c-montgomery5@acadnx:~/ciss100/ChristionMontgomery$ ls -l
total 20
-rw-rw-r-- 1 c-montgomery5 c-montgomery5  66 Oct 17 16:17 biglist
-rw-rw-r-- 1 c-montgomery5 c-montgomery5  37 Oct 17 16:16 list1
-rw-rw-r-- 1 c-montgomery5 c-montgomery5  29 Oct 17 16:14 list2
-rw-rw-r-- 1 c-montgomery5 c-montgomery5 170 Oct 13 14:38 MontgomeryChristionLL.bak
-rwxrw-rw- 1 c-montgomery5 c-montgomery5 170 Oct 12 16:09 MontgomeryChristionLL.txt
c-montgomery5@acadnx:~/ciss100/ChristionMontgomery$ compress MontgomeryChristionLL.txt
MontgomeryChristionLL.txt: Permission denied
c-montgomery5@acadnx:~/ciss100/ChristionMontgomery$