Dragging a file into your terminal pastes the file path

You can use fold:

fold -sw 60

You can now paste your texts. fold will echo them back, word-wrapped after 60 columns. Exit with Ctrl+C or Ctrl+D.

You can also use files for input and output:

fold -sw 60 input.txt > output.txt

By default, your terminal emulator (Gnome Terminal, Terminator, etc.) sets some kind of window title to reflect the shell type you are running (e.g. /bin/bash).
This is most often not too helpful, but you can change that from your shell.

To set...

Grep prints one line per match. To return the number if matches, use the -c switch:

grep -c "something" filename

However, if a word appears more than once in a line, it is only counted once.

To count every match, you can use [sed](http:...

When using the screen tool you may be unable to start a screen session but instead encounter an error:

Cannot open your terminal '/dev/pts/0' - please check.

This is because another user (you) initiated the current terminal -- you probably...

If you are on a Linux shell and want to open a file with whatever default application is configured for that type, this often works:

xdg-open Quote.odt
xdg-open invoice.pdf
xdg-open index.html

Pro Tip

Make an alias so you ...

Boot partitions from installations prior to the 16.04 era are terribly small. When you install updates and encounter errors due to a full /boot partition, consider risizing it.

If you can't do the steps described below, ask someone experienced ...

The buffer where text is put into when you double-click on text within X is called X selection.

You can paste this buffer (at least into a terminal window) by pressing Shift + Insert.

A good tool to generate strong passwords and secrets is "apg". You can get it with

sudo apt-get install apg

To create a strong secret for sessions, [hashed Paperclip paths](https://makandracards.com/makandra/734-deliver-paperclip-attachments...

Sometimes you may want to print files from the command line, especially when you have lots of them.
You can use lp for that.

To print a single example.pdf file on your default printer, simply say:

lp example.pdf

lp accepts multipl...

When using gnome-open (i.e. double-clicking a file, telling to browser to open a download, etc.) on Ubuntu you may get this error:

The location is not a folder.

It's due to the exo-utils package which [does not play nice with gnome-open]...