oerr [COMPONENT] [ERRORCODE]

oracle ~ $ oerr ora 12345
12345, 00000, "user %s lacks CREATE SESSION privilege in database link (linkname %s)"
// *Cause: There are several possible causes for this message:
//         First, you will get this message if your username in the
//         second database specified was not granted the
//         CREATE SESSION system privilege.
//         Second, you will get this message if the username specified
//         in the connect string of the database link definition was
//         not granted the CREATE SESSION system privilege.
// *Action: The action you take depends upon the cause of the message:
//         In the first case, ensure that your username in the secondary
//         database was granted the CREATE SESSION system privilege.
//         In the second case, ensure the username specified in the
//         connect string of the database link definition was granted
//         the CREATE SESSION system privilege in the secondary database.
oracle ~ $
oracle ~ $ oerr tns 00000
00000, 00000, "Not An Error"
// *Cause:  Everything is working as it should.
// *Action: Don't worry: Be happy.
oracle ~ $

C:\>foerr tns 0

TNS-00000: Not An Error
 *Cause:  Everything is working as it should.
 *Action: Don't worry: Be happy.