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--- slackware:development [2011/07/10 23:17] – [Ruby gems] slack
+++ slackware:development [2019/11/07 17:58] (current) – external edit 127.0.0.1
@@ Line 13: / Line 13: @@
 Gems commonly used:
   * mini_exiftool (which requires command-line tool [[http://www.sno.phy.queensu.ca/~phil/exiftool/install.html|exiftool]], source package Image-ExifTool-X.XX.tar.gz)
-  * exifr
+  * exifr (now rarely used in favour of mini_exiftool, which has read-write access)
   * fileutils
 <code>
-gem update --system          # may need to be administrator or root
+su  # gems can be installed for one user only but otherwise need to be run as administrator or root
+gem update --system
 gem install mini_exiftool
 </code>