General :: Changing File Permissions Works As Root But Not As Sudo

Nov 22, 2010

I have a really strange problem. I have a few files in a large directory that I want to make readable by everyone. So I try this:

sudo find readme* -not -perm -o+r -exec chmod +r {} ;

and get this:

sudo: unable to execute /usr/bin/find: Success

I don't know why it says Success, because the permissions were not changed. I verified by typing this:

find readme* -not -perm -o+r -exec ls -l {} ;

and get something like

-rw------- 1 root root 536871076 Nov 22 14:06 readme_20101122200429
-rw------- 1 root root 536871892 Nov 22 14:08 readme_20101122200642
-rw------- 1 root root 293458128 Nov 22 14:10 readme_20101122200859

as a last resort, I tried:

sudo chmod +r *

and got:

sudo: unable to execute /bin/chmod: Success

and again Success really means fail. So, I gave up and logged in as root and tried:

find readme* -not -perm -o+r -exec chmod +r {} ;

This time it worked. Why?

EDIT: /etc/sudoers looks like:

## Allow root to run any commands anywhere
root ALL=(ALL) ALL
##Me
user1 ALL=(ALL) ALL

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General :: CentOS / Sudo Doesn't Accept Root Password But Logging In As Root Works

Apr 9, 2010

I was trying to edit a file requiring root permissions, so I used sudo. I typed the root password and it failed. This happened three times, and the process was ended. I then logged in as root (su) and was able to navigate to the file and make changes as root. Am I missing something? How would I edit the sudoers file such that this password would work? Or is there another way to log in to the sudo group to make these changes? How do I set sudo passwords?

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May 19, 2011

I'm running rhel6 64bit. Accidentally I ran % chmod -R 777 /etc and after that I have a problem to do 'su' or 'sudo'. When I did sudo it complained that /etc/sudoers has 777 while it should be 0440. I changed that and also restored right permission for:

-rw-r--r-- 1 root root 1966 May 19 13:41 /etc/passwd
-r-------- 1 root root 1161 May 19 13:42 /etc/shadow
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Anyway it failed to 'su'. Then I restored back permissions on files in /etc/security and /etc/sysconfig. Still can't do 'su'. Note: I could login from console as root but can't 'su' or 'sudo'. when I do 'su' it gives error: Password: su: incorrect password

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Aug 10, 2011

Accidentally I changed the ownership of all the directories under / to my own instead of root:root. Now I am unable to use sudo and many bad things are happening. Is there a way to revert the changes or change the permissions again to root:root or make sudo work ?

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General :: Changing File Permissions While Doing Ftp?

Sep 17, 2009

I am trying to automate ftp to transfer files from windows to Linux server automatically and my script looks like this .

@echo off
SET CUSTOM=/apps12i/oracle/KIRAN/apps/apps_st/appl/custom/12.0.0/reports/US
echo user oracle> ftpcmd.dat

[code]....

Any files we transfer through ftp from windows , their default permissions to be set 755 automatically . We are using Red Hat Enterprise Linux AS release 4 (Nahant Update 7) .

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Jan 4, 2010

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Oct 16, 2010

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Feb 12, 2011

How to call Nautilus file browser with root permissions? "sudo nautilus" does not work. Under Ubuntu there is a command:

"gksu nautilus"

but this does not work in CentOS either.

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General :: Vim - Avoid Changing A File's Linux Permissions When Saving Over A Samba Connection?

May 28, 2011

I have an Ubuntu development server and a Windows 7 workstation. I use Windows Gvim to edit files on the linux server, over a samba connection.Saving files from Windows change the Linux permissions in weird way depending on the Windows app I'm using and also depending on whether there's a file extension or not.Here are some testsNo extension; Notepad2: 644 to 764

matt@mattserver ~ % ls -l testfile
-rw-r--r-- 1 matt matt 0 2011-05-28 07:09 testfile
--- Save from Windows Notepad2 over network ---

[code]....

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OpenSUSE Hardware :: Changing Permissions From Root To User

Jun 6, 2010

I recently got a new external drive and backed all my files up on the new external: movies, music, docs, etc. Now all my files have permission rights to the root only. I was able to change this by open up nautilis from a terminal in root and change the permission on the whole drive to my current user so I can access the files, copy & delete the files. I wanted to change some music file information in Kynamo this morning and was not able to since all the individual files still belong to the root. How can I change this permission issue without having to change each individual file?

