RHEL8.3 OS is being used on server, Yesterday i have accidently executed command chmod 644 /* from /usr/share/fonts directory after command execution i am not able to access server with ssh or on putty.
Admin is trying to connect to server with root user but he is getting error /bin/bash: Permission Denied.
Please suggest how to restored permissions or resolve issue.
Refer to here, 644 means you can't even execute the file, with or without root.
Permissions of 644 mean that the owner of the file has read and write access, while the group members and other users on the system only have read access.
Could you try sudo chmod 755 /* or without root chmod 755 /*?
Also, you may try this.
If nothing works, reinstalling your system will be the only choice left.
Related
I have set up an Ubuntu server on Digital Ocean. Following are the config details:
Ubuntu version : Ubuntu 16.04.2 LTS
Apache version : Apache/2.4.18 (Ubuntu)
I am trying to run a php script through browser which will need to create a file in the directory . I keep getting the following permission denied message in the /var/log/apache2/error.log file fopen(<folder_to_write>): failed to open stream: Permission denied in test_write.php
I discovered that the user www-data (apache2 user) is having a permission issue. I changed the owner of the folder as follows :
chown -R www-data:www-data folder_to_write
and then
chmod 2775 folder_to_write
This did not work.
Finally, I tried the last option. I changed the directory permission to sudo chmod -R 777 folder_to_write hoping to get some lead. However, despite giving this full access permission, I got the permission denied message.
Has anyone experienced any such issue earlier? Not sure what I am doing wrong. I tried the same steps with another user and that seems to be working fine.
I appreciate your help. Thank you so much.
fopen(): failed to open stream:
It seems not able to find directory folder_to_write , Please check your absolute directory path if that's configured right for writing to a file.
I am very new to this stuff and do not have much experience with linux - any help would be highly appreciated.
I am unable to login as root - I seem to be getting the following error when I sudo su root:
sudo: effective uid is not 0, is sudo installed setuid root?
It seems the permissions on the sudo executable has somehow been changed to full permissions, ie. 777
How can I change the permissions on this as we do not know the root password?
Is there some sort of default root password or any other way to change these permissions?
I created a shared folder using samba in ubuntu to enable windows machines can access it with the following command:
$ sudo net usershare add documents /home/developer/documents "Developer documents" everyone:F guest_ok=y
I give 777 permissions to the folder:
$ sudo chmod 0777 /home/developer/documents
And then I check what I've done
$ sudo net usershare info --long
When I want to see if the folder is visible from all windows machine, you can see. However, you cann't access that folder and get error of: "Permission Denied"
The message in: /var/log/samba/log.ip-domain is:
process_usershare_file: stat of /var/lib/samba/usershares/backuparsac failed. Permission denied
Then, I try to add some rules to my smb.conf
[documents]
comment = Documents for Developers
path = /home/developer/documents
browseable = yes
writable = yes
read only = yes
guest ok = yes
directory mask = 0777
but the error of Permission denied keeps coming. Is there anything else I need to do? I need this folder can be accessed by all windows machines.
NOTE: I use Ubuntu 14.04
The cause is that Samba does not synchronize its users with the system.
This solved the issue in my case, on Kubuntu 14.10:
sudo apt-get install libpam-smbpass
sudo service samba restart
If you don't want to synchronize users with PAM, simply add a user to Samba's password database:
sudo smbpasswd -a <user>
After that, the user will be able to open shared folders on the Samba machine.
Your configuration file seems to be fine.
I reckon there might be a permission issue in your parent folder.
I suggest you check /home and /home/developer both have 755 rather than 750 permission.
Then check sudo -u nobody ls /home/developer/documents.
If ls is successful, the samba is likely to work as you expected as well
I am trying to use "Rsync" to copy my spark directory to all the slave machines by this command:
rsync -avL --progress /path/to/spark-0.9.0-incubating ubuntu#<Public_ip_of_slave>:/usr/local`
I am following the instructions on this site:
http://docs.sigmoidanalytics.com/index.php/Setup_hadoop_2.0.0-cdh4.2.0_and_spark_0.9.0_on_ubuntu_aws_cluster"
but I am facing an error which is permission denied to make the folders in the destination.
Can anyone help me?
The ubuntu user (which you are using for scp) does not have the appropriate directory permissions on /usr/local at the remote server.
Misconfiguration can result in security issues so changing the directory permission of /usr/local is not recommended. If you wish to do so run:
ssh ubuntu#remote-server 'sudo chown root:ubuntu /usr/local'
where remote-server is the hostname or IP of the remote server and assuming that ubuntu is an administrator. You may also allow all others to write to the directory:
ssh ubuntu#remote-server 'sudo chmod o+w /usr/local'
but this is more dangerous than the previous option.
Alternatively, you may copy it into your home directory first then issue a sudo command to move the files into /usr/local:
rsync -avL --progress /path/to/spark-0.9.0-incubating ubuntu#remote-server:~
ssh ubuntu#remote-server 'sudo mv ~/spark-0.9.0-incubating /usr/local'
~ will be expanded to the home directory of the user, which in this case is likely to be /home/ubuntu/.
Do remember to change the permissions of /usr/local/spark-0.9.0-incubating as appropriate to allow access to authorized users using the chmod command.
I'm running into a permissions problem with Cherokee+uWSGI on Ubuntu Server 13.10 intended for a Django production environment. When I start uWSGI manually as root user prior to launching cherokee, everything goes smooth:
sudo uwsgi --ini /home/instytut21/instytut21l/instytut21/uwsgi.ini
But when I try to access the site through the server (running as www-data) without that, I keep getting a 503 Service Unavailable response and the following message in the logs:
sudo cat /var/log/cherokee/instytut21.error.log
realpath() of /home/instytut21/instytut21.pl/instytut21/uwsgi.ini failed:
[core/utils.c line 3574]
I've spent a good while trying to figure out what causes the problem. I've tried giving ownership to $USER:www-data and www-data:www-data with all kinds of file permissions ranging from 600 to 777.
I don't want to run the server as root for security reasons. How can I make the ini file accessible to cherokee?
I finally found a solution to a similar problem at www-data permissions? . I slightly modified it and solved my problem by executing the following commands.
Own the whole directory by me and group www-data:
sudo chown -R $USER:www-data /home/instytut21/instytut21.pl/
Grant all permissions to the group:
sudo chmod -R g+rwx /home/instytut21/instytut21.pl/
Ensure all uploaded filed get the same permissions:
sudo chmod -R g+s /home/instytut21/instytut21.pl/