• Add SSH to the Git Service
• Run ssh-add locally
• Connect via ssh to your server

ssh-add
ssh user@host

git status
git ...

Check status of ssh-add

ssh-add -l

Delete all keys from current process

ssh-add -D

In .htaccess:

<Files myfile.php>
AuthType Basic
AuthName "Authentication Required"
AuthUserFile /path/to/.htpasswd
Require valid-user
</Files>

As of 2019, the minimum window width for both Chrome and Safari browser windows is 500px. Which is might annoying, if your are developing a site with breakpoint at less than 500px.

window.open(
  'https://codec.trembl.org/939',
  'myDevWindow',   
  'width=400,height=400,resizable,scrollbars=yes,status=yes'
)

Example:

Observations:

In Chrome, the window becomes fully resizable, up to a 188 x 113px - which seems to be the absolute minimal window size.

In Safari, the window becomes resizable up to the specified size, the minimum size being 100px wide and 77px high.

htpasswd -nb username password

Using just -n username will prompt twice for the password.

htpasswd -n username

From htpasswd man:

-n Don't update file; display results on stdout.
-b Use the password from the command line rather than prompting for it.

awk 'NR % 2 == 1' // every 2nd line
awk 'NR % 10 == 1' // every 10th line
awk 'NR % 100 == 1' // every 100th line

NR ordinal number of the current record

N == 1 keeps the first line intact, whereas N == 0 would remove the first line. Important for CSV files.

tar -vcf target.tar source

v → verbose
c → create
f → file. word followed by f will be name of archive, f needs to be last in the command.

ssh -i ~/.ssh/path_to_key username@server

Background:

A site that was developed some years ago with Wordpress 4.x and ACF 4.x got moved to a new server. During the migration process, Wordpress and the Plug-ins were updated to their latest version - I assume, before the MySQL DB got migrated, which let to the following complaint:

"ACF are not showing in ACF 5.x"

After some detective work, I realise that the data was still present. ACF v4.x was storing the ACF data in wp_options, ACF v5.x is storing it in wp_termmeta.

Which is great, because all that is needed, is to update the DB! But how to do it?

First attempt: Re-install ACF 4.4.12, then update to ACF 5.x

Didn't work as expected.

Second attempt: change the acf_version in wp_options

In the wp_options, the acf_version is set to the current WP version, 5.7.6 in this case. Setting it to 4.4.12, triggered the ACF DB update script, the ACF data got migrated to wp_termmeta, the site is working again as expected.

Shout out to the ACF Support Pages for solving the last piece of the puzzle.

301 Redirect is great, if you want to keep you old structure and only change the server.

.htaccess

Redirect 301 / https://www.trembl.org/

Any page of your old.site/about would get redirected to https://www.trembl.org/about.

If you want to redirect all your page links from your old.site (e.g. old.site, old.site/aaa, old.site/bbb, ...) to https://www.trembl.org, use this RewriteRule:<

.htaccess

RewriteEngine On
RewriteRule ^(.*)$ https://www.trembl.org/ [R=301]

Meaning of 301 and 302

• 301 Moved Permanently
• 302 Moved Temporarily

Set Levels by Value x$name <- factor(x$name, levels = x$name[order(x$val)])

Set Levels by Name, Reverse Name Vector, first Name on top df$name <- factor(df$name, levels = rev(df$name))

TODO:

• Explain/Understand R Factors
• Add Example Data
• Add Example Graphics

Source: https://rstudio-pubs-static.s3.amazonaws.com/7433_4537ea5073dc4162950abb715f513469.html