If you need to work on cluster, is nice to have syncronized terminals to send the same commands in parallel.

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In onore della laurea di una mia cara amica, ripubblico e segnalo una serie di "storie universitarie", che sono sicuro strapperanno più di un sorriso. Buona lettura!

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Sometimes I need to build a small script to delete a huge set of tables of a schema.

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Use the sed -i command

sed -i.BAK 's|foo|bar|g' files # -i does in-place replacement
perl -pi.bak -e 's|foo|bar|g' files                # or
perl -pi.bak -e 's|foo|bar|g' `find /pathname -name "filespec"`

Perl is the preferred way, but on some production system you must use the old good sed. For some tips on sed take a look to its faq. Another very powerful command is xargs. Xargs is a rapid  way to process files containing spaces, using  a  combo with find:

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Hi dear spammers, I am an announce.

I love you so much I have decided to auto delete spam comments not already published.

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