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$ awk '{ ("date +%s -d " q $1 s $2 s $3 q )| getline dt; print dt }' q='"' s=' ' <<<'1 day ago'
1371735965
$ awk '{ ("date +%s -d " q $1 s $2 s $3 q )| getline dt; print dt }' q='"' s=' ' <<<'10...

Yes, use this one:

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awk 'FNR == 1 && /perl/'

If you have GNU awk:


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awk 'FNR == 1 && /perl / { print; nextfile }'

If you're not dead set on using gxmessage, you could start an xterm and execute a small script which pulls random data from a file. Here's a sample that computes a random line to pull from a cookie...