Problems changing file and directory permissions using chmod

southwlm · 03-28-2012, 02:07 PM

I'm having trouble changing permissions in any directory or file, specifically to execute. Here's some info from my terminal and what's happening:

Quote:

lee@lee-desktop:/media/HDD/FortranNotes$ ls -l
total 47
-rw------- 1 lee lee 13233 2012-03-28 14:12 a.out
-rw------- 1 lee lee 451 2012-03-28 13:34 Means
-rw------- 1 lee lee 437 2012-03-28 13:38 Means.f
-rw------- 1 lee lee 451 2012-03-28 13:38 Means.f~
-rw------- 1 lee lee 437 2012-03-28 13:38 Means.f95
-rw------- 1 lee lee 8983 2012-03-28 13:40 Means.x
-rw------- 1 lee lee 523 2012-03-28 14:11 ParabolaLength.f90
-rw------- 1 lee lee 13233 2012-03-28 14:12 ParabolaLength.x

Quote:

lee@lee-desktop:/media/HDD/FortranNotes$ pwd
/media/HDD/FortranNotes
lee@lee-desktop:/media/HDD/FortranNotes$ whoami
lee
lee@lee-desktop:/media/HDD/FortranNotes$ chmod +x Means.x
lee@lee-desktop:/media/HDD/FortranNotes$ ls -l
total 47
-rw------- 1 lee lee 13233 2012-03-28 14:12 a.out
-rw------- 1 lee lee 451 2012-03-28 13:34 Means
-rw------- 1 lee lee 437 2012-03-28 13:38 Means.f
-rw------- 1 lee lee 451 2012-03-28 13:38 Means.f~
-rw------- 1 lee lee 437 2012-03-28 13:38 Means.f95
-rw------- 1 lee lee 8983 2012-03-28 13:40 Means.x
-rw------- 1 lee lee 523 2012-03-28 14:11 ParabolaLength.f90
-rw------- 1 lee lee 13233 2012-03-28 14:12 ParabolaLength.x

As you can see, none of the permissions have changed

I've also tried several different parameter number and letter formats after chmod including but not limited to: 777, 544, go+x, and several others.

Please help

Ser Olmy · 03-28-2012, 02:41 PM

From the pathname, this seems to be an external hard drive of some sort, correct? What type of filesystem is on it?

southwlm · 03-28-2012, 02:47 PM

It's a secondary hard drive used to store data, it's internal. It's not the dard drive Ubuntu is installed as. It's formatted as an NTFS file system.

chrism01 · 03-28-2012, 05:56 PM

The perms you are 'seeing' are Linux's interpretation of NTFS perms (sort of).
Basically, each file-sytem type eg ext3, NTFS has its own unique idea of 'perms'.
The best thing to do is change them in /etc/fstab ie at mount time, as ext3 perms != NTFS perms.

HTH

gdejonge · 03-29-2012, 02:57 PM

If it is a NTFS disk check the mount options and check if it is mounted with ntfs or fuseblk(ntfs-3g). The standard ntfs driver is read-only. You need the ntfs-3g driver if you want rw access.