My suggestion is for you to look at the Vatican website where a summary (compendium) of the catechism is published: Compendium of the Catechism of the Catholic Church. Just take a look at section 2 of the book.
Section Two: The Ten Commandments
Chapter One: "You Shall Love the Lord Your God With All Your Heart, With All Your Soul, and With All Your Mind"
The First Commandment: I Am the Lord Your God, You Shall Not Have Other Gods Before Me
The Second Commandment: You Shall Not Take the Name of the Lord Your God in Vain
The Third Commandment: Remember to Keep Holy the Lord's Day
Chapter Two: "You Shall Love Your Neighbour as Yourself"
The Fourth Commandment: Honour Your Father and Your Mother
The Fifth Commandment: You Shall Not Kill
The Sixth Commandment: You Shall Not Commit Adultery
The Seventh Commandment: You Shall Not Steal
The Eighth Commandment: You Shall Not Bear False Witness Against Your Neighbour
The Ninth Commandment: You Shall Not Covet Your Neighbour's Wife
The Tenth Commandment: You Shall Not Covet Your Neighbour's Possessions
BTW these are not the Ten Commandments of the Roman Catholic Church. These are God's commandments given to Moses and to His chosen people.