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Jul 9, 2010

When I run '# sudo touch newfile' my expectation was that the file would be owned by me, not by root, as my understanding of sudo is that it is giving me, the user, root priviledges but does not actually switch the user.Do I have a fundamental misunderstanding of what sudo is about?

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General :: Root (sudo) Can't Write To File It Created?

Mar 9, 2011

Debugging some of my scripts after upgrading from Debian Lenny to Ubuntu 10.04. In so doing, I tripped over this "problem," the solution to which may give me a clue to others.

On a bash shell command line I created a file thusly:

sudo touch zero_file

and it lists as expected with default permissions 0644:

-rw-r--r-- 1 root root 0 2011-03-09 11:18 zero_file

But then this command fails

sudo echo abcdef >>zero_file
-bash: zero_file: Permission denied

I can place the command (minus the "sudo") in a script & run it under the auspices of sudo & it works. Am I missing something re the stdin redirection when using sudo?

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General :: RW Permissions On External HDD - Chmod: Changing Permissions Of `whatever': Read-only Filesystem

Mar 15, 2010

I have a problem with my external hdd, I mounted it manually and in the mount table it says ive got rw permissions. But when i try to change permissions it says:

chmod: changing permissions of `whatever': read-only filesystem.

This is my mount table:

[root@localhost ExtHDD]# mount
/dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw)
none on /proc type proc (rw)
none on /sys type sysfs (rw)

[code]....

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Oct 11, 2010

I created a folder structure as root and now need to transfer ownership to an ordinary user.

This question is linked to this one - [URL]

I have a folder /srv/app-share that needs to be visible/writeable to user1

I tried (as root):

root@server [/]# chown -R user1:user1 /srv/

But that did not work.

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General :: Sudo Cd /root Gives Sudo - Cd - Command Not Found

Jan 6, 2011

Kernel 2.6.21.5, Slackware 12.0

Code:

Code:

On the other hand

Code:

So, I do not understand why the notification "sudo: cd: command not found", considering cd is a bash built-in command.

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Jan 25, 2010

I use a USB drive to store most of my personal and work files, and I use it both at home and at work (two different machines, both running Ubuntu). The drive is encrypted, and is accessed using TrueCrypt (the entire drive is encrypted as a device rather than an encrypted file on the device). The TrueCrypt device is formatted as ext3/ext4.

I have a problem with certain file permissions being changed to read-only (rw-r--r--) after mounting the drive. This happens after I have used it on one computer, and then I mount it on the other. Even though I have been setting write permissions to all (chmod -R a+rw *) to get around this problem, when I mount on the other machine the write access is gone. I don't want to keep manually changing permissions; I would like the file permissions to stay as I set them.I'm using the same version of TrueCrypt at work and at home. I'm running Ubuntu 9.04 at work, and 9.10 at home.I do have different usernames on these computers, and I suspect that is the problem (but don't see why this would change file permissions for all users).

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Ubuntu :: Changing File And Ownership Permissions?

Jan 1, 2011

I installed Ubuntu from the alternate cd a few days ago to save space and resources on a very old laptop. (install command line, then add what I wanted) But I have struck an interesting problem with file permissions. Various programs like synaptic, leafpad, pcman, Banshee, all require I enter the root password to execute them (or sudo command from terminal). I want to change synaptic from root ownership to sudo and leafpad etc to execute without using the sudo command in terminal. I could get comments on the commands before I execute them in terminal and if I am introducing a security problem, as I am still learning bash. $ sudo chown sudo:sudo synaptic

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Apr 8, 2011

I have two computers (one at work, one laptop) that I use daily. Both are running Ubuntu 10.04. I frequently use a usb stick to transfer files from one to the other. Somehow, every time I do this, all files get turned into executables (as if I did a chmod a+x on them...)

This happens every time I use the usb stick. I've reformatted the stick, but still this problem persists... anyone have any ideas on what is going on? It is really getting annoying to have to zip up folders so this doesn't happen...

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Jul 12, 2010

Is there a way to have a directory automatically change the permissions of a file that is written to it? I have a program which saves files to a directory, and gives those files read-only permissions to members in the group. This is a problem, because other users of my computer need to be able to edit these files. The directory itself has rw permissions for group members.

I guess what I am looking for is a way for the directory permissions to "override" the permissions the program is trying to save the files as. For example, if the directory has "rw" permissions for the group, then any file saved to it will automatically get the same permissions, regardless of what the program writing the file is trying to do.

