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I need help. I have this shell script that will output the hdd status, but the variable $disk is not read in the echo to show result.

 disk="sda1"
 echo -n $(df -hl | grep '$disk' | awk ' {percent+=$5;} END{print percent}'| column -t ):
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In bash, variables are not expanded when put inside single quotes. Use double quotes:

echo -n $(df -hl | grep "$disk")
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