I had a problem with my mac where I couldn't save any kind of file on the disk anymore. I had to reboot OSX lion and reset the permissions on files and acls.
But now when I want to commit a repository I get the following error from ssh:
Permissions 0777 for '/Users/username/.ssh/id_rsa' are too open.
It is recommended that your private key files are NOT accessible by others.
This private key will be ignored.
What permissions levels should i give to the id_rsa file?
別人那邊拷貝過來的密鑰，很多時候無法直接登錄ssh，會報錯permissions are too open。
這個時候需要修改id_rsa的權限，一般修改為600就好。
Keys need to be only readable by you:
chmod 400 ~/.ssh/id_rsa
600 appears to be fine as well (in fact better in most cases, because you don't need to change file permissions to edit it).