Linux administration, no access to file?

Question

linux

[[email protected] nightmare]$ ls
partial.php  test.txt
[[email protected] 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
[[email protected] nightmare]$ groups
nightmare0 apache
[[email protected] nightmare]$ rm test.txt
rm: remove write-protected regular file ‘test.txt’? y
rm: cannot remove ‘test.txt’: Permission denied
[[email protected] nightmare]$

Why is that? The test.txt file has the apache group as does the nightmare0 user , but nightmare0 cannot delete the file.

Answer 1

In the answers, they correctly sent me to learn Linux rights.
But they forgot to note that deleting a file is not an operation on the file, but on the folder in which it lies. You need write access to it to create or delete files.
Therefore, file permissions do not play here at all - -rw-r--r--/apache/apache.
And the folder permissions decide: drwxr-xr-x/apache/apache.
In which, however, the user, by belonging to the apache group, has the same access - read only.

Answer 2

The test.txt file has the apache group as does the nightmare0 user, but nightmare0 cannot delete the file.

It is not enough to have a group - you also need to allow the group to do something. Read more about the Linux permissions system, well.

Answer 3

drwxr-xr-x 2 apache apache 41 Feb 26 13:26 .
the rights of the apache rx group, that is, you cannot edit the directory.
Deleting a file is changing the directory.
You need to either be an apache / root user, or add rwxrwxr-x permissions to the folder

Answer 4

And what is wrong? Root and owner rw group read others read.

Answer 5

Well, the key point: to delete a file, you need to have write permissions to its parent directory

drwxr-xr-x 2 apache     apache       41 Feb 26 13:26 .