This must be my second or third attempt at Discourse having given up several times before and I may well find reasons to avoid it again. The Discourse advice of just use Ubuntu or using DigitalOcean doesn't cut it for me. One of the problems I ran... » More
On Linux Mint (Ubuntu) I had installed the Arduino IDE from the repository and that had installed version 1.0.5. Despite setting the permissions on the Arduino USB device, the 'Serial Port' option in the IDE menu was greyed out and would not allow for... » More
After barking up the wrong tree for a while I discovered via StackExchange how to reset a Slurm Node reporting as drained. Run the scontrol command then update the node as shown in the following example commands (amend the word jacob here to the name... » More
I needed to give all students read access to a demo database and did so with: mysql> GRANT SELECT ON gameofthrones.* TO ''@localhost; Query OK, 0 rows affected (0.00 sec) mysql> FLUSH PRIVILEGES; Query OK, 0 rows affected (0.01... » More
To create a kerberos keytab file on Ubuntu and with the kerberos packages installed (e.g. sudo apt-get install krb5-user ) root@jmcc02:~# ktutil ktutil: addent -password -p myusername@DOMAIN.TLD.COM -k 1 -e RC4-HMAC Password for... » More
In the annals of "Everyday is a learning day". I have an Apache server hosting student websites, and the number of websites grew to over 700 within a day and Apache was complaining with error: unable to open logs It took a little while to narrow down... » More
I am rolling out some Linux desktops, specifically Ubuntu, and I wanted to customize the icons available in the Unity Launcher. I wanted to remove the LibreOffce Calc and Impress icons and the darned 'Amazon' one, so: Create a new gschema override... » More
I wanted to generate a password hash for use in the /etc/shadow file. My local Linux Mint (Ubuntu) Desktop already has mkpasswd available, your distribution may vary. mkpasswd -m SHA-512 This prompts for the password and will generate the... » More
The command to list the directories using the most inodes is: find . -printf "%h\n" | cut -d/ -f-2 | sort | uniq -c | sort -rn However, I first needed to narrow down the directory under root that might be causing the problem: df -i showed that the... » More
This Powershell script will use nslookup to query a DNS Server to get the hostname and use that result to set the computer name. If you use this you will need to amend as necessary including the address of the DNS Server (I have added the Google one... » More
I needed to give all students read access to a demo database and did so with: mysql> GRANT SELECT ON gameofthrones.* TO ''@localhost; Query OK, 0 rows affected (0.00 sec) mysql> FLUSH PRIVILEGES; Query OK, 0 rows affected (0.01... » More
