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#!/bin/bash
OPTIONS="Hello Quit"
select opt in $OPTIONS; do
if [ "$opt" = "Quit" ]; then
echo done
exit
elif [ "$opt" = "Hello" ]; then
echo Hello World
else
clear
echo bad option
fi
done
If you run this script you'll see that it is a
programmer's dream for text based menus. You'll probably notice
that it's very similar to the 'for' construction, only rather
than looping for each 'word' in $OPTIONS, it prompts the user.
#!/bin/bash
if [ -z "$1" ]; then
echo usage: $0 directory
exit
fi
SRCD=$1
TGTD="/var/backups/"
OF=home-$(date +%Y%m%d).tgz
tar -cZf $TGTD$OF $SRCD
What this script does should be clear to you. The expression
in the first conditional tests if the program has received an argument
($1) and quits if it didn't, showing the user a little usage message.
The rest of the script should be clear at this point.
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