This guide assumes you are comfortable with the command line.
In the core there is a gzipped cpio archive. This can then be bundled along with the kernel for the boot method you like, for example an ISO image.
The remaster process can be done from inside TC (with advcomp.tcz loaded, and mkisofs-tools.tcz if you want to create an ISO image), or from any other Linux distribution that has the required tools (cpio, tar, gzip, advdef, mkisofs if making an ISO)
Note: advcomp is optional. If not installed, skip all the advdef commands.
First, get the kernel and core.gz from the iso:
sudo mkdir /mnt/tmp sudo mount tinycore.iso /mnt/tmp -o loop,ro cp /mnt/tmp/boot/vmlinuz /mnt/tmp/boot/core.gz /tmp sudo umount /mnt/tmp
If you are going to create an ISO image, instead of copying only two files, copy everything:
sudo mkdir /mnt/tmp sudo mount tinycore.iso /mnt/tmp -o loop,ro cp -a /mnt/tmp/boot /tmp mv /tmp/boot/tinycore.gz /tmp sudo umount /mnt/tmp
Then, extract core.gz for adding/removing something:
mkdir /tmp/extract cd /tmp/extract zcat /tmp/core.gz | sudo cpio -i -H newc -d
Now, the full filesystem is in /tmp/extract. Feel free to add, remove, or edit anything you like.
As per Forum topic - Overlay using cat an interesting alternative to unpacking, editing and repacking files is simply to, using the cat command, concatenate multiple gzipped cpio archives together.
You should be aware that this way results in a slightly slower boot, and likely bigger initramfs size.
For example:
cat microcore.gz Xlibs.gz Xprogs.gz Xvesa.gz > my_xcore.gz
would add a graphical desktop to microcore less a windows manager and menu bar which are currently extensions: flwm_topside.tcz and wbar.tcz but if converted these extensions could be added as well.
Extension .tcz files can be unpacked using the unsquashfs tool and repacked using the gzip tool in order to make the process of adding ready-built extensions to your custom initramfs file system.
If you are remastering 2.x where x ⇐ 1 and you added any kernel modules then execute
sudo chroot /tmp/extract depmod -a 2.6.29.1-tinycore
You must use chroot because “depmod -b /tmp/extract” will not follow the kernel.tclocal symbolic link to find modules under /usr/local.
For versions 2.x where x >= 2 and later (replace the kernel uname with the right one):
sudo depmod -a -b /tmp/extract 2.6.29.1-tinycore
If you added shared libraries then execute
sudo ldconfig -r /tmp/extract
Afterwards, pack it up:
cd /tmp/extract sudo find | sudo cpio -o -H newc | gzip -2 > ../tinycore.gz cd /tmp advdef -z4 tinycore.gz
It is packed at level 2 to save time. advdef -z4 is equivalent to about -11 on gzip.
You now have a modified tinycore.gz. If booting from other than a CD, copy tinycore.gz and the kernel to your boot device.
If you would like to create an ISO image:
cd /tmp mv tinycore.gz boot mkdir newiso mv boot newiso mkisofs -l -J -R -V TC-custom -no-emul-boot -boot-load-size 4 \ -boot-info-table -b boot/isolinux/isolinux.bin \ -c boot/isolinux/boot.cat -o TC-remastered.iso newiso rm -rf newiso
Note 1: the mkisofs command line example above spans three lines, but is actually entered as ONE line
Note 2: the -r option should be added to avoid permissions errors if the new iso is being built outside a TinyCore environment
TC-remastered.iso can now be burned or started in a virtual machine.
You may find ISO Master useful. Its a GUI disk image editing tool, available in the repository as a .tcz extension.