centosにyumでgdを入れたかったが # yum -y install php-gd すると Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package php-gd.i386 0:5.1.6-27.el5_5.3 set to be updated --> Processing Dependency: php-common = 5.1.6-27.el5_5.3 for package: php-gd --> Finished Dependency Resolution php-gd-5.1.6-27.el5_5.3.i386 from updates has depsolving problems --> Missing Dependency: php-co