Install pdftk on Ubuntu.
sudo apt update
sudo apt install pdftk-java
Join .PDF files into a new .PDF file using the following command.
pdftk input1.pdf input2.pdf input3.pdf cat output outfile.pdf
You can use a wildcard (*) for input files.
pdftk *.pdf cat output outfile.pdf
Go to Settings.
Select “Time & language”.
Select “Language & region”.
Select “Administrative language settings”.
In the Region dialog box, select “Administrative” tab.
Click “Copy settings” button.
Mark the check box next to “Welcome screen and system accounts”.
Click “OK” button.
When prompted, click “Restart” button to restart the system.
reload() method reloads a previously imported module. It enables you to test a updated version of the module without leaving the sage command line.
sage: reload(module)
Use importlib package.
sage: import importlib
sage: importlib.reload(module)
Serif fonts have a small stroke at the end of their longer strokes.
Serif fonts examples:
.serif-class {
font-family: "Times New Roman", Times, serif;
}
Sans serif fonts have clean lines without small strokes attached.
Sans serif fonts examples:
.sans-serif-class {
font-family: Arial, Helvetica, sans-serif;
}
A monospace font is a font in which all the letters have the same fixed width.
Monospace fonts examples:
.monospace-class {
font-family: 'Courier New', Courier, monospace;
}