Winston (Winny) Weinert winny-

Use prefix + :, then type in capture-pane -S -3000 + Return. (Replace -3000 with however many lines you'd like to save, or with - for all lines.) This copies those lines into a buffer.
Then, to save the buffer to a file, just use prefix + : again, and type in save-buffer /home/{user}/filename.txt + return.

(By default Prefix is Ctrl+B.)

Managing firewalld

firewall-cmd --state     # Display whether service is running
firewall-cmd --reload    # To reload the permanent rules without interrupting existing persistent connections

list details of default and active zones

firewall-cmd --get-default-zone

Renew GPG key

Given that your key has expired.

$ gpg --list-keys
$ gpg --edit-key KEYID

Use the expire command to set a new expire date:

Regular Colors

Value	Color
\e[0;30m	Black
\e[0;31m	Red
\e[0;32m	Green
\e[0;33m	Yellow
\e[0;34m	Blue
\e[0;35m	Purple

How to add a collapsible section in markdown

1. Example

Click me

Heading

Foo
Bar
- Baz

Qux

Disclaimer: Please follow this guide being aware of the fact that I'm not an expert regarding the things outlined below, however I made my best attempt. A few people in IRC confirmed it worked for them and the results looked acceptable.

Attention: After following all the steps run gdk-pixbuf-query-loaders --update-cache as root, this prevents various gdk-related bugs that have been reported in the last few hours. Symptoms are varied, and for Cinnamon the DE fails to start entirely while for XFCE the icon theme seemingly can't be changed anymore etc.

Check the gist's comments for any further tips and instructions, especially if you are running into problems!

Screenshots

Results after following the guide as of 11.01.2017 13:08:

	(defun mode-for-buffer (&optional buffer-or-string)
	"Returns the major mode associated with a buffer."
	(with-current-buffer (or buffer-or-string (current-buffer))
	major-mode))

	(defun my-dired-copy-or-move-other-window (operation)
	"Copy or move the marked files to another directory.
	OPERATION is a symbol, either `COPY' or `MOVE' .
	This works with files or directories."
	(unless (eq major-mode 'dired-mode)

	;;; ob-gdb.el --- Babel Functions for Gdb Evaluation -- lexical-binding: t; --

	;;; Commentary:

	;; Org-Babel support for running gdb

	;;; Code:

	(require 'org-macs)
	(org-assert-version)

	#lang racket/base

	(define (signed-var-int val)
	(cond
	[(bitwise-bit-set? val 31)
	(bitwise-ior val (bitwise-not #xffffffff))]
	[else
	val]))

	(define (read-var-int in)

	# see also: /lib/udev/hwdb.d/60-keyboard.hwdb
	evdev:atkbd:dmi:bvn:bvr:bd:svnHewlett-Packard:pnEliteBook:pvr*
	KEYBOARD_KEY_81=f20 # Fn+F8 on Elitebook, map to F20
	# KEYBOARD_KEY_81=fn_esc # org entry