Category Archives: Linux

Cscope search results are invisible

Posted on February 13, 2024 by dsg_admin

Part of my ‘day job’ is trolling thru source code when looking for answers. My preferred mechanism, other than a recursive grep, is to use cscope Cscope is a useful tool for searching a source code tree after you build … Continue reading →

Posted in Command Line FU, Linux | Leave a comment

What every Programmer *should* know about Memory

Posted on October 4, 2023 by dsg_admin

For my fellow Insomniacs out there… If you are up scrolling your phone for things around the Google-verse to read to shut off your brain so you can possibly go to sleep.. I came across this article on LWN which … Continue reading →

Posted in Internals, Linux | Leave a comment

Obtain the grub boot parameters from /var/log/messages

Posted on September 20, 2023 by dsg_admin

There are times you may need to quickly confirm the grub boot parameters that were issued either at the console (or by default) This information is logged to /var/log/messages when you grep with keywords “Kernel command”

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Display ethernet devices on a Fedora system using the Linux Pseudo Filesystem and create a static IP Address

Posted on September 11, 2023 by dsg_admin

Encountered a fun riddle recently whereby on a Fedora 34 system I needed to locate all ethernet interfaces on a system that are obtaining a DHCP address, then after the first reboot create a static IP address. I am a … Continue reading →

Posted in Command Line FU, Linux, Networking | Tagged , , | Leave a comment

Modify gnome dock from the command line

Posted on September 8, 2023 by dsg_admin

To modify the gnome desktop dock (i.e. launcher or launchpad) from the command line an easy way is to perform the following: This above will add Firefox, The File Manager, Terminal, Terminator and Gnome Settings to the desktop

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Downloading an RPM package including all of its dependencies on Fedora

Posted on September 8, 2023 by dsg_admin

There are times when you need to fully download an RPM and all of its dependencies. However, If you have already downloaded the RPM re-downloading the RPM and all its dependencies can be very difficult. I have found the following … Continue reading →

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List only ethernet Network Adapters on Debian/Fedora

Posted on September 7, 2023 by dsg_admin

Sometimes you want a quick way to verify all ethernet network adapters that are seen by the kernel at boot time. I find going directly to the pseudo filesystem is the fastest. For example. Similarly, you an modify the egrep … Continue reading →

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Remove any potential special characters or spaces from an IP address using AWK

Posted on July 12, 2023 by dsg_admin

Got stuck earlier in an interesting regex mystery and I command-line FU’d an AWK Solution. PROBLEM I want to strip out all spaces and/or special characters from an IP address PROCESS I know how to validate an IP address no … Continue reading →

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Sudo password fails even though it is correct [Fedora]

Posted on April 15, 2023 by dsg_admin

Newer fedora distros keep track of authentication failure attempts. This may prevent sudo from working even though the password is correct! In this example, I verified my user ‘ben’ is in /etc/sudoers Yet when I performed a simple operation the … Continue reading →

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Obtain list of all physical hard drives (SSD, NVMe, VDA, HDD)

Posted on March 20, 2023 by dsg_admin

I came across an issue recently whereby I had a need to display all physical hard drives on a system whether it be HDD, VHD, or SSD (NVMe) drives that were above a certain size, excluding any USB or CD-ROM/DVD … Continue reading →

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