文:http://www.cnblogs.com/yjhlsbnf/p/7666952.html