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gouranga
Tux's lil' helper
Joined: 05 Aug 2005
Posts: 113
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 Posted: Sun Oct 28, 2007 8:50 am Post subject: Made a bind mount of /usr ,normal user can't exec ..[solved] |
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| Original topic wrote: | | Made a bind mount of /usr ,normal user can't exec /usr/bin/ |
I ran out of space on my hard disk, so I decided to move a few folders and work with bind mounts.
| extract /etc/fstab/: | /mnt/hdb2/home /home none bind 0 0
/mnt/hdb2/opt /opt none bind 0 0
/mnt/hdb2/usr /usr none bind 0 0
/mnt/hdb2/portage /usr/portage none bind 0 0 |
Everything went smoothly, until I decided to move the /usr/ folder.
For user root everything is ok, normal users can't execute fe the command startx, and various other commands.
All the commands a normal user can't execute are in the folder /usr/bin/ (root:root rwx --- ---).
Since I copied the folder with option -r , I thought all permission would be preserved.
Anyone any thought what I did wrong and how I can solve it?
Last edited by gouranga on Thu Dec 27, 2007 7:18 pm; edited 1 time in total |
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toralf
Developer
Joined: 01 Feb 2004
Posts: 3943
Location: Hamburg
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| Posted: Sun Oct 28, 2007 9:19 am Post subject: |
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| Have a look for the umask option of mount. |
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tarpman
Veteran
Joined: 04 Nov 2004
Posts: 1083
Location: Victoria, BC, Canada
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| Posted: Sun Oct 28, 2007 3:40 pm Post subject: |
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| man 1p cp wrote: | -p Duplicate the following characteristics of each source file in
the corresponding destination file:
1. The time of last data modification and time of last access.
If this duplication fails for any reason, cp shall write a
diagnostic message to standard error.
2. The user ID and group ID. If this duplication fails for any
reason, it is unspecified whether cp writes a diagnostic
message to standard error.
3. The file permission bits and the S_ISUID and S_ISGID bits.
Other, implementation-defined, bits may be duplicated as
well. If this duplication fails for any reason, cp shall
write a diagnostic message to standard error.
If the user ID or the group ID cannot be duplicated, the file permis-
sion bits S_ISUID and S_ISGID shall be cleared. If these bits are
present in the source file but are not duplicated in the destination
file, it is unspecified whether cp writes a diagnostic message to stan-
dard error. |
| man 1p cp wrote: | -r Copy file hierarchies. The treatment of special files is imple-
mentation-defined. |
In short, no, cp -r is not enough to preserve permissions and special modes - you need to use cp -r -p, or cp -a.
_________________
Saving the world, one kilobyte at a time. |
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gouranga
Tux's lil' helper
Joined: 05 Aug 2005
Posts: 113
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| Posted: Sun Dec 09, 2007 8:07 pm Post subject: |
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Thx for pointing out what caused my problem. I should have read the man of cp.
Now it's to late.
My /usr/ partition is working back.
| /etc/fstab wrote: | | /mnt/hdb2/usr /usr none bind,umask=777 0 0 |
Maybe this is drastic , but for now I just want things to work.
X wasn't starting up for a normal user.
After a little search, I found out the sticky bit of /usr/bin/Xorg was missing.
| Quote: | | chmod +s /usr/bin/Xorg |
There is still a problem remaining.
I have no sound. Even as root , there is no sound.
I have tried several apps, but I get no sound.
Nothing is logged what could be wrong.
Anyone any thoughts?
update:
| Quote: | By default sound is muted:
alsamixer--> pres m --> problem solved. |
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