I am running a Debian 8 Jessie email server with postfix and dovecot. I wanted to change from self signed certificates to certificates from Let’s Encrypt. It was easy to do and I wish had not waited so long to change. This blog post, https://www.shivering-isles.com/lets-encrypt-free-trusted-certificates-for-postfix-and-dovecot/ explained it perfectly for me, so there is no need for me to document the commands.
When I upgraded from owncloud 9 to Nextcloud 11, my web interface was broken and I could not login to Nextcloud with the web interface. I was able to sync files to the server. I then upgraded to Nextcloud 12 through the command line interface. I still could not login to the web interface. The cause of the problem was that I moved the location of the webserver files from /var/www/owncloud to /var/www/nextcloud. I made the appropriate changes to my apache “sites-enabled” configuration file to redirect to the new location at /var/www/nextcloud. I was recieving “Internal Server” errors and the web interface was broken and unusable. I fixed the problem by following this thread https://help.nextcloud.com/t/solved-nc12-internal-server-error-after-login/13256 on deleting the data the in the database table oc_filecache. My steps were to:
- stop the apache2 webserver
- delete everything in “oc_filecache”
- restart the webserver
I used phpmyadmin to remove the contents from “oc_filecache”. I think “oc_filecache” contained information pointing to the old location of my files in the owncloud directory instead of the new nextcloud directory. Below are the steps to delete the information in “oc_filecache”.
- Login to phpmyadmin.
- Select your “nextcloud” database. Your database may have a different name that “nextcloud”
- Select the table “oc_filecache” listed on the far left of the page
- Select “Operations” from the tab at the top of the page.
- Select “Empty the table (TRUNCATE)”
- Select “Ok” to confirm you will be deleting the data in “oc_filecache”.
I tried to order checks from https://www.walmartchecks.com/ twice and never received my order. I called customer service and was told you have order online with internet explorer and firefox was not compatible. Here is the feedback I left them.
“Poor Service. I have tried twice to order checks online and the order looks like it goes through, but then I never received my checks. I called customer service and was told I have to use internet explorer for this website. This is not mentioned any where on the website. What a waste of my time. I use firefox web browser. How about designing your website to support industry standards for web browsing instead of programming for Internet explorer which is not following w3c standards.”
Here is there Feedback:
Dear Valued Customer,
Thank you for contacting Walmart Check Printing.
I’m sorry that the site is not to your liking. We are constantly working to improve our site, but at this time, Internet Explorer is still our main platform for the site. That being said you always have the choice to place the order through a live representative at no extra cost.
Please let us know if we may be of further assistance. We appreciate your business!
e-Servicing Team, Chris
Order Number: 40-
Thank You For Choosing Walmart Check Printing!
I ended up ordering checks from http://www.costcochecks.com/home and their site works with firefox. Their prices are good also.
I use rsync on gnome-ubuntu 15.10 to back up my data to my server running Debian 8. This creates incremental backups similar to Apples Time Machine. The backup runs every 2 hours so this creates more backups than needed at the expense of hard drive space. I used to manually delete the files from the server and would try to save a monthly backup, 8 weekly backups, 30 daily backups, and 2 weeks of every 2 hour backups. This was a time consuming process of manually selecting the files and thus I was not consistent about removing the extra backups. My backup scripts are written in python and I was going to write a script that would delete old backups that were not needed any more. Even better than writing your own script is finding one that has already been written such as https://rotate-backups.readthedocs.org/en/latest/#rotate-backups-simple-command-line-interface-for-backup-rotation. This script will automatically delete your old backups and you can configure it for many backups you want to keep.
This script is well documented and easy to use. I give it my highest recommendation.
I had a need to rename a file with the current date after running a backup script. This was done on Debian 8 Linux. The backup script would make a file name called “/mnt/backup.chadchenault.com/backup/server.cc.com.webmin/webmin.tar.gz“. I like my backup files with year-month-day at the front of the filename for easy sorting by date. My format is 2016-0422 for the date of April 04, 2016. I am using the date command to insert the current date and this is command that runs automatically after the backup command is run.
mv /mnt/backup.chadchenault.com/backup/server.cc.com.webmin/webmin.tar.gz /mnt/backup.chadchenault.com/backup/server.cc.com.webmin/$(date “+%Y-%m%d.webmin.tar.gz”)
This results in a new filename of “/mnt/backup.chadchenault.com/backup/server.cc.com.webmin/2016-0422.webmin.tar.gz”
Here are an example of testing the date command from the command line.
Create a file “delete.txt”
Copy the file to a new name with current Year-MonthDay.delete.txt format
cp -v delete.txt /root/$(date “+%Y-%m%d.delete.txt”)
The output of the command on 2016-0422 was:
‘delete.txt’ -> ‘/root/2016-0422.delete.txt’
The command was run successfully.
Playback of video was choppy and CPU utilization would reach 100% without hardware acceleration. I am using default radeon open source video drivers. I installed VDPAU drivers with
sudo apt-get install mesa-vdpau-drivers
I updated the Evolution Email Client from 3.12 to 3.16 on Ubuntu Gnome 15.04. Version 3.16 has an archive feature I wanted to use that is not found on 3.12. I followed this blog, http://linuxpitstop.com/how-to-upgrade-evolution-email-client-to-3-16-on-ubuntu-15-04/#comment-3070, that had the installation instructions.
This contains instructions on how to add new applications to your owncloud 8.1 server. I will give an example of adding Mozilla Sync 1.4 application. I am downloading the application using the command line. The server is Linux Ubuntu 14.04.02.
- Go to https://apps.owncloud.com/ and find the application you want to add. Find Mozilla Sync 1.4 application and go to it’s page.
- Go to it’s git page by clicking “Link”. It is located at the top of the page at Version Control: Link
- From the git page, copy the git link “HTTPS clone URL”. The link is https://github.com/owncloud/mozilla_sync.git
- From the terminal go to your apps directory in owncload (/var/www/cc.com/owncloud/apps).
- Download the application with:
sudo git clone https://github.com/owncloud/mozilla_sync.git
- View the directory and make sure the application is owned by your web server user “www-data”
- Change the ownership of the directory to www-data:www-data (user:group)
sudo chown www-data:www-data -R mozilla_sync/
- From owncloud menu, select Apps/Not enabled. Find the application Mozilla Sync 1.4 and select the “enable” button to activate the application.