Getting the shell script:
wget launchpadlibrarian.net

Running:
sh tuning-primer.sh

!/bin/sh

for dbname in mysqlshow | awk '{print $2}'
do
mysqlcheck $dbname ticket -Fq
done

call this shell script and find the errors

time sh check.sh | grep error

Brace expansion is used to generate arbitrary strings. For e.g.
ls mysql*.0000{1..3}

will list the files like mysql.00001 mysql.00002 & mysql.00003

This can also be used for something like this...

cp mysql.log{,.bak}

cp mysql.log mysql.log.bak

cp $da.log{.bak,}

cp 2010-05-28.log.bak 2010-05-28.log

!/bin/sh

unset REPLY
until [[ $REPLY ]]; do read -p "Enter your name: "
done
echo "welcome $REPLY"