mount - Not root user does not have access on Mounted SSD - Ask Ubuntu

i have ubuntu 16.04 on laptop. administrator/root user "lex".

recently installed sync, program created user "rslsync". have mounted ssd on startup , want sync couple of folder mounted disk, user "rslsync" not have access , hence program sync too.

here fstab (comments removed):

lex@lex-n501jw:~$ sudo cat /etc/fstab  uuid=908d89c2-81bc-4b19-8d70-6300cd1e3334 /               ext4    errors=remount-ro 0       1 uuid=a063-fdd7  /boot/efi       vfat    umask=0077      0       1 uuid=f2b4f98d-8978-4c1a-9d38-202194e0a93c /media/lex/mystorage ext4 defaults 0 2 

as can see ssd mounted on startup on /media/lex/mystorage.

some information permissions:

lex@lex-n501jw:~$ sudo ls -la /media/ total 12 drwxr-xr-x   3 root root 4096 Апр 24  2016 . drwxr-xr-x  26 root root 4096 Окт 22 11:41 .. drwxrwxr-x+  3 lex  lex  4096 Сен 25 11:36 lex  lex@lex-n501jw:~$ sudo ls -la /media/lex/ total 12 drwxrwxr-x+  3 lex  lex  4096 Сен 25 11:36 . drwxr-xr-x   3 root root 4096 Апр 24  2016 .. drwxrwxr-x  23 lex  lex  4096 Окт 25 00:29 mystorage  lex@lex-n501jw:~$ sudo ls -la /media/lex/mystorage/ total 100200856 drwxrwxr-x   23 lex lex         4096 Окт 25 00:29 . drwxrwxr-x+   3 lex lex         4096 Сен 25 11:36 .. drwxrwxr-x    4 lex lex         4096 Окт 23 20:09 bittorrentbox 

information "lex" user:

lex@lex-n501jw:~$ id uid=1000(lex) gid=1000(lex) groups=1000(lex),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),113(lpadmin),128(sambashare),999(docker) 

as can see user , group "lex" has access /media/lex/mystorage/ , see disk in nautilus , ok. added "rslsync" user group "lex" not enough.

when switch user "rslsync" , try (the same error sync gui):

lex@lex-n501jw:~$ su rslsync  password:   rslsync@lex-n501jw:/home/lex$ ls -la /media/ total 12 drwxr-xr-x   3 root root 4096 Апр 24  2016 . drwxr-xr-x  26 root root 4096 Окт 22 11:41 .. drwxrwxr-x+  3 lex  lex  4096 Сен 25 11:36 lex  rslsync@lex-n501jw:/home/lex$ ls -la /media/lex/ ls: cannot open directory '/media/lex/': permission denied 

information "rslsync" user:

rslsync@lex-n501jw:/home/lex$ id uid=999(rslsync) gid=998(rslsync) groups=998(rslsync),46(plugdev),1000(lex) 

after time of researching tried add user "rslsync" group "plugdev" not work can see.

i think there tricky part mounted ssd. have idea how "rslsync" can access /media/lex/mystorage/ ?

as automount disk, default options, fstab, plugdev (or other) groups don't enter picture. standard mount. strange though, doesn't mount root:root.

the permissions on /media/lex , /media/lex/mystorage fine, , given other user member of group lex, should have rwx access both directories.

i suspect blocking access acl set on /media/lex. ls -l output shows + on /media/lex. indicates additional permissions have been set, possibly preventing non-owners accessing path. use getfacl /media/lex see permissions, , setfacl change them.

if want rid of acl, setfacl -b /media/lex should job.