index t30
#  /A
#    |_ /B
#    |   |_ n1
#    |_ n2
#    |_ n3
#  /C
#    |_ n4
#    |_ n5
#  /n1
#  /D
#  /E
#   
touch /A/B/n1 /A/n2 /A/n3 /C/n4 /C/n5 n1
mkdir D E
tree
index t31
#  1. Delete /A/B/n1
#      Rename the directory /C to /A/B/n1
rm /A/B/n1
mv /C /A/B/n1
tree -o
index t32
#  2. Append data data to /A/B/n1
#      Delete /A/B/n1
#      Rename file /n1 to /A/B/n1
touch /A/B/n1
rm /A/B/n1
mv n1 /A/B/n1
tree -o
log
index t33
exit

