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The sigrand Program

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\f(BIsigrand\fB gives you random signatures
for news posting and mail messages.
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It reads from a file of signatures in a 
fortune database format, and then selects a random one.
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If you're making a news posting, you can even have a per-newsgroup
set of signatures.
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The trick requires a named pipe for your 
.T .signature ;
if your system doesn't support named pipes, then you can't use
this.
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The disadvantage is that this program always has to be running 
so there's something to be read from your 
.T .signature 
file.