2 - Raspberry PI Community Projects

# last kernel installed
image=/vmlinux
label=linux
initrd=/initrd.img
read-only
# old kernel
image=/vmlinux.old
label=old
initrd=/initrd.img.old
read-only
# only for Linux/Mac OSX dual-boot
macosx=/dev/sda5
# bsd=/dev/sdaX and macos=/dev/sdaX
# are also possible
Example 8.5
Yaboot configuration file
8.9. Other Configurations: Time Synchronization, Logs, Sharing Access…
The many elements listed in this section are good to know for anyone who wants to master
all aspects of configuration of the GNU/Linux system. They are, however, treated briefly and
frequently refer to the documentation.
8.9.1. Timezone
BACK TO BASICS
Symbolic links
A symbolic link is a pointer to another file. When you access it, the file to
which it points is opened. Removal of the link will not cause deletion of the
file to which it points. Likewise, it does not have its own set of permissions,
but rather retains the permissions of its target. Finally, it can point to any
type of file: directories, special files (sockets, named pipes, device files, etc.),
even other symbolic links.
The ln -s target link-name command creates a symbolic link, named linkname,
pointing to target.
If the target does not exist, then the link is “broken” and accessing it will result
in an error indicating that the target file does not exist. If the link points to
another link, you will have a “chain” of links that turns into a “cycle” if one of
the targets points to one of its predecessors. In this case, accessing one of the
links in the cycle will result in a specific error (“too many levels of symbolic
links”); this means the kernel gave up aer several rounds of the cycle.
Chapter 8 — Basic Configuration: Network, Accounts, Printing…
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