jhead: add page (#12001)

* jhead: add page

add german translation

* jhead: fix wording

Co-authored-by: Juri Dispan <juri.dispan@posteo.net>
Co-authored-by: Vitor Henrique <87824454+vitorhcl@users.noreply.github.com>

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Co-authored-by: Juri Dispan <juri.dispan@posteo.net>
Co-authored-by: Vitor Henrique <87824454+vitorhcl@users.noreply.github.com>

pages/linux/jhead.md

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+# jhead
+
+> Image timestamp and EXIF data manipulation.
+> More information: <https://www.sentex.net/~mwandel/jhead/usage.html>.
+
+- Show all EXIF data:
+
+`jhead {{path/to/image.jpg}}`
+
+- Set the file's date and time to the EXIF create date (file creation date will be changed):
+
+`jhead -ft {{path/to/image.jpg}}`
+
+- Set the EXIF time to the file's date and time (EXIF data will be changed):
+
+`jhead -dsft {{path/to/image.jpg}}`
+
+- Rename all JPEG files based on the EXIF create date to `YYYY_MM_DD-HH_MM_SS.jpg`:
+
+`jhead -n%Y_%m_%d-%H_%M_%S *.jpg`
+
+- Rotate losslessly all JPEG images by 90, 180 or 270 based on the EXIF orientation tag:
+
+`jhead -autorot *.jpg`
+
+- Update all EXIF timestamps (Format: +- hour:minute:seconds) (example: forgot to change the camera's time zone - removing 1 hour from timestamps):
+
+`jhead -ta-1:00:00 *.jpg`
+
+- Remove all EXIF data (including thumbnails):
+
+`jhead -purejpg {{path/to/image.jpg}}`