I know dpkg stores the permissions in the databases and I found the following script google which may help. Edit: I actually had a quick look at the script and it looks as if it is missing a bit of magic that goes from PERMS to MODE eg dpkg -c gives for example "-rw-r--r--" but you wantI am at work right now so I am not sure I have the time to do the conversion at this instant but I may come back later if no one else has jumped in to add that bit.
There is a script here which is looks interesting. It is possible to come back from such a messy situationwithout reinstalling the system. Well, more exactly running a fresh new system either from an USB key or in a Virutal Box or so if you have a dual boot system. I ran again the same kind on issue some bug in a script I was writing and solved it, but you need to ask some expert's help.
Be very cautuous! Then I ran the following command my issue was only in a few - critical - directories to copy the permissions on from the running system to the messy one in fact, in my case, I installed an ubuntu system in Virtual Box under fedora and got the permissions there :. Of course, you have to take care here, that the UID and GID are the same on both systems, but for the system related users and groups, this shouldn't be an issue.
An important thing for this is to keep an install disk synchronized with the version you are using, or at least work with the current ubuntu version. Now, I have this commands in a cronjob, running every day could be weeks in order to keep that information. It will make the solution easier next time but, of course, as I have this now, it will never happen again. But if reinstalling is not an option, here's an idea:. Sort the packages by status installed packages at the topselect all the installed packages, right click and select reinstall.
Then apply, that will prompt dpkg to re-extract all the files for those packages. You will lose any local modifications but not config file changes. It may not get everything fixed though. Also, if you are using Ubuntu, you can do a dist upgrade which often fixes lots of errors assuming you aren't already on the latest release.
Server Fault is a question and answer site for system and network administrators. It only takes a minute to sign up. I am trying to configure my Ubuntu I think the newer versions of Openvz Kernel 2.Get Root Permissions via File Manager in Ubuntu 16.04
Sign up to join this community. The best answers are voted up and rise to the top. Permission denied when setting values in sysctl on Ubuntu Asked 6 years, 9 months ago. Active 6 years, 9 months ago. Viewed 1k times. Can anyone please point out what am I doing wrong? Thanks in advance. Jay Bhatt Jay Bhatt 1 1 silver badge 7 7 bronze badges.
Active Oldest Votes. OpenVZ doesn't allow access to kernel parameters from inside the container. Try submitting a support ticket to your VPS provider. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. The Overflow Checkboxland. Tales from documentation: Write for your dumbest user.
How to Fix Docker Permission Denied Error on Ubuntu
Featured on Meta. Feedback post: New moderator reinstatement and appeal process revisions. The new moderator agreement is now live for moderators to accept across the….
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It only takes a minute to sign up. You have to login as root. The output redirection is done by the shell from which the command has been invoked. It gets "permission denied" error.
When opening the file fails the shell doesn't even invoke the command which was supposed to write to the file thanks to PanosRontogiannis for pointing this out. In the test above the whoami tee who. However, when the output redirection fails in the calling shell, "who. You can use a tee command like this:. An approach I haven't seen mentioned here is to simply execute the entire commandline in its own shell. The sudo manpage itself gives an example of this approach:.
Note that this runs the commands in a sub-shell to make the cd and file redirection work. Ubuntu Community Ask! Sign up to join this community. The best answers are voted up and rise to the top. Ask Question. Asked 7 years, 6 months ago. Active 8 months ago. Viewed k times. When using sudo to allow edits to files, I regularly get 'permission denied'. Jack Jack 2, 2 2 gold badges 18 18 silver badges 23 23 bronze badges.
Active Oldest Votes. Andrea Corbellini You can't run echo with sudo? It's using pipe. That is the problem.This detailed troubleshooting article helps you fix the permission denied error with Docker on Ubuntu and other Ubuntu-based Linux distributions.
Recently, I installed Docker on Ubuntu. It was super easy. But when I tried to run a docker command, it threw this error at me:. It happens for basic docker command like ps as well. But running each and every docker command with sudo is super inconvenient.
To run the docker commands without sudo, you can add your user account or the account you are trying to fix this problem for to the docker group.
First, create the docker group using groupadd command. Now that you have the docker group, add your user to this group with the usermod command. Verify that your user has been added to docker group by listing the users of the group. You probably have to log out and log in back again. If you check your groups and docker groups is not listed even after logging out, you may have to restart Ubuntu. To avoid that, you can use the newgrp command liks this:. In some cases, you may need to add additional permissions to some files specially if you have run the docker commands with sudo in the past.
Did it fix the problem for you? If yes, I welcome a quick comment of thanks from you. Home About Us. Docker Troubleshooting. Abhishek Prakash.
Let me show you how to get past this annoying error. Fix 2: Running docker commands without sudo To run the docker commands without sudo, you can add your user account or the account you are trying to fix this problem for to the docker group.
To avoid that, you can use the newgrp command liks this: newgrp docker Now if you try running the docker commands without sudo, it should work just fine. Further troubleshooting In some cases, you may need to add additional permissions to some files specially if you have run the docker commands with sudo in the past.
It should be fine. Never miss a Linux tutorial. Join the newsltter. You might also like.Post a Comment. Yesterday, when I saw the Ubuntu forum in my country, I read that someone asked about an error. The user complained that he could not update the ubuntu through the terminal.
