Add some basic shortcut key-bindings

Signed-off-by: Chengwei Yang <chengwei.yang.cn@gmail.com>
How to use juniper VPN connection

Signed-off-by: Chengwei Yang <chengwei.yang.cn@gmail.com>
Why terminal doesn't read ~/.bashrc by default

Signed-off-by: Chengwei Yang <chengwei.yang.cn@gmail.com>
ignore some files

Signed-off-by: Chengwei Yang <chengwei.yang.cn@gmail.com>
Useful package manager for Mac

Signed-off-by: Chengwei Yang <chengwei.yang.cn@gmail.com>