Archive Creation Warnings (GNU tar 1.35)

#### 3.9.2 Keywords applicable for `tar --create`

The following keywords control messages that can be issued while creating archives.

warning: cachedir ¶

  ‘`%s: contains a cache directory tag %s; %s`’

warning: file-shrank ¶

  ‘`%s: File shrank by %s bytes; padding with zeros`’

warning: xdev ¶

  ‘`%s: file is on a different filesystem; not dumped`’

warning: file-ignored ¶

  ‘`%s: Unknown file type; file ignored`’
  ‘`%s: socket ignored`’
  ‘`%s: door ignored`’

warning: file-unchanged ¶

  ‘`%s: file is unchanged; not dumped`’

warning: ignore-archive ¶

  ‘`%s: archive cannot contain itself; not dumped`’

warning: file-removed ¶

  ‘`%s: File removed before we read it`’

warning: file-changed ¶

  ‘`%s: file changed as we read it`’

  Suppresses warnings about read failures, which can occur if files or directories are unreadable, or if they change while being read. This keyword applies only if used together with the `--ignore-failed-read` option. See Ignore Failed Read.