rueycheng

GNU Make Cheatsheet

Based on https://www.gnu.org/software/make/manual/html_node/Quick-Reference.html

Directives

Directive	Description
define variable define variable = define variable := define variable ::= define variable += define variable ?= endef	Define multi-line variables.
undefine variable	Undefining variables.

nicowilliams

I recently happened upon a very interesting implementation of popen() (different API, same idea) called popen-noshell using clone(2), and so I opened an issue requesting use of vfork(2) or posix_spawn() for portability. It turns out that on Linux there's an important advantage to using clone(2). I think I should capture the things I wrote there in a better place. A gist, a blog, whatever.

This is not a paper. I assume reader familiarity with fork() in particular and Unix in general, though, of course, I link to relevant wiki pages, so if the unfamiliar reader is willing to go down the rabbit hole, they should be able to come ou

jatcwang

! model
  pc101           Generic 101-key PC
  pc102           Generic 102-key (Intl) PC
  pc104           Generic 104-key PC
  pc105           Generic 105-key (Intl) PC
  dell101         Dell 101-key PC
  latitude        Dell Latitude series laptop
  dellm65         Dell Precision M65
  everex          Everex STEPnote
  flexpro         Keytronic FlexPro

daronco

Config Apache with /etc/apache2/conf-available/le.conf:

Alias /.well-known/acme-challenge/ "/var/www/html/.well-known/acme-challenge/"
<Directory "/var/www/html/">
    AllowOverride None
    Options MultiViews Indexes SymLinksIfOwnerMatch IncludesNoExec
    Require method GET POST OPTIONS
</Directory>

JonCole

Some of the Redis best practices content has moved

This content from this markdown file has moved a new, happier home where it can serve more people. Please check it out : https://docs.microsoft.com/azure/azure-cache-for-redis/cache-best-practices.

NOTE: Client specific guidance listed below is still valid and should still be considered. I will update this document once all content has been moved.

key-amb

.PHONY: update update-all all

update:
	git pull origin master
	git submodule update --init

update-all: update
	git submodule foreach git pull origin master

all: update-all

samiraguiar

Note for newcomers:

In the shortcuts below, "C" stands for CTRL and "A" stands for "ALT". This is a convention
used in the Midnight Commander documentation and was kept here.

You can also use "ESC" instead of "ALT", which is useful on Macbooks.

Main View
---------------------------------------------------------------
- File/directory operations

Apkawa

Last updated: 2015-08-11

Searching for Files

Find images in a directory that don't have a DateTimeOriginal

exiftool -filename -filemodifydate -createdate -r -if '(not $datetimeoriginal) and $filetype eq "JPEG"' .

###Output photos that don't have datetimeoriginal to a CSV### Note this can take a long time if you have a lot of jpgs

alechko

# connect your camera with USB cable, for 6D model you have to disable the WiFi first.
# then see if camera is connected by using:
gphoto2 --auto-detect
# if you see something like:
# 
#  user@x250:~$ gphoto2 --auto-detect 
#  Model                          Port                                            
#  ----------------------------------------------------------
#  Canon EOS 6D                   usb:001,006     
# 

porjo

Convert sequence of JPEG images to MP4 video

Simple glob:

ffmpeg -r 24 -i '*.JPG' -s hd1080 -vcodec libx264 timelapse.mp4

Start from DSC_0079.JPG

ffmpeg -r 24 -f image2 -start_number 79 -i DSC_%04d.JPG -s hd1080 -vcodec libx264 timelapse2.mp4