501  cd humboldt/f12cs279/279lectures/279lect09-2
  502  pets=(dog cat minnow)
  503  echo ${pets[0]}
  504  echo ${pets[1]}
  505  echo ${pets[2]}
  506  echo ${pets[*]}
  507  echo ${pets[?]}
  508  echo ${pets[@]}
  509  quoted-star-at.sh 
  510  stuff=(cat cactus cow pig)
  511  echo stuff[1]
  512  echo $stuff[1]
  513  echo ${stuff[1]}
  514  echo ${#stuff[1]}
  515  echo $stuff
  516  echo $#{stuff[1]}
  517  wc -c five.txt
  518  wc -c six.txt
  519  wc -c seven.txt
  520  ls *.txt
  521  find . -name "*.txt" -size +6c -print
  522  find . -name "*.txt" -size +5c -print
  523  find . -name "*.txt" -size 5c -print
  524  find . -name "*.txt" -size -6c -print
  525  find . -name "*.txt" -size -6c -size 6c -print
  526  find . -name "*.txt" -size +5c -size -7c -print
  527  find . -name "*.txt" -size -6c | -size 6c -print
  528  ls -l
  529  ls
  530  ls test-dir
  531  find . -type f -print
  532  find . -type d -print
  533  find . -type l -print
  534  ls -l .#quoted-star-at.sh 
  535  find . -links +1 -print
  536  find . -user smtuttle -print
  537  find . -user moo -print
  538  groups
  539  find . -group smtuttle -print
  540  find . -group everyone -print
  541  find . -mtime -1 -print
  542  find . -mtime +1 -print
  543  find . -mtime +1 -print
  544  find . -mtime -1 -print
  545  find . -print > all
  546  find . -mtime -1 -print > less-than-a-day
  547  diff all less-than-a-day 
  548  find . -newer five.txt -print
  549  ls -l
  550  chmod 600 five.txt six.txt seven.txt
  551  ls -l *.txt
  552  find . -perm 600 -print
  553  find . -perm -600 -print
  554  cd test-dir
  555  touch try.bak
  556  touch try2.bak
  557  ls
  558  cd ..
  559  ls test-dir
  560  find test-dir -name "*.bak" -type f -exec rm {} \;
  561  ls test-dir
  562  find ~ -type d -name 279\* -print
  563  history > 279lect09-2-history.txt