A Technical I.T./DevOps Blog
Question
What patriotic songs were written during the American Revolution?
Answer
“The Toast” by Francis Hopkinson
“World Turned Upside Down” (instrumental)
“The Liberty Song” by John Dickinson
“Free America” by Joseph Warren
“Chester” by William Billings; see also: https://en.wikipedia.org/wiki/William_Billings
“Yankee Doodle“
“My Days Have Been So Wondrous” by Francis Hopkinson.
…
Continue reading “What Are Some Songs During the American Revolution?”
Problem scenario
You are using Linux, and you want to know what JQuery version is installed. What do you do?
Solution
JQuery is a library to work with Javascript. There are many ways to install JQuery: git, using a .tar.gz file, the YARN CLI, or the npm command.
If it was installed with npm, one way find out the version is to run one of these command:
npm view jquery versions
npm view jquery version
npm view jquery
npm info jquery
npm ls jquery
This solution was partially taken from this external page.
…
Continue reading “How Do You Find the JQuery Version from the Command Prompt of a Linux Server?”
Problem scenario
You run a command, but you get a message like “filenotfounderror”, “file or directory does not exist” or something similar. What should you do?
Possible Solution #1 (assuming that the file exists)
Do either i. or ii.
i.a. Find the original file with a command like this: sudo find / -name foobar
i.b. Create a symbolic link or a hard link to the file.
…
Continue reading “How Do You Troubleshoot a “File Not Found” Message?”
Question
You are not sure if muscles really flex. You are curious if joints flex at all. Do either human muscles or human joints flex?
Answer
Muscles do not flex, but joints do flex. Muscles contract. Joints can “flex and extend.” Source: Page 100 of Starting Strength. Another source is https://www.pumpone.com/blog/39.
…
Problem scenario
You open a terminal window in Linux. You get an error like one of the following:
flatpak: /lib64/libldap_r-2.4.so.2: no version information available (required by /lib64/libcurl.so.4)
flatpak: error while loading shared libraries: libsasl2.so.2: cannot open shared object file: No such file or directory
What should you do?
Solution
(This solution will work if the file is in a different location from where it was expected on your server.)
1.
…
Problem scenario
Your NIC on your Fedora Linux server totally will not work. The physical NIC has no lights on it. It seems it is disabled. You cannot enable it with commands.
You see errors like these in logs: “NetworkManager.service: Start request repeated too quickly.”
What should you do?
Solution
Run this command:
journalctl -u NetworkManager
Do you see lines like these?
…
Continue reading “How Do You Get a NIC on a Linux Server to Work?”
Problem scenario
You work out regularly at a fitness gym. Is exercise the same as training?
Answer
Exercise is physical activity. Training involves a long-term goal designed to achieve results that will include regular physical activity. Training would include progressively more weights for specific lifts and/or cardio that is increasingly intense or longer in duration.
Source: Starting Strength page 292.
…
Problem scenario
A NIC or network interface is not being protected by a zone in the firewalld. You run firewall-cmd commands, and later run “firewall-cmd –runtime-to-permanent” afterward. But a NIC (e.g., a virtual NIC) will not persistently remain in a zone. You want your firewall-cmd commands to have a permanent effect. The “firewall-cmd –runtime-to-permanent” command is supposed to work, but it is not helping. What should you do?
Solution
Run the individual firewall-cmd commands with the “–perm” flag.
…
Continue reading “How Do You Get a NIC to Permanently Be in a firewalld Zone with a Single Command?”
Problem scenario
A NIC or network interface is not being protected by a zone in the firewalld. You run firewall-cmd commands with different flags, but some NIC (e.g., a virtual NIC) will not persistently remain in a zone. You want your firewall-cmd commands to have a permanent effect. The –permanent flag is supposed to work, but it is not helping. What should you do?
Solution
If a firewall-cmd command fails with a –permanent flag,
…
Problem scenario
You want to not broadcast your home’s network (e.g., to make sure people do not borrow your bandwidth or hack your devices such as your thermostat with ransomware). You want to keep using your WiFi. You try to disable the “Broadcast Network Name (SSID)”, but you get a prompt like “WARNING:
Disabling Broadcast Network Name (SSID) will disable Wi-Fi Protected Setup (WPS) functionality. Are you sure you want to change?”
Should you click “OK”?
…
Continue reading “Should You Disable WPS on Your WiFi/Router at Home?”