I'm having some trouble with file permissions on an Ubuntu server. I'm using WinSCP to move files to the server. The server will work fine, and then after a while it appears that I no longer have permission to delete a file.
I'm connecting to the server using an account called svadmin, and the root directory of the Apache server is /var/www. Each website has it's own directory under this - i.e.
/var/www/site1
/var/www/site2
This is the output from the ls command...
cd /var/www
ls -al
drwxr-sr-x 4 svadmin svadmin 4096 2009-06-12 14:45 .
drwxr-xr-x 15 root root 4096 2009-05-05 15:47 ..
drwxr-sr-x 4 svadmin svadmin 4096 2009-06-12 15:15 site1
drwxr-sr-x 4 svadmin svadmin 4096 2009-06-12 15:15 site2
My understanding is that this mean the directory owner has read/write/execute? When I connect to the server using the svadmin account, shouldn't I be able to overwrite or delete files in /var/www/site1 or /var/www/site2?
I'm not very familiar with linux file/directory permissions, so have been struggling to work out what I should be doing. Any help would be greatly appreciated!
More info: (thanks for the quick replies!)
Output of ls -al for /var/www/site1
drwxr-sr-x 4 svadmin svadmin 4096 2009-06-12 15:15 .
drwxr-sr-x 4 svadmin svadmin 4096 2009-06-12 14:45 ..
-rw-r--r-- 1 svadmin svadmin 157 2009-05-12 13:23 error.php
-rw-r--r-- 1 svadmin svadmin 158 2009-05-12 13:23 .htaccess
-rw-r--r-- 1 svadmin svadmin 142 2009-05-12 13:23 index.php
drwxr-sr-x 2 svadmin svadmin 4096 2009-05-12 18:40 libraries
Error message When I try and delete the file:
rm admin.php
rm: cannot remove 'admin.php' : Read-only file system
Even more info
Just to add some possibly relevant information... everything was working until yesterday afternoon. At that point a coworker took out the SAN that the virtual machine file was on, and the web server had a less than graceful shutdown.
Answer
This isn't a permissions problem. The two clues are:
- rm: cannot remove 'admin.php' : Read-only file system
- everything was working until yesterday afternoon. At that point a coworker took out the SAN that the virtual machine file was on, and the web server had a less than graceful shutdown.
Somehow the filesystem containing /var/www dropped to "read only" probably when the SAN went away. The output of the mount command should identify this filesystem with a (ro) flag at the end.
The fix is to figure out why it happened, make sure it's corrected, and remount the filesystem rw with this command:
mount -oremount,rw $filesystem
No comments:
Post a Comment