I agree with Scott that it is easier to create backups (and I’m not saying that because I just happened to provide a backup program – see my signature).
However if you want to create an iso then there certainly are ways for that.
Unfortunately you don’t really tell us what linux distribution you are using.
Search for something called remastersys if it is ubuntu based.
Hope this helps,
| Author of Vimalin. The virtual machine Backup app for VMware Desktop Products
| Vimalin : Automated backups for VMware Fusion and VMware Workstation Professional
| More info at https://www.vimalin.com
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