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ある特定の所有者ファイルを別ユーザへ変更する

Posted at

Gnu版chown限定っぽい。

あるディレクトリ以下の全ての特定ユーザ( Owner )の所有物を別ユーザに変更する。

> # この例だと、Owner apache の所有物を全て root に変更する
> chown -R . --from=apache: root

Gnu Chown の man は古いままだし info コマンドはなんか使いにくいし日本語訳はどこにあるのかわからないし…

参考

> chown --help
Usage: 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
                         ここで指定した現在の所有者やグループと一致した
                         ファイルについてのみ、所有者やグループを変更する。
                         いずれか一方は省略できる。その場合、省略された方の
                         属性については一致の検査を行なわない。
      --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 processed

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     この使い方を表示して終了
      --version  バージョン情報を表示して終了

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.

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".

Report chown bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report chown translation bugs to <http://translationproject.org/team/>
For complete documentation, run: info coreutils 'chown invocation'
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