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Jul 11, 2011

I'm very new to Linux, i'm running Ubuntu and i'm trying to install a program. In the instructions it says "Check that you ARE NOT root, never run similar tools as root! just change file permissions". How do i check if i'm root or what am I supposed to do here?

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Aug 11, 2010

How do I change folder permissions without changing the permissions of the files within the folder?

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Jul 8, 2010

I've got a problem in doing sudo working for mounting things (e.g. usb pen or optic discs). Details:The OS: Slackware 13.0The response to sudo -l command:

Code:
User user1 may run the following commands on this host:
root) /sbin/shutdown -h now, /sbin/shutdown -r now

[code]...

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OpenSUSE :: Can't Change File Permissions As Root

Sep 25, 2010

I just wanted to set some file permissions right. As root:

Code:
# chown -R kikinovak:users /home/kikinovak/Documents

But all I get is a series of "Operation not permitted" errors. What's going on here? I tried this:

Code:
# find /home/kikinovak/Documents -type d -exec chmod 0755 {} ;

... with the same strange errors.

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Debian :: Use File Manager Actions With Root Permissions?

Jul 30, 2011

If I use the GUI File Manager I ofter get stuck because I need root permissions to write or delete some file or directory. I realize I can drop down to Terminal and do either a sudo or change the permissions of a particular file, but these are several extra steps. Is there a way I can perform root actions on files using File Manager/Browser? Or is there an alternative file manager program I can explore that is more flexible? I am currently using Debian 6.01a installed from the Live CD, Nautilus 2.30.1.

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Ubuntu :: File Permissions / Ownership - Even Root Cannot Change

Aug 30, 2010

I have been VERY lucky and managed to restore from a formatted ext3 /home/ partition. I used testdisk to reset the original partition which had had nothing done to it since formatting(!). However some of the file permissions are a altered and I cannot change them. I have tried "su chmod" and even temporarily enabled the root account itself and tried to alter the ownership/permissions from root 'proper' without it helping.

Here is an example of the output of ls -l
drwxr-xr-x 2 martyn martyn 4096 (date) (time) sponsors
?-----S--T 63231 92820383 44090688 4286824785 (date) (time) order.xls

The first line looks like a normally formed output and indeed is readable. The second line looks corrupted and I don't have a clue how I can reclaim this - or even if it is possible. Should I count my blessings most of my files are intact and leave those be?

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Ubuntu :: Chmod File Permissions Between User And Root ?

Jan 26, 2011

I want to have two kind of users in a work machine having ubuntu 10.04,

1) He is the admin, have sudo privilages and install, do all types of work, his username is abhilash

2) A user who is normally a IT administrator, who can just install or remove softwares, but cannot access files of abhilash.

I'm trying to do this and my head is going blank, The problem where i'm stuck is, if IT admin can install softwares, then he can become sudo as sudo su, then he can view my files

So here is a small test i did, first with abhilash.

Code:

Now others and group don't have any permissions! But when IT Administrator becomes root, he can see this file

Code:

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Jan 15, 2010

I installed Sun's virtual box 3.1 under Ubuntu 9.04. It worked flawlessly. I upgraded to to 9.10 and know I get a kernel error. rc=-1908 Now I cannot get Windows to load.

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Apr 6, 2010

I run a small site and today I've discovered that my site is down. I found that cPanel has flagged the account suspended even though I haven't got any quotas on the account. I don't know what went wrong. I've tried to unsuspend the account in WHM but a certain part of the function failed.

Quote:

safe_userchgid: chown: /home/crocbits/public_html: Operation not permitted at /scripts/cPScript/SafetyBits.pm line 93.

After searching the internet someone mentioned that the problem might lie in the permissions of the public_html folder. I had a look at the permissions and the folder had no permissions d----- When I try to chmod the folder I get this error:

Quote:

chmod: changing permissions of `public_html': Operation not permitted

I have no idea what to do next. All the files in the directory are locked too. I tried to move them but this command isn't allowed either. I ran these commands under the 'root' user in SSH.

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Jun 23, 2010

I want to copy a file into my Root folder but I cant.what should I do?

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Jul 9, 2010

When I run sudo as a normal unprivileged user, it asks for my password, not the root password. That's often convenient, but it reduces the amount of information someone would have to have in order to run commands as root. So how can I make sudo ask for the root password instead of the invoking user's password? I know it'd be done with a line in /etc/sudoers, but I can never seem to properly parse the BNF grammar in the man page to figure out exactly what to write.

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