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Closed 9 years ago.
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I recently changed the permissions around for the /var/www/ directory on my Ubuntu 12.04 machine. Now my user can save to the directory but I get an error whenever I try to run the sudo command stating that my user is not in the sudoers file. I booted up grub to take a look and have tried to run "sudo usermod -G sudo kevin" a few times and get the error cannot lock /etc/passwd/; try again later. Is there any way to re add myself to that group without re-installing Ubuntu?
It sounds like your problem stems from the file system being mounted read-only as it is by default in recovery mode. Try remounting the filesystem in read-write mode using
"mount -o remount,rw /"
Are you sure your system is mounted in read/write mode when you're using GRUB? This can be achieved through the mount -o remount,rw / command.
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Closed last year.
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"/etc/docker/daemon.json"
"/etc/docker/daemon.json" E212: Can't open file for writing
I’m currently trying to set up a Loki server, Promtail, and Grafana as docker images
I installed all the plugins needed however when I tried editing the docker daemon config file with this command
sudo nano /etc/docker/daemon.json
It does not allow me to write due to permissions so I tried using
sudo vi chmod 666 /etc/docker/daemon.json
but this only creates a new file in my directory called chmod
The docker containers are up but I can't see the Loki metrics on my web browser when I try to use localhost:3100/metrics neither can it can be added as a Datasource
Please can you help?
It should be sudo chmod 666 /etc/docker/daemon.json.
What you are doing is running vi against 3 files, chmod, 666, /etc/docker/daemon.json.
The directory /etc/docker must also exist as a directory, and not as a file.
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Closed 1 year ago.
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How do I regain access to my home folder?
I was trying to get shared folders to work in VirtualBox and I changed the user group to vboxsf by invoking
sudo usermod -a -G vboxsf dev
I rebooted then I lost access to /home/dev, the home user folder.
I tried to fix it but it did not work. The changes do not get persisted!!
I own the VM. How do I fix this?
The solution is simple. Just change the ownership of the folder "/home/dev"
you can do this by chown command:
sudo chown -R vboxsf:vboxsf /home/dev
and then your ownership and group will be changed from root to vboxsf
Check if the home directory is existing by doing ls -ltrh /home if you see directory named dev then check it's owner
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Closed 6 years ago.
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I am sorry if this is something obvious but I am new to Linux.
I was trying to set a git bare directory and for this I installed ACL on Ubuntu. Then I ran the following commands:
adduser git
mkdir /repositories
chmod 700 /repositories
setfacl -m defaut:user::rwx /repositories
sudo chown git:git /repositories
Everything was fine until I rebooted the machine. Now I am unable to execute sudo anymore. Everytime I do it as myself I get following message:
[[sudo]] password for Andre:
Sorry, try again
The password I enter is the same I always used, and I don't have any problem to SSH with these account credentials.
Does anyone knows what happened and how to fix it?
I think that the issue was with setfacl. I should have used 'repositories' instead of '/repositories'. In that way I set acl across the root. I ended up reinstalling Linux.
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Closed 4 years ago.
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After a typo in a change to /etc/pam.d/sudo no user can sudo at all. The package cannot be modified as it requires sudo privileges, but all attempts result in rm: cannot remove ‘/etc/pam.d/sudo’: Permission denied and attemps to escalate to sudo result in sudo: PAM authentication error: Module is unknown. The package cannot be removed as it requires sudo. What is there to be done?
My account was part of the sudoers group, was able to pkexec vi /etc/pam.d/sudo and make the appropriate changes to the file as described here
In this situation where root access is required you have 2 options: (1) acquire the root password and fix pam.d/sudo or (2) boot with the install media with init=/bin/bash (or linux init=/bin/bash using LILO).
If you can't get the root password and must rely on the install media, then you will need to boot the install media, at the grub or lilo menu choose Boot Options and set:
init=/bin/bash (if you are using GRUB Boot loader)
linux init=/bin/bash (if you are using LILO Boot Loader)
Then check that the / filesystem is mounted read/write with the mount command. If not rw, then:
mount -o remount,rw /
You can then modify/replace pam.d/sudo. Reboot or telinit. (Note: you will need to modify the commands for systemd)
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Closed 9 years ago.
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I am trying to run a command that needs to write to the / folder. I added myself as user to sudoers file using sudo visudo. Added the following line at the end of file.
yedg ALL=(ALL) NOPASSWD: ALL
The command still fails complaining about permissions. Now this makes me wonder does adding to sudoers file allow me to run as root or does it give me privileges similar to root? Looks like the former. Am I right or did I miss something?
After you are added to sudoers file, you have permission to execute commands as root through sudo command.
Something like this:
sudo apt-get install skype
sudo rm -rf protectedDirectory
Actually sudo means substitute user do.