#- Create the '.tcz' file
#- Create '.dep' file
#- Create '.list', '.md5.txt' and '.info' files (needed only to submit to the official repository)
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A Meta-extension is a kind of extension that is useful when a set of related utilities or applications that usually work together (like a development chain), are needed to be installed altogether in one time. This will simplify the installation process.

It is based on the idea that the meta-extension itself is sufficient to be a squashed empty file, and only the needed extensions (.tcz) are listed as dependencies in its '.dep' file. As a reminder, a submitted extension requires other than those '.tcz' and '.dep' files, the files '.list', '.md5.txt' and '.info' as well.

#- Create the '.tcz' file

{VERSIONS(nav⇒y,title⇒y,default⇒latest)}

–(latest)—

Use an existing meta-extension such as compiletc.tcz. Or create an empty squashfs archive.

–(before 3.3)—
create an empty directory structure
```
mkdir -p myext/usr/local/share/myext
```
populate it (by creating/adding useful files):
*readme file

echo "This is a meta extension" > myext/usr/local/share/myext/readme

*startup script that is run just after the extension is loaded. (the script name must be the same as the extension name)
Put your commands in * *<code> 'myext/usr/local/tce.installed/myext' </code> * then adjust permissions of both 'tce.installed' directory and 'tce.installed script' to 775 and ownership to root.staff:

sudo chmod -R 775 myext/usr/local/tce.installed
sudo chown -R root.staff myext/usr/local/tce.installed

create the extension (by squashing 'myext' directory )
```
mksquashfs myext myext.tcz
```

{VERSIONS}

#- Create '.dep' file

add to dep list whatever you want

echo "dep1.tcz" >> myext.tcz.dep
echo "dep2.tcz" >> myext.tcz.dep

#- Create '.list', '.md5.txt' and '.info' files (needed only to submit to the official repository)

cd myext
find usr -not -type d > ../myext.tcz.list
md5sum myext.tcz > myext.tcz.md5.txt

and you need to prepare an info file (myext.tcz.info)

take one sample from

http://distro.ibiblio.org/pub/linux/distributions/tinycorelinux/tcz_3x.html

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see for related wiki page and official guide for details:

Table of Contents

#- Create the '.tcz' file

#- Create '.dep' file

#- Create '.list', '.md5.txt' and '.info' files (needed only to submit to the official repository)

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