I faced following error while installing devstack on by ubuntu 14.04.3 virtual machine :
i would like to know how to solve the mysql error i faced
./unstack.sh
./clean.sh
sudo apt-get purge mysql-server
then check if there is any mysql process is running ps -ef | grep mysql, if there is any unexpected mysql process, kill it.
Finally
./stack.sh
Related
After upgrading my ubuntu from 21.04 to 22.04.
I noticed after running
sudo apt update
,it returns:
I followed the instruction here to install mariadb on WSL after following the steps. and I run this
sudo service mysql start
I got
mysql: unrecognized service
Any idea how to solve this?
It's just a simple problem as you see but it takes me 24 hours to diagnose the problem.
Solution:
I uninstall mariadb with this command
sudo apt-get remove --auto-remove mariadb-server
and install sudo apt install mysql-server instead but it leads to a more problems
Successfully install mysql but can't start
dpkg: error processing package mysql-server (--configure):
dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
Errors were encountered while processing:
mysql-server-5.7
mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)
so by removing mariadb's deb sources and purging mysql-common and then reinstalling it.
do:
sudo apt edit-sources
and look for anything containing mariadb like: deb [arch=amd64,arm64,ppc64el] http://ftp.nluug.nl/db/mariadb/repo/10.3/ubuntu bionic main
comment it out by putting a # in front of it. then run
sudo apt update
sudo apt purge mysql-common
sudo apt install mysql-common
after that you can installed mysql-server properly via sudo apt install mysql-server, then do:
sudo apt purge mysql-server mysql-server-5.7
sudo apt purge mysql-server mysql-client mysql-common mysql-server-core-5.7 mysql-client-core-5.7
sudo rm -rfv /etc/mysql /var/lib/mysql
sudo apt autoremove
sudo apt autoclean
Finally:
sudo apt update
sudo apt install mysql-server mysql-client --fix-broken --fix-missing
References:
https://askubuntu.com/questions/980314/cannot-install-mysql-server-in-ubuntu16-0-4
https://askubuntu.com/questions/763534/cannot-reinstall-mysql-server-after-its-purge
Which Linux distribution are you using on your WSL?
First, try the following:
systemctl {start|stop|restart|status} mysql
OR
service mysql {start|stop|restart|status}
to manage the MySQL service.
The reasons can be the following:
Wrong service name:
On some Linux distributions, the service is named as mysqld instead of mysql.
To check: Run chkconfig --list on your WSL and identify the correct service name.
File permission issues:
Please ensure that the files in /var/lib/mysql have 770 permissions and ownership set to mysql user.
To fix:
chmod -R 770 /var/lib/mysql
chgrp -R mysql /var/lib/mysql
In addition to that, ensure that the /etc/rc.d/init.d/mysqld script has executable permissions to modify mysqld.
To fix:
chmod 755 /etc/rc.d/init.d/mysqld
Missing/Corrupted MySQL server package:
Reinstall MySQL!
I need to create an AMI with a clean install of R and RStudio Server. I have tried this on Amazon Linux 2 AMI (HVM), Amazon Linux AMI 2018.03.0 (HVM), and Ubuntu Server 18.04 LTS (HVM) but none of them work. I do not get any errors (that I notice) in my installs but when I try to access RStudio Server via http://ec2-XX-XX-XX-XX.compute-1.amazonaws.com:8787 there's nothing to connect to. I have even tried opening all ports to all IPs to make sure it wasn't a networking issue.
My Amazon API install scripts are below
Amazon Linux AMI 2018.03.0 (HVM)
sudo yum install -y R
wget https://download2.rstudio.org/server/centos6/x86_64/rstudio-server-rhel-1.2.1335-x86_64.rpm
sudo yum install -y rstudio-server-rhel-1.2.1335-x86_64.rpm
rm rstudio-server-rhel-1.2.1335-x86_64.rpm
Amazon Linux 2 AMI
sudo amazon-linux-extras install -y R3.4
wget https://download2.rstudio.org/server/centos6/x86_64/rstudio-server-rhel-1.2.1335-x86_64.rpm
sudo yum install -y rstudio-server-rhel-1.2.1335-x86_64.rpm
rm rstudio-server-rhel-1.2.1335-x86_64.rpm
I get this as part of the result:
Running transaction
Installing : rstudio-server-1.0.153-1.x86_64 1/1
groupadd: group 'rstudio-server' already exists
rsession: no process found
rstudio-server start/running, process 4990
Verifying : rstudio-server-1.0.153-1.x86_64 1/1
Installed:
rstudio-server.x86_64 0:1.0.153-1
Complete!
I think the issue is the rsession: no process found portion but I can't figure out how to resolve it.
Would anyone know or like to share their note on installing opencpu cloud server on ubuntu 16.04?
I thought it is easy, but we saw many error here and there when following the instructions. I am new to opencpu. And, I don't have much experience on apache and nignx.
Here is the long story:
I created a new and clean ubuntu 16.04 server from microsoft azure vm, and installed opencpu cloud server following:
# Requires Ubuntu 14.04 (Trusty) or 16.04 (Xenial)
sudo add-apt-repository -y ppa:opencpu/opencpu-1.6
sudo apt-get update
sudo apt-get upgrade
# Installs OpenCPU server
sudo apt-get install -y opencpu
The server reported insserv error when running opencpu init script
update-rc.d: error: insserv rejected the script header dpkg
We then did some goolge and fix around, we got apache2 running, but when called:
curl http://localhost/ocpu/info
received 404 error.
FYI, the single user server runs fine.
The solution we found is that opencpu need mod_R to be turned on from apache2:
sudo a2enmod R
You need first to change to dir:
/etc/apache2/mods-available
And, make sure R.load file exists.
After running a2enmod command, should see a link to R.load (R module) in
/etc/apache2/mods-enable
Thank you y g for your question and response .. I had the same problem i try what you have mentioned in your comment but
curl http://localhost/cpu/info
takes along time without no response.
Thank you.
I used opencpu 1.5 works without bugs on ubuntu 16.04
sudo add-apt-repository -y ppa:opencpu/opencpu-1.5
sudo apt-get update
sudo apt-get upgrade
Install R and then install opencpu
sudo apt-get install r-base r-base-dev
sudo apt-get install -y opencpu
Also you should probably install Rstudio for IDE access
sudo apt-get install rstudio-server
To login to R you'll need to make a new user - follow the prompts
sudo adduser myname
Now just to make sure its all working
sudo service opencpu restart
sudo service rstudio-server restart
And try something like to check if its working
curl -L -v localhost/ocpu/library/
which should return a list of packages now installed on Ubuntu like this
Final Screenshot
please help me installing phpmyadmin on ubuntu running with Nginx
Its pretty easy, just execute below command
apt-get install phpmyadmin
to get more info, read Install and configure phpmyadmin