While look at the /home folder, I found the followings
drwx------ 2 root root 4096 mag 29 2013 .gvfs
-rw-r--r-- 1 root root 58 ott 22 2013 .install4j
drwxr-xr-x 2 root root 4096 ott 1 2013 .rpmdb
-rw-rw-r-- 1 tigerjack89 tigerjack89 58 ott 22 2013 .install4j_jre
What they are? Can I switch them to my_user:my_group? Actually, I don't know if I can safely delete this folder and the previous .install4j file.