[Sheflug] Process locking

[Keith Powell <nospam [at] g4jvx.screaming.net>]

I Have another problem!

I have been trying to run a packet radio program called TNT, but when I try
logged in as root, all I get is an error message:

Device /dev/ttyS0 is locked by process 621

When logged in as myself, the same error message, but the process is 1438.

What are these processes, and how do I unlock them?

The ttyS0 permissions are Owner: root, Group uucp. I have added myself (users)
to the uucp group. 

Can anyone help, please?

Packet radio is working with another program, but I would like to try this more
comprehensive one.

Many thanks, as usual.

Keith

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