Untarred a package in / and now my permissions are boned [resolved]

black hole sun · 11-05-2009, 12:29 AM

As the title says. Untarred the chrome-64 binary in / after unzipping it with Ark. Boy was that silly.

I'm not sure what my permissions should look like now, nor how to fix them. Nobody but root can now log in, everything is "Permission denied."

Here's ls -l /:

Code:

drwxr-xr-x   2 root root  4096 2009-10-25 15:58 bin/
drwxr-xr-x   3 root root  4096 2009-11-03 20:06 boot/
drwxr-xr-x  14 root root 14180 2009-11-04 13:02 dev/
drwxr-xr-x  60 root root  4096 2009-10-23 12:37 etc/
drwxr-xr-x   4 root root  4096 2009-09-24 21:04 home/
drwxr-xr-x   5 root root  4096 2009-10-22 15:09 lib/
drwxr-xr-x   2 root root  4096 2009-10-25 15:58 lib64/
drwx------   2 root root 16384 2009-09-18 07:53 lost+found/
drwxr-xr-x  16 root root  4096 2009-11-04 13:02 media/
drwxr-xr-x   5 root root  4096 2009-10-27 17:27 mnt/
drwxr-xr-x   5 root root  4096 2009-10-23 12:37 opt/
dr-xr-xr-x 134 root root     0 2009-11-04 05:01 proc/
drwxr-xr-x  17 root root  4096 2009-11-04 21:25 root/
drwxr-xr-x   2 root root  4096 2009-11-02 16:48 sbin/
drwxr-xr-x   2 root root  4096 2007-04-07 16:30 srv/
drwxr-xr-x  12 root root     0 2009-11-04 05:01 sys/
drwxrwxrwt  11 root root 12288 2009-11-04 21:26 tmp/
drwxr-xr-x  19 root root  4096 2009-10-23 12:37 usr/
drwxr-xr-x  14 root root  4096 2009-10-10 00:03 var/

What should they be?

Affected directories:

Code:

./                                                          
./usr/                                                      
./usr/bin/                                                  
./usr/share/                                                
./usr/share/man/                                            
./usr/share/man/man1/                                       
./usr/share/man/man1/google-chrome.1                        
./usr/share/gnome-control-center/                           
./usr/share/gnome-control-center/default-apps/              
./usr/share/gnome-control-center/default-apps/google-chrome.xml
./etc/                                                         
./etc/cron.daily/                                              
./etc/cron.daily/google-chrome                                 
./opt/                                                         
./opt/google/                                                  
./usr/bin/google-chrome

slackd · 11-05-2009, 12:48 AM

happened to me once. i fudged my /home directory and could not login.

check if you have changed the ownership of your /home/<user> directory.

Code:

ls -l /home/<user>

if the owner is root, pass this command in the terminal as root:

Code:

chown -R <user> /home/<user>

black hole sun · 11-05-2009, 12:56 AM

Quote:

Originally Posted by slackd

happened to me once. i fudged my /home directory and could not login.

check if you have changed the ownership of your /home/<user> directory.

Code:

ls -l /home/<user>

if the owner is root, pass this command in the terminal as root:

Code:

chown -R <user> /home/<user>

Did that. Changed it to me, and owner is users. But /bin/bash always just says

Cannot execute /bin/bash: Permission denied

black hole sun · 11-05-2009, 12:59 AM

Quote:

Originally Posted by black hole sun

Did that. Changed it to me, and owner is users. But /bin/bash always just says

Cannot execute /bin/bash: Permission denied

Which doesn't make sense since

root@darkstar:/bin# ls -l bash
-rwxr-xr-x 1 root root 803320 2008-09-21 08:56 bash*

I think something's permission is fudged so bash can't execute...

slackd · 11-05-2009, 01:05 AM

well, you could try

Code:

chmod -R 777

. on your home dir.

and give the output to this:

Code:

[sam@slackd] >$ ls -l /bin|grep bash
-rwxr-xr-x 1 root root 785K 2008-09-21 21:26 bash*
lrwxrwxrwx 1 root root    4 2009-10-06 14:34 sh -> bash*

black hole sun · 11-05-2009, 01:07 AM

Quote:

Originally Posted by slackd

well, you could try

Code:

chmod -R 777

.

and give the output to this:

Code:

[sam@slackd] >$ ls -l /bin|grep bash
-rwxr-xr-x 1 root root 785K 2008-09-21 21:26 bash*
lrwxrwxrwx 1 root root    4 2009-10-06 14:34 sh -> bash*

-rwxrwxrwx 1 root root 803320 2008-09-21 08:56 bash*
lrwxrwxrwx 1 root root 4 2009-09-18 08:02 sh -> bash*

Still no go . . .

I accidentally 777'd the bash file per your unedited suggestion

black hole sun · 11-05-2009, 01:10 AM

Quote:

Originally Posted by black hole sun

-rwxrwxrwx 1 root root 803320 2008-09-21 08:56 bash*
lrwxrwxrwx 1 root root 4 2009-09-18 08:02 sh -> bash*

Still no go . . .

I accidentally 777'd the bash file per your unedited suggestion

I changed bash back to:

-rwxr-xr-x 1 root root 803320 2008-09-21 08:56 bash*...

root@darkstar:/bin# login

darkstar login: paul
Password:
Unable to cd to "/home/paul"

slackd · 11-05-2009, 01:12 AM

sorry abt that, did you try the home dir thing?

black hole sun · 11-05-2009, 01:15 AM

Quote:

Originally Posted by slackd

sorry abt that, did you try the home dir thing?

No problem, yes I did.

black hole sun · 11-05-2009, 01:17 AM

Quote:

Originally Posted by black hole sun

No problem, yes I did.

I even added a "test" user. Same deal - unable to cd to home directory...

I don't understand how untarring a package can create such havok.

black hole sun · 11-05-2009, 01:22 AM

I fixed it; googling led me to this:
http://www.linuxfromscratch.org/pipe...ly/016455.html

My / had the wrong permissions.
But I have a question -

What is / really? Is it actually a directory? If so how do I check its permissions?I just did a chmod 755 / and it worked. What did that command do if / isn't a directory?

slackd · 11-05-2009, 01:30 AM

Good, will remember that solution.

only "/" means mount point for root partition.

black hole sun · 11-05-2009, 01:35 AM

Quote:

Originally Posted by black hole sun

I fixed it; googling led me to this:
http://www.linuxfromscratch.org/pipe...ly/016455.html

My / had the wrong permissions.
But I have a question -

What is / really? Is it actually a directory? If so how do I check its permissions?I just did a chmod 755 / and it worked. What did that command do if / isn't a directory?

Ahh. ls -la / reveals the permissions of / - the "." (dot).

Excellent, I learned something tonight.

Thanks for your help slackd.

slackd · 11-05-2009, 01:37 AM

yea, man..i learned that permission for / thing, pretty weird stuff, i must add.

disturbed1 · 11-05-2009, 01:40 AM

ls -la /
total 4576
drwxr-xr-x 20 root root 20480 2009-11-04 21:50 .
drwxr-xr-x 20 root root 20480 2009-11-04 21:50 ..

You forgot to post the . and .. perms

/ is a directory that holds bin/ boot/ dev/ etc/ ....

/home/user is 3 nested directories
/
/home
/home/user

What ever happened might have chmod 660 on / or some other perm change.