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Install and run your first noSQL MongoDB on Mac OSX
Classified as a NoSQL database, MongoDB is an open source, document-oriented database designed with both scalability and developer agility in mind. Instead of storing your data in tables and rows as you would with a relational database, in MongoDB you store JSON-like documents with dynamic schemas; This makes the integration of data in certain types of application easier and faster.
Why?
MongoDB can help you make a difference to the business. Tens of thousands of organizations, from startups to the largest companies and government agencies, choose MongoDB because it lets them build applications that weren’t possible before. With MongoDB, these organizations move faster than they could with relational databases at one tenth of the cost. With MongoDB, you can do things you could never do before.
- Install Homebrew
$ /usr/bin/ruby -e “$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)”
Homebrew installs the stuff you need that Apple didn’t.
$ brew install wget - Install MongoDB
$ brew install mongodb - Run MongoDB
Create the data directory: $ mkdir -p /data/db
Set permissions for the data directory:$ chown -R you:yourgroup /data/db then chmod -R 775 /data/db
Run MongoDB (as non root): $ mongod - Begin using MongoDB.(MongoDB will be running as soon as you ran mongod above)Open another terminal and run: mongo
- Install Homebrew
References: https://docs.mongodb.com/manual/tutorial/install-mongodb-on-os-x/
Mac OS X Boot Process


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What is Mac OS X Boot Process:
The Mac OS X boot process involves several stages, in which the operating system performs various tasks to prepare the system for use.
- When the Mac is powered on, the firmware (a low-level software that controls the hardware) performs a power-on self-test (POST) to check the hardware components.
- The firmware loads the bootloader, which is responsible for loading the operating system kernel and transferring control to it. In Mac OS X, the bootloader is called the boot.efi file.
- The operating system kernel, which is the core of the operating system, initializes the system and starts the system services.
- The system services, such as the device drivers, are loaded and initialized.
- The operating system loads the user profile and starts the user interface, such as the desktop or the login screen.
- The user can log in and start using the system.
This is a general overview of the Mac OS X boot process. The exact sequence of events may vary depending on the specific version of Mac OS X and the hardware configuration of the system.
Boot ROM | Firmware. Part of Hardware system BootROM firmware is activated |
POST | Power-On Self Test initializes some hardware interfaces and verifies that sufficient memory is available and in a good state. |
EFI | Extensible Firmware Interface EFI does basic hardware initialization and selects which operating system to use. |
BOOTX | boot.efi boot loader load the kernel environment |
Rooting/Kernel | The init routine of the kernel is executed boot loader starts the kernel’s initialization procedure Various Mach/BSD data structures are initialized by the kernel. The I/O Kit is initialized. The kernel starts /sbin/mach_init |
Run Level | mach_init starts /sbin/init init determines the runlevel, and runs /etc/rc.boot, which sets up the machine enough to run single-user. rc.boot figures out the type of boot (Multi-User, Safe, CD-ROM, Network etc.) |
- Power is turned on.
- Open Firmware code is executed.
- Hardware information is collected and hardware is initialized.
- Something (usually the OS, but also things like the Apple Hardware Test, etc.) is selected to boot. The user may be prompted to select what to boot.
- Control passes to /System/Library/CoreServices/BootX, the boot loader. BootX loads the kernel and also draws the OS badges, if any.
- BootX tries to load a previously cached list of device drivers (created/updated by /usr/sbin/kextcache). Such a cache is of the type mkext and contains the info dictionaries and binary files for multiple kernel extensions. Note that if the mkext cache is corrupt or missing, BootX would look in /System/Library/Extensions for extensions that are needed in the current scenario (as determined by the value of the OSBundleRequired property in the Info.plist file of the extension’s bundle.
- The init routine of the kernel is executed. The root device of the booting system is determined. At this point, Open Firmware is not accessible any more.
- Various Mach/BSD data structures are initialized by the kernel.
- The I/O Kit is initialized.
