IF statemnet with DF -h command

[Guest kunalks]

Hello

I have on equestion that i want to check the disk space of mounted drive

 

df -h /path to drive and then i want to write a script which will genrate a messsage if drive space will be above 80% .

 

means

script how i can make if condition which for drive space .

 

if (df -h /path to drive <= 80 %); then

echo "it has only 20 % left"

else

null

fi

can some one help me with this ?

 

 

thanks in advanced

 

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