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AIX Version 4.3 Commands Reference, Volume 4

penable Command


Enables or reports the availability of login ports.


penable [ -a ] [ Device ]


The penable command enables normal ports. Normal ports are asynchronous and only allow users to log in. No outgoing use of the port is allowed while it is enabled. The system enables a port by updating an entry in the /etc/inittab file and then sending a signal to the init process. After receiving the signal and reading the updated status entry, the process takes the appropriate action.

Use the Device parameter to specify the ports to be enabled. Permitted values include:

If you do not specify a Device parameter, the penable command reports the names of the currently enabled normal ports.

Note: You must have root user authority to run this command.


-a Enables all normal ports.


To enable all normal ports listed in the /etc/inittab file, enter:

penable -a


/etc/locks Contains lock files for the pshare and pdelay commands.
/usr/sbin/penable Contains the penable command.

Related Information

The init command, pdelay command, pdisable command, phold command, pshare command, pstart command.

The inittab file.

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