Bash: How To Join Array With Comma Delimiter
# The following function joins an array of numbers # Limitation: the delimiter is expected…
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Puppet Client Server Lab Setup
Server # Setup client machine name sudo vim /etc/hosts ## Insert this line ## xx.xx.xx.xx…
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How to Install Selenium for Python on Windows or Linux
Windows # This error would occur if pip is not up to date PS C:\WINDOWS\system32>…
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How To Run Python Interactive Command Line Mode (CLI)
Windows PS C:\WINDOWS\system32> python Python 3.8.0 (tags/v3.8.0:fa919fd, Oct 14 2019, 19:37:50) [MSC v.1916 64 bit…
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Disable and Enable Sleep Mode on a Linux Workstation
The following commands would work on any Linux machine with SystemD (Ubuntu, Linux Mint, Redhat,…
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Linux SMB Mount via Command Line Bash Shell
Install smbfs to include these functions smbmount smbunmount Here is a demonstration of smbmount to…
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Linux: How To Repair Corrupted Zip File
kimconnect@linuxbox:/media/data/newPhotos $ zip -FF corrupted.zip --out fixed.zip Fix archive (-FF) - salvage what can zip…
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Linux: Copy File Contents Into Clipboard
Install XCLIP (if not already installed) sudo apt install xclip -y Reading package lists... Done…
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How to Use ImageMagic to Resize Images
Converting PNG to JPG (optimized): # This is an optimized resizing command to convert PNG…
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Uhhuh. NMI received for unknown reason 3d on CPU 4
Problem: Message from syslogd@linux03 at Aug 31 04:28:21 ... kernel:[273033.123489] Uhhuh. NMI received for unknown…
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Ping Command’s First Packet Toward LDAP Server(s) Takes 2 Seconds to Start
Case 1: Are DNS servers working? dig returns results right away => defined dns servers…
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How To Install Graylog in a Kubernetes Cluster Using Helm Charts
The following narrative is based on the assumption that a Kubernetes (current stable version 20.10)…
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How to configure Ubiquiti EdgeRouter to send logs to a Syslog Server
Method 1: using text editor # Edit the syslog config sudo vi /etc/rsyslog.d/vyatta-log.conf # Change…
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How To Configure Alternative Storage for a Kubernetes (K8s) Worker Node
The below illustration is assuming that one has a local RAID mount being added to…
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Ubuntu: Auto Updates Configuration
Prepare the Linux OS: # Install auto-update packages sudo apt install -y unattended-upgrades apt-listchanges #…
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Linux: Testing Disk Speed
Below is an exercise in comparing 2 different media: external USB drive vs a SD…
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Linux: RSYNC Examples
Following are a few practical uses of this command: # Copying from a Local Directory…
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Linux: Commands to Add a New Disk
# Step 1: create partitioning table (gpt or msdos/mbr) device=/dev/sdc sudo parted $device mklabel gpt…
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Problem: NextCloud Would Not Start Due to Versioning Variance
This issue has occurred when NextCloud has been upgraded after deployment. Its source docker container…
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NextCloud Container PHP Memory Issue as Deployed via Kubernetes
Most common example:Below is a raw text paste of an exercise in resolving the issue…
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