SHELL命令之chown

root@bt:~/test# chown --helpUsage: chown [OPTION]... [OWNER][:[GROUP]] FILE...  or:  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      --dereference      affect the referent of each symbolic link (this is                         the default), rather than the symbolic link itself  -h, --no-dereference   affect each symbolic link 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 `/'  -f, --silent, --quiet  suppress most error messages      --reference=RFILE  use RFILE's owner and group rather than                         specifying OWNER:GROUP values  -R, --recursive        operate on files and directories recursively  -v, --verbose          output a diagnostic for every file processedThe following options modify how a hierarchy is traversed when the -Roption is also specified.  If more than one is specified, only the finalone 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 exitOwner is unchanged if missing.  Group is unchanged if missing, but changedto login group if implied by a `:' following a symbolic OWNER.OWNER and GROUP may be numeric as well as symbolic.Examples:  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".