He gets an error like the picture below!. How do you respond as a Ubuntu user who is familiar with this distribution?
Fix /dev/kvm is Not Found and Device Permission Denied Errors on Linux/Ubuntu 20.04/19.04
Maybe you will assume that the problem above is easy and trivial. But it's different from users who are just starting to learn Ubuntu. Believe it or not, the error questions like the picture above are really asked by new Ubuntu users who are members of the forum.
Many responses from members of the group who answered well and did not underestimate the question, even though how to resolve the error above is easy, for those of us who are accustomed to using Ubuntu.
Okay, let's explain for the new Ubuntu users how to solve this problem!. The screenshot above is an error when I haven't added the "sudo" Superuser do command, to the Ubuntu terminal. So, in Ubuntu, when we want to command something on the system that is related to the file system directory on Ubuntu, usually the user will be asked to execute the command as root superuser.
Because the one who has user privileges in that directory is Superuser. And in this case, to update Ubuntu packages through the terminal, there is an error in the terminal due to "Permission Denied". Therefore, when a user wants to update a package, the sudo command must be added, sudo apt update is updated, and requires an authentication password. After the password typed by the user matches, the system will update according to the command.
You can also just type apt update when you want to update ubuntu via the terminal. But to be able to execute it, you need to go into the root with the sudo su command first. Share This:. Labels: StoryUbuntu. No comments:. Newer Post Older Post Home. Subscribe to: Post Comments Atom.
On the site, I also respond to this question that was asked of me. As a Linux user, I imagine running a Linux distribution on an Android device. We know that most Linux distributions are made for desktop c Are you bored with the default ubuntu image viewer?. In the Linux distribution there are many applications for viewing images.
Each linux Appearance of vimix grub theme Are you bored with the default Ubuntu Grub display? If so, then you can replace it with themes provided Image Via Pixabay Distrotest is one site that provides a variety of Linux distributions that can be run directly on the browser.
It's been 10 years I use an old laptop with these old school specifications in my computer activities. Right now, it looks like my lap Sticky notes application is one application that looks trivial but is very useful.
This application is usually used to note something. How To CThis tutorial explains how to make the htdocs folder writeable in the Ubuntu. Learn how to fix the file permission and ownership issue of the htdocs folder. Linux categorize all users in three types; owner, group and others. Based on these types, it allows system administrator to configure the file permission on all objects such as files and folders.
There are three types of the file permission; read, write and execute. What a user can do with an object is depend on the type of permission that he has on that object. Following table lists the actions that a user, based on the type of permission, can take on a file or folder. A user who creates an object is considered as the owner of that object. Reset users are considered as the other users. In Linux, only the user root or the user who has the root privilege can install the software.
When the XAMPP is installed under the root privilege, the user root automatically becomes the owner of all files and folders those are created during the installation. Since the folder htdocs is also created during the installation, it is also owned by the user root. Thus, both owner and group owner of the htdocs folder is the user root. This makes the folder htdocs unwritable for all users except the user root. Login from a regular user account and create a file and a directory in this folder.
This time, open this folder from the GUI console and create a new file or folder in the opened folder. As we can see in above figure, just like command prompt, user is not allowed to create a new file or folder in this folder. To fix this issue, we have two options; grant the write permission to all users or change the ownership of this folder. This command sets the full permission for all users on the htdocs folder and all of its contents.
This permission applies only on the existing files and directories. Any new file or directory that will be created after this command will get the default permission. As we can see in above output, users are now allowed to create the file and folders in the htdocs folder.
Although granting the write permission to all users is the easiest fix of this issue, still it should not be used. This option solves one problem at the cost of several other security related problems. Making this folder world writable means inviting everyone to write and execute scripts from this folder. Any network user, who can access this folder remotely, can not only write and execute a harmful script from this folder, but also modify the existing code.
Unless your system is not connected with network and you are only the user who uses the system you should not use this method.
How to resolve permission denied Linux error
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It only takes a minute to sign up. While trying to communicate between my desktop Ubuntu I am able to login through ssh from fedora to Ubuntu, but not vice-versa. I even performed telnet on both machines via port 22 and both machines are listening, but not through ssh. What to do? Any idea? As you have noted, the Fedora box you are logging in to was not set up to allow password authentication, only public key authentication - this can be seen from the ssh -v result.
Now that you have password authentication enabled, you can install the authorized key with this command on the Ubuntu box:. My issue was that I had multiple public keys and ssh-copy-id defaulted to the wrong one:. Ubuntu Community Ask! Sign up to join this community. The best answers are voted up and rise to the top. How to fix Permission Denied Public key error?
Ask Question. Asked 6 years, 10 months ago. Active 1 year, 11 months ago. Viewed k times. Vivek Singh. Vivek Singh Vivek Singh 1 1 gold badge 2 2 silver badges 9 9 bronze badges. Possible duplicate of git ssh :Permission denied publickey. Active Oldest Votes. So one solution is to add password authentication, as you have done.
David Purdue David Purdue 2, 9 9 silver badges 14 14 bronze badges. Sorry all, it appears to be my mistake.