[nightmare0@nightmare nightmare]$ ls
partial.php test.txt
[nightmare0@nightmare nightmare]$ ls -la
total 8
drwxr-xr-x 2 apache apache 41 Feb 26 13:26 .
drwxr-xr-x 5 root root 53 Feb 26 12:38 ..
-rw-rw-r-- 1 nightmare0 nightmare0 1753 Feb 26 13:06 partial.php
-rw-r--r-- 1 apache apache 13 Feb 26 13:26 test.txt
[nightmare0@nightmare nightmare]$ groups
nightmare0 apache
[nightmare0@nightmare nightmare]$ rm test.txt
rm: remove write-protected regular file ‘test.txt’? y
rm: cannot remove ‘test.txt’: Permission denied
[nightmare0@nightmare nightmare]$