can't execute my old file, same user, only rw

Question

(use this trick, and didn't work's)

After reinstall my ubuntu from 16.04 to 14.04. My C program can't be executed. My username is the same.

I have used:

chmod +x ./hello 
chmod -R 775 hello

I am still getting:

bash: ./hello: Permission denied

I use GUI, to tick execute or change permission group or kind, it suddenly back after few second. But I can read and write every file inside it, when I compile it again, then execute, it's always didn't works.

How can I solve it?

(read many other question, but still didn't works for me..)

$ ls -l
total 160
-rw------- 1 reigin reigin  1323 Agu 31 07:14 bentuk.class
-rw------- 1 reigin reigin  2438 Agu 31 07:14 bentuk.java
-rw------- 1 reigin reigin  1290 Sep  1 04:16 bentukq.class
-rw------- 1 reigin reigin  2183 Sep  1 04:16 bentukq.java
-rw------- 1 reigin reigin   644 Agu 29 05:09 deret.class
-rw------- 1 reigin reigin   841 Agu 29 05:09 deret.java
-rw------- 1 reigin reigin  1471 Agu 27 04:30 Fkonversi.class
-rw------- 1 reigin reigin  8519 Sep 20 14:44 hello
-rw------- 1 reigin reigin   264 Sep 20 09:06 hello.c
-rw------- 1 reigin reigin   262 Agu 25 23:52 hello.c~
-rw------- 1 reigin reigin   417 Agu 26 00:00 hello.class
-rw------- 1 reigin reigin   281 Agu 26 00:00 hello.java
-rw------- 1 reigin reigin   182 Sep  1 18:13 HelloWorld.java
-rw------- 1 reigin reigin  8612 Agu 26 01:20 jumlah
-rw------- 1 reigin reigin   484 Agu 26 01:20 jumlah.c
-rw------- 1 reigin reigin   557 Agu 27 05:43 jumlah.class
-rw------- 1 reigin reigin   645 Agu 26 00:22 jumlah.java
drwx------ 1 reigin reigin  4096 Sep 17 12:46 lat2
drwx------ 1 reigin reigin  4096 Sep 17 12:46 lat3
-rw------- 1 reigin reigin  8517 Sep 20 09:23 new
-rw------- 1 reigin reigin   250 Sep 20 09:23 new.c
-rw------- 1 reigin reigin 25424 Agu 31 07:18 noted.txt
drwx------ 1 reigin reigin  4096 Sep 20 11:42 ong
-rw------- 1 reigin reigin  1006 Agu 31 06:16 suhu.class
-rw------- 1 reigin reigin  1354 Agu 31 06:15 suhu.java
drwx------ 1 reigin reigin     0 Sep 17 12:46 suhuu
-rw------- 1 reigin reigin   645 Agu 26 10:17 terbesar.class
-rw------- 1 reigin reigin   865 Agu 26 01:29 terbesar.java
-rw------- 1 reigin reigin  8664 Sep  1 11:24 test
-rw------- 1 reigin reigin   266 Sep  1 11:24 test.c
-rw------- 1 reigin reigin  8758 Agu 29 03:36 tigainteger
-rw------- 1 reigin reigin  2343 Agu 29 03:30 tigainteger_.c
-rw------- 1 reigin reigin  2345 Agu 29 03:34 tigainteger.c
-rw------- 1 reigin reigin  1184 Agu 27 13:46 tigainteger.class
-rw------- 1 reigin reigin  2776 Agu 27 13:09 tigainteger.java

grep result :

# mount | grep 'on /media
/dev/sda7 on /media/reigin/data type fuseblk (rw,nosuid,nodev,allow_other,default_permissions,blksize=4096)

Answer 1

The problem here is that the filesystem is NTFS, which doesn't support Unix permissions. You need to use the fmask option of mount, which sets the permissions of all files on the mounted drive while it is mounted.

Note that you need to have root permissions for these commands to work.

First, unmount the drive if needed:

umount /dev/sda7

If it gives an error like:

umount: /dev/sda7: not mounted

just ignore it.

Next, create a directory to be your mountpoint:

mkdir -p /media/reigin/data

Finally, mount the drive:

 mount -o fmask=0022 /dev/sda7 /media/reigin/data

This will assign 755 permissions to every file on the drive (but directories will still have default permissions). Note that this is not permanent; you'll have to do this every time you mount the drive.