screenshot on linux mint with keyboard shortcut

the 2008 imac with linux mint cant cmd shift 4 to screenshot like on mac os :( cmd key triggers the menu. I did some digging around found out about remapping keys with xbindkeys by editing the .xbindkeysrc with vim. found a cli screen shot program called scrot "scrot '/home/mint/Pictures/screenshots/%Y-%m-%d_%H-%M-%S.png' -s" Control + Shift + 4