Technology Insights

Set Opera Web Browser To Update Automatically Or To Notify Of New Opera Updates Only

As of Opera 10 you can set Opera to update automatically, notify of updates only, or to not even check for updates. I don’t use Opera daily however I probably do use it at least once a week for various tasks such as torrent downloads. Recently when I launched Opera it let me know that an update was available and asked if I wanted to download and install. I quickly clicked yes to upgrade Opera but realized that there was another option that was checked to upgrade Opera automatically in the future. I personally like to be notified about upgrades and then run the upgrade myself when it is convenient so I needed to modify this setting back to only notify me of new Opera updates. Below are instructions on how to set Opera web browser to upgrade automatically, notify you of Opera browser updates, or to not even check for new updates available for the Opera web browser.

Technology Insights

PostgreSQL Log Entries: CDTLOG: statement: SHOW client_min_messages

I was troubleshooting an issue at work the other day regarding some PostgreSQL connections that were not closing. They were left IDLE, never closed, and eventually used up all of the possible connections (which totaled 100) configured in the  postgresql.conf configuration file. In the process of troubleshooting I noticed a bunch of Postgres log entries that I was unable to immediately pin down to what was causing the entries. Below I describe the view of the idle Postgres connections, the PostgreSQL log entries that were unfamiliar, and the cause of both.

Technology Insights

Send A Text Message From A Shell To A User Logged Into A Linux Server

This topic is fairly known to most older system administrators however I doubt it is used very often anymore. If you happen to manage any servers where there are typically various people logged in and working on different items from the CLI then it can be useful to be able to send them messages. Using the write command you can send messages to users logged in on specific TTY port or by username. Below are a couple examples of how you would use the write command from a Linux shell.

Technology Errors

Building CUDA-Multiforcer Error: /usr/bin/ld: cannot find -lcutil, collect2: ld returned 1 exit status

While building the CUDA Multiforcer on CentOS Linux I ran into a couple of different errors. One of the errors is noted below in more detail along with how I was able to resolve the error. The problem ended up being that I didn’t build the common Nvidia SDK tools before proceeding with installing the CUDA Multiforcer which is compiled from within the Nvidia SDK directory.

Technology Errors

CUDA-Multiforcer: error while loading shared libraries: libcudart.so.2: cannot open shared object file: No such file or directory

After installing a new server recently that uses Nvidia video cards to take advantage of their GPU capabilities I ran into an error while running a program called CUDA-Multiforcer. The CUDA-Multiforcer application is a security audit tool used to check the strength of password hashes encrypted using MD4, MD5, NTLM, or SHA1. After compiling the CUDA-Multiforcer and installing various Nvidia packages I ran into an error with the libcudart.so.2 library. Below I describe the error in more detail as well as what I did to resolve the error.