32
votes
How can I permanently fix /dev/vchiq permission errors?
I was able to solve a similar problem by adding myself to the video group (I was not using the default user). Maybe this can help.
The command is:
sudo usermod -a -G video $(whoami)
You will need ...
- 421
27
votes
How to start Motion in daemon mode on RPi running Raspbian Jessie
To enable motion to run as a daemon on startup do the following:
Edit /etc/default/motion
and change start_motion_daemon=no to start_motion_daemon=yes
Next enable motion by entering the following ...
- 34.6k
18
votes
Accepted
Sudo permissions disaster
You didn't do anything wrong during setup. By default, user "pi" can issue sudo commands with no password; that's the way Raspbian is released. If you haven't done very much other customizing, just ...
- 1,037
8
votes
Set permission for /dev/ttyAMA0 on boot
The following will ensure read access, but changes group from tty to dialout.
sudo systemctl mask serial-gett[email protected]
And on reboot we have:
# ls -l /dev/ttyAMA0
crw-rw---- 1 root dialout ...
- 575
6
votes
Accepted
What is the purpose of group "staff"?
According to the Debian Wiki:
staff: Allows users to add local modifications to the system (/usr/local) without needing root privileges (note that executables in /usr/local/bin are in the PATH ...
- 4,166
6
votes
Accepted
Raspberry Pi Desktop, Guest Additions: Access denied under root
8. of the preferred answer here. Not much of an explanation, yet it certainly works.
# sh /media/cdrom0/VBoxLinuxAdditions.run
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5
votes
What is the purpose of group "staff"?
This isn't peculiar to Raspbian or even GNU/Linux; evidently it's used on OSX too, although perhaps not the same way. Both operating systems are a form of unix -- I found that OSX question by ...
- 58.5k
5
votes
Issue with multi-user NAS setup
This seems to be a classical unix rights problem. Let's have a look on it. To avoid confusion I set user of /media/NAS to root and then check where is the problem:
pi@raspberry ~$ sudo chown root /...
- 41.9k
5
votes
Accepted
Permission denied to access `/media/pi` folder
This happens because you have mount helpers which mount the storage devices with the identity of the user holding the current session on your machine. If you have a GUI and log in as pi, that's the ...
- 27.7k
4
votes
How to allow I2C access for non-root users?
I think the bcm2835 C library is unique in being the only one which drives the I2C peripheral directly rather than using the Linux I2C driver.
This access was needed when the Pi first came out as ...
- 70.5k
4
votes
Accepted
Trouble with changing owner group of a windows shared folder from root to pi
You need to use the uid/gid options when mounting the share you can't do it after mounting, because you can't actually change the owenership (that doesn't make sense to a windows share)
sudo mount....
- 2,383
4
votes
What's wrong with this wpa_suppplicant.conf file?
OK...I realized the issue...As I was just testing the move from /boot/ to /etc/wpa_supplicant.I added a dummy new network but the password was less than 8 characters and so that made wpa_supplicant to ...
4
votes
Accepted
Why won't my systemd execute?
I don't know what you want to achieve but as you can read in man systemd:
systemd is a system and service manager for Linux operating systems. When run as first process on boot (as PID 1), it acts ...
- 41.9k
4
votes
Accepted
How to fix the systemd file permissions?
You'll need to add a working directory to your unit file as the Pi user won't have write access to put cmdfile.txt into the root of the volume (or whereever systemd roots itself).
in your Unit file ...
- 988
4
votes
GPiO setup works from shell, but not from script or C code
It takes a fraction of a second for the kernel to export the GPIO. Adding a short delay lets the action complete before the next command is run.
- 70.5k
4
votes
Accepted
Error copying files permission denied | using the sudo command
I have solved my problem with help from @Peter Paul Kiefer in the last answer.
I was running this command:
sudo curl https://cli.pipedream.com/install | sh
But this was only running curl as sudo i ...
- 71
3
votes
How to start Motion in daemon mode on RPi running Raspbian Jessie
Confirmed for stretch (v9) as well.
you can also use
$ ps -ef | grep motion
to see if motion is running
- 91
3
votes
Cannot mkdir unless sudo is used
For those with similar problem, make sure to run raspberry pi config tool. In there you will find a menu that allows you to expand your partition to fill 100℅ of the available space. Otherwise, you ...
- 175
3
votes
How to find out if you are the Administrator
By default, if you're not root, you're not "administrator". You can enter whoami at the command prompt to see who you're logged in as. If your user is a member of the sudo group (assuming you're ...
- 3,988
3
votes
Accepted
How to find out if you are the Administrator
POSIX systems such as GNU/Linux use root filesystems where each file has mandatory permissions set on it.
The superuser (aka. root) on such a system can access anything. Raspbian exploits the sudo ...
- 58.5k
3
votes
Accepted
i2c Permament ownership setting
On Raspbian members of group i2c have access to the I2C devices.
If you are using Raspbian you could make www-data a member of the i2c group.
sudo adduser www-data i2c
- 70.5k
3
votes
Accepted
Why is /boot/config.txt executable?
The files in the /boot directory are from the first partition of the SD card that's been mounted there during the boot process. Because the first partition is formatted as a FAT filesystem the files ...
- 1,494
3
votes
Error reading lock file /etc/.rc.local.swp: Not enough data read
.*.swp files are created by the vi editor to log changes so that the undo command can work.
They are created with the same permissions as the file they are logging in the same directory. Because the ...
- 5,261
3
votes
Permission denied error when using apt and apt-get as root on raspbian
I don't know what repositories do you have addressed in your /etc/apt/sources.list. But it seems you have a Raspbian and a Debian repository addressed. This is not a good idea except do you really ...
- 41.9k
3
votes
Permission denied using Serial
Why are you calling
os.system("sudo systemctl stop [email protected]")
os.system("sudo systemctl stop [email protected]")
These are the same interface, and if you aren't using ...
- 58.6k
3
votes
Sudo permissions disaster
The Answer by Bob Brown is correct but if all you want to do is remove password less sudo just delete the 010_pi-nopasswd file.
This can be done on a Linux computer.
You could also log in to a root ...
- 58.6k
3
votes
Accepted
how to enable pcmanfm to copy paste in directories that say "permission denied"
Close all file manager windows and start it again from command line:
sudo pcmanfm
This will let you do anything root could do. Make sure you don't accidentally drang-and-drop /usr into /lib or ...
- 27.7k
3
votes
Accepted
I accidentally removed read, write and execute permissions from the root ("/") directory
This is an issue that cannot be corrected out of the running system. I would advise shutting down the Pi(1), removing the SD card and then attaching it via card-reader to a different computer running ...
- 254
2
votes
Mount NFS Folder share on RPi from a synology NAS
Before to mount the nfs,
you must start rpc
sudo /etc/init.d/rpcbind start
- 121
2
votes
How can I permanently fix /dev/vchiq permission errors?
If you are running raspistill from a php script accessed via a browser then you need to enter: sudo usermod -a -G video www-data
to give Apache the necessary permissions.
- 21
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