Linux常用基本命令(file,chown)

ghostwu@dev:~$ dirname ./linux/rename/1.htm 
./linux/rename
ghostwu@dev:~$ file ./linux/rename/1.htm 
./linux/rename/1.htm: empty
ghostwu@dev:~$ echo ‘this is a html file‘ > ./linux/rename/1.htm 
ghostwu@dev:~$ file ./linux/rename/1.htm 
./linux/rename/1.htm: ASCII text
ghostwu@dev:~$ which ls
/bin/ls
ghostwu@dev:~$ file /bin/ls
/bin/ls: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=d0bc0fb9b3f60f72bbad3c5a1d24c9e2a1fde775, stripped
ghostwu@dev:~$ file ./python/
for.py      func3.py    func5.py    global2.py  while1.py   
func2.py    func4.py    func.py     global.py   while.py    
ghostwu@dev:~$ file ./python/for.py 
./python/for.py: ASCII text
ghostwu@dev:~$ file ./python/
./python/: directory

ghostwu@dev:~/linux/rename$ ls
100.htm  19.htm  28.htm  37.htm  46.htm  55.htm  64.htm  73.htm  82.htm  91.htm
10.htm   1.htm   29.htm  38.htm  47.htm  56.htm  65.htm  74.htm  83.htm  92.htm
11.htm   20.htm  2.htm   39.htm  48.htm  57.htm  66.htm  75.htm  84.htm  93.htm
12.htm   21.htm  30.htm  3.htm   49.htm  58.htm  67.htm  76.htm  85.htm  94.htm
13.htm   22.htm  31.htm  40.htm  4.htm   59.htm  68.htm  77.htm  86.htm  95.htm
14.htm   23.htm  32.htm  41.htm  50.htm  5.htm   69.htm  78.htm  87.htm  96.htm
15.htm   24.htm  33.htm  42.htm  51.htm  60.htm  6.htm   79.htm  88.htm  97.htm
16.htm   25.htm  34.htm  43.htm  52.htm  61.htm  70.htm  7.htm   89.htm  98.htm
17.htm   26.htm  35.htm  44.htm  53.htm  62.htm  71.htm  80.htm  8.htm   99.htm
18.htm   27.htm  36.htm  45.htm  54.htm  63.htm  72.htm  81.htm  90.htm  9.htm
ghostwu@dev:~/linux/rename$ find . -name "??.htm" | xargs rm
ghostwu@dev:~/linux/rename$ ls
100.htm  1.htm  2.htm  3.htm  4.htm  5.htm  6.htm  7.htm  8.htm  9.htm

root@dev:/home/ghostwu/linux/rename# ls -l
total 4
-rw-rw-r-- 1 ghostwu ghostwu  0 5月   8 22:24 100.htm
-rw-rw-r-- 1 ghostwu ghostwu 20 5月   8 22:49 1.htm
-rw-rw-r-- 1 ghostwu ghostwu  0 5月   8 22:24 2.htm
-rw-rw-r-- 1 ghostwu ghostwu  0 5月   8 22:24 3.htm
-rw-rw-r-- 1 ghostwu ghostwu  0 5月   8 22:24 4.htm
-rw-rw-r-- 1 ghostwu ghostwu  0 5月   8 22:24 5.htm
-rw-rw-r-- 1 ghostwu ghostwu  0 5月   8 22:24 6.htm
-rw-rw-r-- 1 ghostwu ghostwu  0 5月   8 22:24 7.htm
-rw-rw-r-- 1 ghostwu ghostwu  0 5月   8 22:24 8.htm
-rw-rw-r-- 1 ghostwu ghostwu  0 5月   8 22:24 9.htm
root@dev:/home/ghostwu/linux/rename# chown root.root 1.htm 
root@dev:/home/ghostwu/linux/rename# ls -l 1.htm 
-rw-rw-r-- 1 root root 20 5月   8 22:49 1.htm
root@dev:/home/ghostwu/linux/rename# chown root:root 2.htm
root@dev:/home/ghostwu/linux/rename# ls -l 2.htm
-rw-rw-r-- 1 root root 0 5月   8 22:24 2.htm
root@dev:/home/ghostwu/linux/rename# mkdir -p a/{b,c}
root@dev:/home/ghostwu/linux/rename# tree a
a
├── b
└── c

2 directories, 0 files
root@dev:/home/ghostwu/linux/rename# man tree
root@dev:/home/ghostwu/linux/rename# tree -ug a
a
├── [root     root    ]  b
└── [root     root    ]  c

2 directories, 0 files
root@dev:/home/ghostwu/linux/rename# chown -R ghostwu.ghostwu a
root@dev:/home/ghostwu/linux/rename# tree -ug a
a
├── [ghostwu  ghostwu ]  b
└── [ghostwu  ghostwu ]  c

2 directories, 0 files
root@dev:/home/ghostwu/linux/rename# ls -ld a
drwxr-xr-x 4 ghostwu ghostwu 4096 5月   8 23:01 a
root@dev:/home/ghostwu/linux/rename#