Multiple git accounts

Using multiple ssh keys for multiple gits:

https://gist.github.com/jexchan/2351996

Add the ssh keys on github

Some possible "git config --list" options are "--local" and "--global"
If you don't specify --global, it takes the local config by default.

To display the actual  “git config” do:
git config --list

git config user.name

git config user.email

Before you commit, you need to be sure you are using the correct one.
You can set it by doing:

git config user.name "abc"

git config user.email "abc@abc.com"

The local config will be saved in .git/config
The global config is saved in ~/.gitconfig

"url" must be a git@something  in .git/config, should not be https. If it is https, use:

“git remote set-url origin git@github.com:me/gg-linux.git”

It will change your .git/config

_______ git clone
Even if the keys are on github, you may want to use a specific name/email
You can use
git clone XX -c user.name=toto -c user.email=toto@toto.com (this will set .git/config)
or
git config --global user.name "xxx"
git config --global user.mail "xxx"
git clone git@github.com:youruser/myj-gh     (need ssh keys)

______________ Just using ~/.ssh$ more config 

Host *.internal 10.*

identityfile ~/.ssh/id_rsa

Host *github.com

identityfile ~/.ssh/id_rsa_github

Google services empty the battery

Android is up to date.
Google Services is making continuous network access and empty the battery. It stops when network is disabled.

solution: register for the Google Services beta program. That's the only way to update/change Google Services
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Mac survival kit

• ask different
• https://apple.stackexchange.com/
• fonctionalities
• fn + F12.  go to dashboard (calendar, calculator)
• about .bash_profile
• https://stackoverflow.com/questions/49997987/where-is-the-profile-file-on-mac/49998052#49998052
• MacOS (formerly OS X) is based on BSD Unix
• https://en.wikipedia.org/wiki/MacOS#/media/File:Unix_timeline.en.svg
• list of installs made:
• less /Library/Receipts/InstallHistory.plist
• machine info
• sysctl -n machdep.cpu.brand_string
• system_profiler | grep Processor
• system_profiler
• updatedb
• (base) lee@a8:~$ sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.locate.plist
• (base) lee@a8:~$ sudo /usr/libexec/locate.updatedb
• (base) lee@a8:~$ locate logs
• install kdiff3
• brew cask install https://raw.githubusercontent.com/Homebrew/homebrew-cask/6a96e5ea44803e52a43c0c89242390f75d1581ab/Casks/kdiff3.rb 
• if you need to untar things like mvn, you can do so in /usr/local using sudo. Other folders are protected even using sudo 
• colors
• console and vi: 
• go to terminal (console) / preferences / Profiles / Basic / ANSI Colors
• change them
• brew
• brew list
• brew doctor
• brew services list
• brew services info docker-machine 
• brew services start tomcat
• zsh
• ps -ef,   htop prefered
• sometimes buggy, switch to bash 
• ex: find . |grep ".py"|xargs grep fill  (not working on my zsh)
• this works on zsh but not on sh for big files
• sort -u toto.txt > out.txt

• network (use bash)

• tcpdump -n -A -p -i lo0 host 127.0.0.1 > tmp.txt

• java
• installed JVM
• lee@al8:~/dev/nemo-etab-etl$ /usr/libexec/java_home -V
• Matching Java Virtual Machines (3):
•     17.0.10 (x86_64) "Oracle Corporation" - "Java SE 17.0.10" /Library/Java/JavaVirtualMachines/jdk-17.jdk/Contents/Home
•     15.0.2 (x86_64) "Oracle Corporation" - "Java SE 15.0.2" /Library/Java/JavaVirtualMachines/jdk-15.0.2.jdk/Contents/Home
•     11.0.7 (x86_64) "Oracle Corporation" - "Java SE 11.0.7" /Library/Java/JavaVirtualMachines/jdk-11.0.7.jdk/Contents/Home
• /Library/Java/JavaVirtualMachines/jdk-17.jdk/Contents/Home
• ll /Library/Java/JavaVirtualMachines/
• switch version, just change JAVA_HOME
• # export JAVA_HOME="/Library/Java/JavaVirtualMachines/jdk-11.0.7.jdk/Contents/Home"
• export JAVA_HOME="/Library/Java/JavaVirtualMachines/jdk-17.jdk/Contents/Home"

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install nvidia driver on Ubuntu

https://websiteforstudents.com/install-proprietary-nvidia-gpu-drivers-on-ubuntu-16-04-17-10-18-04/

lshw -c video

(driver for NVidia GK107GL [Quadro K600]:
sudo apt install nvidia-346)

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Data types comparison

\	JSON	Python	STL
object	JSON object {   "fist_name" : "John",   "last_name" : "Doe" } (necessarely key-value pairs, also called properties, key unique)	object	object
immutable list		tuple t="a",b,123 or t=("a",b,123)	tuple
dynamic array, ordered, value not unique	JSON array ["a","b","c","a"']	not supported, use lists instead	vector
doubly-linked list, key not unique		list [a,b,c,a]	list
tree, sorted, key unique		set {a,b,c}	set
map, key unique	dictionary (actually object) {"a":"b", "c":"d"}	dictionary {"a":"b", "c":"d"}	map

dynamic array: get realloc depending on its evolving size.
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