Logging On With the LOGON Command
Use the LOGON command to identify yourself to the system and request use of its resources. When you use the LOGON command, the system requires your TSO/E user ID, which tells the system who wants to use it.
A user ID can be no longer than eight characters and can contain numeric (0-9) and alphabetic (A-Z) characters, but must begin with an alphabetic character. Often a user ID is your name, your initials, your department number, or any combination of valid characters your installation chooses. There are some restrictions on which characters can be used in your user ID, particularly if your system uses JES2. These restrictions are explained in z/OS TSO/E Administration.
Depending on your installation, you might also need to specify other information on the LOGON
command, such as:
- A password that authorizes you to use the system's resources. A password is a group of one to eight characters that you use to prevent other users from using your user ID.
- A procedure name that identifies a procedure that initiates your TSO/E session.
- An account number that your installation uses to keep track of system usage.
- A security label that defines which system resources you can access, and which users you can communicate with. A security label may be 1 to 8 alphabetic or numeric characters or the special characters (#, $, or @). The first character must be alphabetic.