In Linux you can use Audacity: record after setting correctly in Pulse Audio Volume control -> beginning with monitor ….
See for details this tutorial.
KDE no longer working
If your smartphone doesn’t connect any more with the PC, the problem could be <b>the firewall</b>.
To fix this, you can:
1.install gufw
2.Open gufw from app launcher
Go to the Rules tab
Click the [+] button to add a new rule
Select the direction “Both”
Select category “Network:
Select Application “KDE connect”
Click “Add”
Done!
regex replace all the text within an html tag
If you want, for example, delete all styles tag within several html in an epub file, keeping only the stylesheet linked in them, you can use this command:
<style type="text/css">(.|\n)*?<\/style>
Calibre editor in this case is better than Sigil, for epub files.
remove duplicate lines from a text file
To remove duplicate lines from a text file in Linux you can use this command
awk '!seen[$0]++' "inputefilename" > "outputfilename"
FreeDCam
It is an interesting android open source camera app, which allows you to control the smartphone camera in a very detailed way.
Unfortunately it hasn’t an easy graphical interface: therefore you should know that a) you can get settings sliding the screen (from left and from bottom); b) you must set an external storage, otherwise you won’t be able to take any photo.
regex replace keeping a part of a string
Today I managed to replace (in html file links and anchors) absolute paths with relative ones.
I needed to keep the anchors and links number.
I did so:
search: href="#_ftn([0-9])">
replace: href="#_ftnref\1" id="_ftn\1">
In this way href=”#_ftn1 was replaced by href="#_ftnref1" id="_ftn1", href=”#_ftn2 was replaced by href="#_ftnref2" id="_ftn2", and so on.
For numbers with two digits
search: href="#_ftn([0-9][0-9])">
replace: href="#_ftnref\1" id="_ftn\1">
Only the search string is to be modified, if you have more digits (f.e. [0-9][0-9][0-9][0-9] if you have numbers with four digits, such as 1276), not the replace one (so don’t write \1\1).
digits within brackets
To replace digits within brackets you have to escape the brackets with ‘\’, thus: ‘\(‘, or ‘\[‘. For example, if you plan to convert every ‘(some digits) ‘ with ‘</p><p>(some digits)’, you should use this code:
find: \(([0-9])\)
replace: </p><p>(\1)update wordpress in localhost
First of all backup your database follwing these insctructions.
- Get the latest WordPress zip (or tar.gz) file.
- Unpack the zip file that you downloaded.
- Deactivate plugins.
- Delete the old
wp-includesandwp-admindirectories on your web host (through your FTPor shell access). - Using FTP or your shell access, upload the new
wp-includesandwp-admindirectories to your web host, in place of the previously deleted directories. - Upload the individual files from the new
wp-contentfolder to your existingwp-contentfolder, overwriting existing files. Do NOT delete your existingwp-contentfolder. Do NOT delete any files or folders in your existingwp-contentdirectory (except for the one being overwritten by new files). - Upload all new loose files from the root directory of the new version to your existing WordPress root directory.
NOTE – you should replace all the old WordPress files with the new ones in the wp-includes and wp-admin directories and sub-directories, and in the root directory (such as index.php, wp-login.php and so on). Don’t worry – your wp-config.php will be safe.
Be careful when you come to copying the wp-content directory. You should make sure that you only copy the files from inside this directory, rather than replacing your entire wp-content directory. This is where your themes and plugins live, so you will want to keep them. If you have customized the default or classic themes without renaming them, make sure not to overwrite those files, otherwise you will lose your changes. (Though you might want to compare them for new features or fixes..)
Lastly you should take a look at the wp-config-sample.php file, to see if any new settings have been introduced that you might want to add to your own wp-config.php.
More details here.
folding code in Kate
Today I noticed that if I write [b]BEGIN[/b] in a row that row is the beginning of a collapsable section, until a row with [b]END[/b].
F.e. /* — BEGIN common tags — / as beginnning and / — END common tags — */ as end.
And I can have nested collpsable sections, even in an html file ( , f. e.)
image-map online
A good, simple and free, website is ImageMap Generator, but you have to save your code after defining 3 or 4 map areas, otherwise the code will result wrong.
svg with external image embedded
All browsers have this limitation: they not allow to show an svg with an external image embedded, such as
<image x="2" y="2" width="somewidth" height="someheight" xlink:href="myimage.jpg">even though the image is in local.
For security reasons.