"Test Article: How"
The <h3> Section: Lists
- Human Quotes
- Block Quotes
- Code
The <h4> Section
This section header uses the <h4> element
Human Quotes
The only reason for time is so that everything doesn't happen at once. —Albert Einstein
Why can't I just eat my waffle? —Barack Obama
Backticks to Create Type
Using backticks and a string ```x to create a <pre class="x"> element. Here we make a ```file type.
Create a file called requirements.txt with this content:
jinja2 == 3.1.4
scons == 7.1
Today I logged in to an older machine, and tried to clone one of my repos from GitHub. I got an unusual warning message about the fingerprint that helps identify the host.
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)!
Checking with GitHub, I see that the fingerprint shown is correct, so I need to fix my ~/.ssh/known_hosts file.
I'll search my known_hosts file for "github" and use -i to make the search case insensitive.
cat ~/.ssh/known_hosts | grep -i "github" | tail -c 16
ap43JXiUFFAaQ==
The tail -c 16 writes out just the tail end of the fingerprint for any hits.
Since the known_hosts file can list fingerprints using either a host name or an IP address,
I should probably search for every line that has the same ending. I also use cut to get just the the host or IP address.
cat ~/.ssh/known_hosts | grep "ap43JXiUFFAaQ==" | cut -w -f1
github.com,192.30.255.112 192.30.255.113 140.82.112.3
It turns out I have three entries that match, so I issue three command to remove hosts using keygen -R:
ssh-keygen -R 'github.com'
ssh-keygen -R '192.30.255.113'
ssh-keygen -R '140.82.112.3'
Foot Notes
sw_vers | grep "Product" | sed -E 's/^.*:\t*(.*)/\1 /' | tr -d '\n'
$SHELL --version
macOS 14.5 zsh 5.9 (x86_64-apple-darwin23.0)
Generated HTML with
MD2HTML=( --standalone --template template.html -f gfm )
FILE="ssh-clean-up.md"; pandoc ${MD2HTML} $FILE -o $FILE.html