org: add gitignore file

Signed-off-by: Micky Ching <mickyching@163.com>
org: add english notes

Signed-off-by: Micky Ching <mickyching@163.com>
linux: add linux notes

Signed-off-by: Micky Ching <mickyching@163.com>
network: add bookmarks

Signed-off-by: Micky Ching <mickyching@163.com>