要干凈卸載CentOS上的cmatrix，可按以下步驟操作：
sudo yum remove cmatrix
sudo dnf remove cmatrix
rm ~/.cmatrixrc
rm ~/.cmatrix_history
sudo rm /usr/local/bin/cmatrix
sudo rm -r /usr/local/share/doc/cmatrix
卸載后，可通過which cmatrix驗證，若無輸出則說明已成功卸載。
which cmatrix
