Linux Common basic Commands (File,chown)

1,file command function, view the type of file

[Email protected]:~$dirname./linux/rename/1. htm./linux/Rename[email protected]:~$file./linux/rename/1. htm./linux/rename/1. Htm:empty[email protected]:~$Echo 'This is a HTML file'>./linux/rename/1. htm [email protected]:~$file./linux/rename/1. htm./linux/rename/1. Htm:ascii text[email protected]:~$which ls/bin/ls[email protected]:~$file/bin/ls/bin/ls: ELF --bit LSB executable, x86- -, version1(SYSV), dynamically linked, interpreter/lib64/LD-linux-x86- -. So.2, forGnu/linux2.6. +, buildid[sha1]=d0bc0fb9b3f60f72bbad3c5a1d24c9e2a1fde775, Stripped[email protected]:~$file./python/ for. py func3.py func5.py global2.py while1.py func2.py func4.py func.py global.py while. py [email protected]:~$file./python/ for. py./python/ for. Py:ascii text[email protected]:~$file./python/./python/: Directory

2,chown: User and user groups that change files or directories

Usage: chown [option] [Owner]:[group] [file]

Attention:

: Can be used instead of

> Users and groups to be real

Common parameters:-r, recursively modify directory Users and user groups

Delete the two-character file that ends with. html, leaving fewer files, and better looking results

[Email protected]:~/linux/rename$ls -. htm +. htm -. htmPanax Notoginseng. htm $. htm -. htm -. htm the. htm the. htm the. htmTen. htm1. htm in. htm -. htm -. htm About. htm $. htm About. htm the. htm the. htm One. htm -. htm2. htm the. htm -. htm $. htm the. htm the. htm -. htm the. htm A. htm +. htm -. htm3. htm the. htm -. htm the. htm the. htm -. htm94. htm -. htm A. htm to. htm +. htm4. htm -. htm the. htm the. htm the. htm the. htm -. htm at. htm +. htm A. htm -. htm5. htm the. htm +. htm the. htm the. htm the. htm -. htm -. htm the. htmWuyi. htm -. htm6. htm -. htm the. htm the. htm -. htm -. htm the. htm +. htm the. htm A. htm -. htm7. htm the. htm98. htm -. htm -. htm *. htm -. htm -. htm +. htm in. htm the. htm8. htm About. htm -. htm -. htm $. htm $. htm Wu. htm the. htm the. htmBayi. htm -. htm9. Htm[email protected]:~/linux/rename$Find. -name"??. HTM"|Xargs RM[email protected]:~/linux/rename$ls -. htm1. htm2. htm3. htm4. htm5. htm6. htm7. htm8. htm9. htm

2, changing users and groups requires root privileges

[Email protected]:/home/ghostwu/linux/rename#ls-Ltotal4-rw-rw-r--1GHOSTWU GHOSTWU0May8  A: -  -. htm-rw-rw-r--1GHOSTWU GHOSTWU -May8  A: the 1. htm-rw-rw-r--1GHOSTWU GHOSTWU0May8  A: - 2. htm-rw-rw-r--1GHOSTWU GHOSTWU0May8  A: - 3. htm-rw-rw-r--1GHOSTWU GHOSTWU0May8  A: - 4. htm-rw-rw-r--1GHOSTWU GHOSTWU0May8  A: - 5. htm-rw-rw-r--1GHOSTWU GHOSTWU0May8  A: - 6. htm-rw-rw-r--1GHOSTWU GHOSTWU0May8  A: - 7. htm-rw-rw-r--1GHOSTWU GHOSTWU0May8  A: - 8. htm-rw-rw-r--1GHOSTWU GHOSTWU0May8  A: - 9. Htm[email protected]:/home/ghostwu/linux/rename#ChownRoot.root1. htm [email protected]:/home/ghostwu/linux/rename#ls-L1. htm-rw-rw-r--1Root root -May8  A: the 1. Htm[email protected]:/home/ghostwu/linux/rename#ChownRoot:root2. Htm[email protected]:/home/ghostwu/linux/rename#ls-L2. htm-rw-rw-r--1Root root0May8  A: - 2. Htm[email protected]:/home/ghostwu/linux/rename#mkdir-P A/{b,c}[email protected]:/home/ghostwu/linux/rename# Tree Aa├──b└──c2Directories,0Files[email protected]:/home/ghostwu/linux/rename#MansTree[email protected]:/home/ghostwu/linux/rename# Tree-ug Aa├──[root root] b└──[root root] c2Directories,0Files[email protected]:/home/ghostwu/linux/rename#Chown-R GHOSTWU.GHOSTWU a[email protected]:/home/ghostwu/linux/rename# Tree-ug Aa├──[ghostwu GHOSTWU] B└──[GHOSTWU GHOSTWU] C2Directories,0Files[email protected]:/home/ghostwu/linux/rename#ls-LDADRWXR-xr-x4GHOSTWU GHOSTWU4096May8  at: onA[email protected]:/home/ghostwu/linux/rename#

Linux Common basic Commands (File,chown)