any idea why this is happening

gistfile1.txt

+ rbenv --version
rbenv 0.4.0-15-g0d1f1d0
+ rbenv versions
* 1.9.3-p392 (set by /home/yadrimz/.rbenv/version)
+ rbenv global
1.9.3-p392
+ env
+ grep -E 'PATH|RUBY|BUNDLE|RBENV'
MOZ_PLUGIN_PATH=/usr/lib/mozilla/plugins
PATH=/home/yadrimz/.rbenv/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/yadrimz/.cinstall/launchers/:/usr/bin/core_perl
WINDOWPATH=7
QT_PLUGIN_PATH=/home/yadrimz/.kde4/lib/kde4/plugins/:/usr/lib/kde4/plugins/
+ which gem
which: no gem in (/home/yadrimz/.rbenv/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/yadrimz/.cinstall/launchers/:/usr/bin/core_perl)
+ rbenv which gem
/home/yadrimz/.rbenv/versions/1.9.3-p392/bin/gem
+ cat /etc/gemrc
cat: /etc/gemrc: No such file or directory
+ cat /home/yadrimz/.gemrc
cat: /home/yadrimz/.gemrc: No such file or directory
+ gem env
bash: line 13: gem: command not found