linux chown命令详解

chown命令可以改变文件的拥有者,为change owner的缩写.文件拥有者必须是在/etc/passwd文件中记录的合法用户账号. chown命令不仅可以更改文件的所有者,也可以更改文件的所属用户组,文件所属用户组必须是在/etc/group文件中记录的合法用户组.
[root@initroot ~]# chown [-R] 账号名称 文件或目录 
[root@initroot ~]# chown [-R] 账号名称:用户组名 文件或目录 
[root@initroot ~]# chown cristina
[root@initroot ~]# ls -al
-rwxrw-r--   3 cristina initroot  4096 Dec 17 19:52
[root@initroot ~]# chown root:root
[root@initroot ~]# ls -al
-rwxrw-r--   3 root root  4096 Dec 17 19:52
同时更改文件所有者和所属用户组,也可以使用chown file的形式.即在拥有者与用户组之间用.隔开. 但是有些用户帐号名中可能存在小数点,比如peter.p,这样就会造成混乱. 所以这里建议使用冒号:来隔开拥有者与用户群组.
              chown .initroot

chown为change owner的缩写,用于更改文件的拥有者。owner必须是/etc/passwd中记录的用户名,否则提示报错。



chown [-R] owner filename/dirname
chown [-R] owner:group filename/dirname
chown www initroot.html
chown -R www initroot
chown -R www:www initroot

chown [OPTION]... [OWNER][:[GROUP]] FILE...
chown [OPTION]... --reference=RFILE FILE...
Change the owner and/or group of each FILE to OWNER and/or GROUP.
With --reference, change the owner and group of each FILE to those of RFILE.
-c, --changes like verbose but report only when a change is made
-f, --silent, --quiet suppress most error messages
-v, --verbose output a diagnostic for every file processed
--dereference affect the referent of each symbolic link (this is the default), rather than the symbolic link itself
-h, --no-dereference affect symbolic links instead of any referenced file (useful only on systems that can change the ownership of a symlink)
--from=CURRENT_OWNER:CURRENT_GROUP change the owner and/or group of each file only if its current owner and/or group match those specified here. Either may be omitted, in which case a match is not required for the omitted attribute
--no-preserve-root do not treat '/' specially (the default)
--preserve-root fail to operate recursively on '/'
--reference=RFILE use RFILE's owner and group rather than specifying OWNER:GROUP values
-R, --recursive operate on files and directories recursively
The following options modify how a hierarchy is traversed when the -R option is also specified. If more than one is specified, only the final one takes effect.
-H if a command line argument is a symbolic link to a directory, traverse it
-L traverse every symbolic link to a directory encountered
-P do not traverse any symbolic links (default)
--help display this help and exit
--version output version information and exit
Owner is unchanged if missing. Group is unchanged if missing, but changed to login group if implied by a ':' following a symbolic OWNER.OWNER and GROUP may be numeric as well as symbolic.
chown root /u Change the owner of /u to "root".
chown root:staff /u Likewise, but also change its group to "staff".
chown -hR root /u Change the owner of /u and subfiles to "root".
GNU coreutils online help: Full documentation at: or available locally via:
info '(coreutils) chown invocation'


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