Creating .iso file from several files (let's say folder) is very simple in Linux. First you have to install mkisofs utility:

$ sudo zypper install mkisofs

Then you will need put all your files you want to put in .iso file in a separate folder. In my case, I neede just to rebuild existing bootable .iso file. So, my folder with files is '/home/dima/yobanypizdec'.

Combining files into one .iso file

Then we will you mkisofs utility:

$ mkisofs -o ebatkolotit.iso /home/dima/yobanypizdec/

Where:

• ebatkolotit.iso  - the name of future .iso file. You can just choose what you like/need
• /home/dima/yobanypizdec  - full path to a folder (yobanypizdec), where are files are stored (and waiting for becoming proud .iso file)
• -o (or -output can be used as well)  - is an option, which allows you to define name (and location) of output file. In my example you see the name of output .iso file after an -o option.