title: not able to change file permission in linux
body: <p>This seems a very basic question but I am not able to change the file permission in linux.</p>
  
  <p>I am a root user, I can change the file permission if I copy the same file in the Filesystem of the installed linux. I can't change the permissions to files/ folder which are kept on the other partition.</p>
  
  <p>Please give me a term to at-least how to start debugging, I don't see any errors as well. There is no sticky bits set.
  Help me by giving steps which I can follow to debug this issue.</p>
  
  <h2>This is the output of df -h</h2>
  
  <pre><code>Filesystem                                              Size  Used Avail Use% Mounted on
  rootfs                                                   46G   22G   22G  50% /
  udev                                                     10M     0   10M   0% /dev
  tmpfs                                                   393M  1.9M  391M   1% /run
  /dev/disk/by-uuid/49c0f59c-9bb3-4755-8c1f-06da6159865e   46G   22G   22G  50% /
  tmpfs                                                   5.0M     0  5.0M   0% /run/lock
  tmpfs                                                   786M  944K  785M   1% /run/shm
  /dev/sda2                                                46G   43G  1.3G  98% /home
  /dev/sda6                                               278G  122G  157G  44% /media/056AFEAB51156F3F___
  /dev/sda3                                                92G   16G   72G  18% /media/3a7cb05d-b822-4f3e-a330-da91013b605c_
  </code></pre>
  
  <hr>
  
  <h2>Output for ls -al</h2>
  
  <pre><code>drwx------ 1 prasenjit prasenjit     0 Oct 21 15:08 abi
  drwx------ 1 prasenjit prasenjit  4096 Oct 21 15:08 art
  drwx------ 1 prasenjit prasenjit  4096 Oct 21 15:08 bionic
  drwx------ 1 prasenjit prasenjit     0 Oct 21 15:08 bootable
  drwx------ 1 prasenjit prasenjit  4096 Oct 21 15:08 build
  drwx------ 1 prasenjit prasenjit  4096 Oct 21 15:08 cts
  drwx------ 1 prasenjit prasenjit  4096 Oct 21 15:08 dalvik
  drwx------ 1 prasenjit prasenjit     0 Oct 21 15:08 developers
  drwx------ 1 prasenjit prasenjit  4096 Oct 21 15:08 development
  drwx------ 1 prasenjit prasenjit  4096 Oct 21 15:09 device
  drwx------ 1 prasenjit prasenjit     0 Oct 21 15:09 docs
  drwx------ 1 prasenjit prasenjit 36864 Oct 21 15:17 external
  </code></pre>
  
  <hr>
  
  <h2>output for lsattr :</h2>
  
  <pre><code>lsattr: Inappropriate ioctl for device While reading flags on ./abi
  lsattr: Inappropriate ioctl for device While reading flags on ./art
  lsattr: Inappropriate ioctl for device While reading flags on ./bionic
  lsattr: Inappropriate ioctl for device While reading flags on ./bootable
  lsattr: Inappropriate ioctl for device While reading flags on ./build
  lsattr: Inappropriate ioctl for device While reading flags on ./cts
  lsattr: Inappropriate ioctl for device While reading flags on ./dalvik
  lsattr: Inappropriate ioctl for device While reading flags on ./developers
  lsattr: Inappropriate ioctl for device While reading flags on ./development
  lsattr: Inappropriate ioctl for device While reading flags on ./device
  lsattr: Inappropriate ioctl for device While reading flags on ./docs
  lsattr: Inappropriate ioctl for device While reading flags on ./external
  </code></pre>
  
  <hr>
  
  <h2>Output of mount</h2>
  
  <pre><code>sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
  proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
  udev on /dev type devtmpfs (rw,relatime,size=10240k,nr_inodes=210750,mode=755)
  devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
  tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=401948k,mode=755)
  /dev/disk/by-uuid/49c0f59c-9bb3-4755-8c1f-06da6159865e on / type ext4 (rw,relatime,errors=remount-ro,data=ordered)
  tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)
  tmpfs on /run/shm type tmpfs (rw,nosuid,nodev,noexec,relatime,size=803880k)
  /dev/sda2 on /home type ext4 (rw,relatime,data=ordered)
  rpc_pipefs on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)
  fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime)
  /dev/sda6 on /media/056AFEAB51156F3F___ type fuseblk (rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096)
  /dev/sda3 on /media/3a7cb05d-b822-4f3e-a330-da91013b605c_ type ext4 (rw,nosuid,nodev,relatime,data=ordered,uhelper=udisks)
  </code></pre>
  
  <hr>
  
  <p>Let me know other commands which can help me to debug.
  Any help is appreciated. </p>
  
  <p>Thanks in advance</p>