Unix Tools - Check Space Used + Find any files + Check Space Available

1.Check Space Using
$du -sh ${HOME}     // check space used in Home
$du -sh ${HOME}/public_html  // check space used in public_html

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2.Finding file
$find ${HOME} -type f -size +1M -exec ls -ldh {} \ ;      
$find ${HOME} -type f -size +10M -exec ls -ldh {} \ ; | less
$find ${HOME} -type f -size +10M -exec ls -ldh {} \ ; > thelistofbigfiles.txt
$find ${HOME} -name '*.bas' -print
$find ${HOME} -type f -exec grep -il frog {} \;
$find ${HOME} -type f -exec grep -il REM {} \; 

.... +1M >> bigger than 1M
.... > thelisttofbigfiles.txt >> save the result in thelistofbigfile.txt


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3.Check Space Available
$quota -v
Ex: in angsila.cs.buu.ac.th server::
53160083@angsila:~/a$ quota -v
quota: error while getting quota from banbung:/home/staff1 for 53160083 (id 53160083): Success
Disk quotas for user 53160083 (uid 53160083):
     Filesystem  blocks   quota   limit   grace   files   quota   limit   grace
      /dev/sda7      76  2000000 2100000