title: Why i can't delete the php file?
body: <p>There is php file in my server. I tried to delete it , But Permission denied. It was created by a php virus. </p>
  
  <p><strong>root@host [/home/depotdeb/public_html]# ls -la hl</strong></p>
  
  <p>total 12</p>
  
  <pre><code>d--------- 2 depotdeb depotdeb 4096 Jul 16 11:25 ./ 
  drwxr-x--- 6 depotdeb depotdeb 4096 Jul 21 01:49 ../
  -rwxrwxrwx 1 depotdeb depotdeb   89 Jul 21 01:48 index.php*
  root@host [/home/depotdeb/public_html]# cd hl
  root@host [/home/depotdeb/public_html/hl]# rm -f index.php
  rm: cannot remove `index.php': Permission denied
  </code></pre>
  
  <p><strong>root@host [/home/depotdeb/public_html/hl]# lsattr index.php</strong></p>
  
  <pre><code>-------------e- index.php
  root@host [/home/depotdeb/public_html/hl]# ls -la
  total 12
  d--------- 2 depotdeb depotdeb 4096 Jul 16 11:25 ./
  drwxr-x--- 6 depotdeb depotdeb 4096 Jul 21 01:49 ../
  -rwxrwxrwx 1 depotdeb depotdeb   89 Jul 21 01:48 index.php*
  root@host [/home/depotdeb/public_html/hl]# chattr -i index.php
  root@host [/home/depotdeb/public_html/hl]# lsattr index.php
  -------------e- index.php
  </code></pre>
  
  <p><strong>root@host [/home/depotdeb/public_html/hl]# rm index.php</strong></p>
  
  <pre><code>rm: remove regular file `index.php'? y
  rm: cannot remove `index.php': Permission denied
  root@host [/home/depotdeb/public_html/hl]# cd ../
  </code></pre>
  
  <p><strong>root@host [/home/depotdeb/public_html]# chown depotdeb.depotdeb hl</strong></p>
  
  <pre><code>chown: changing ownership of `hl': Operation not permitted
  </code></pre>
  
  <p><strong>root@host [/home/depotdeb/public_html]# cd hl</strong></p>
  
  <p><strong>root@host [/home/depotdeb/public_html/hl]# ls -il</strong></p>
  
  <pre><code>total 12
  26620397 d--------- 2 depotdeb depotdeb 4096 Jul 16 11:25 ./
    533919 drwxr-x--- 6 depotdeb depotdeb 4096 Jul 21 01:49 ../
  26620398 -rwxrwxrwx 1 depotdeb depotdeb   89 Jul 21 01:48 index.php*
  </code></pre>
  
  <p><strong>root@host [/home/depotdeb/public_html/hl]#</strong></p>