- The kernel starts /sbin/mach_init, the Mach service naming (bootstrap) daemon. mach_init maintains mappings between service names and the Mach ports that provide access to those services.
From here on, the startup becomes user-level:
- mach_init starts /sbin/init, the traditional BSD init process. init determines the runlevel, and runs /etc/rc.boot, which sets up the machine enough to run single-user.
- rc.boot figures out the type of boot (Multi-User, Safe, CD-ROM, Network etc.). In case of a network boot (the sysctl variable kern.netboot will be set to 1 in which case), it runs /etc/rc.netboot with a start argument.
Source: http://osxbook.com/book/bonus/ancient/whatismacosx/arch_startup.html
Monitor Macbook


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How to Monitor Macbook with one single command?
$sudo sysdiagnose -f ~/Desktop/
The result is a compressed file named sysdiagnose_YYYY.MM.DD_HH-MM-SS-TTTT.tar.gz and it contains the following:
Accessibility
BluetoothTraceFile.pklg
DiagnosticMessages
Etienne’s SystemConfiguration
airport_info.txt
apsd-status.txt
bc_stats.txt
bootstamps.txt
brctl.tar.gz
breadcrumbs.txt
crashes_and_spins
darwinup.txt
dig-results.txt
disks.txt
diskutil.txt
error_log.txt
filecoordination_dump.txt
footprint-all.txt
fs_usage.txt
fsck_hfs_user.log
fsck_hfs_var.log
gpt.txt
ifconfig.txt
ioreg
ipconfig.txt
kextstat.txt
launchctl-list.txt
locale.txt
logs
lsappinfo.txt
lsmp.txt
lsof.txt
lsregister.txt
microstackshots
microstackshots_lastday.txt
microstackshots_lasthour.txt
microstackshots_lastminute.txt
mount.txt
netstat
nfsstat.txt
odutil.txt
pluginkit.txt
pmset_everything.txt
powermetrics.txt
ps.txt
ps_thread.txt
reachability-info.txt
resolv.conf
scutil.txt
smcDiagnose.txt
spindump.txt
stackshot-last-sym.log
sysctl.txt
sysdiagnose.log
system_profiler.spx
talagent.txt
taskinfo.txt
thermal.txt
top.txt
var_run_resolv.conf
vm_stat.txt
zprint.txt
You can use the top
command to monitor the resources of your Macbook in real-time. The top
command is a built-in utility that shows the processes that are currently running on the system, along with information about their CPU and memory usage.
To use the top
command, open a terminal window and type top
. The output will show the list of processes, sorted by their CPU usage, with the most CPU-intensive processes at the top. You can use the q
key to exit the top
command.
Here are some of the key options you can use with the top
command:
-o
: sort the processes by a particular resource, such as CPU usage or memory usage. For example,top -o cpu
will sort the processes by CPU usage.-s
: specify the delay between updates. For example,top -s 2
will update the display every 2 seconds.-u
: show the process for a particular user. For example,top -u username
will show the processes for the user with the specified username.
You can use these options in combination to customize the output of the top
command. For example, to monitor the CPU usage of the processes owned by a particular user, you can use the following command:
top -o cpu -s 2 -u username
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List of Freely available programming books - What is the single most influential book every Programmers should read
- Bjarne Stroustrup - The C++ Programming Language
- Brian W. Kernighan, Rob Pike - The Practice of Programming
- Donald Knuth - The Art of Computer Programming
- Ellen Ullman - Close to the Machine
- Ellis Horowitz - Fundamentals of Computer Algorithms
- Eric Raymond - The Art of Unix Programming
- Gerald M. Weinberg - The Psychology of Computer Programming
- James Gosling - The Java Programming Language
- Joel Spolsky - The Best Software Writing I
- Keith Curtis - After the Software Wars
- Richard M. Stallman - Free Software, Free Society
- Richard P. Gabriel - Patterns of Software
- Richard P. Gabriel - Innovation Happens Elsewhere
- Code Complete (2nd edition) by Steve McConnell
- The Pragmatic Programmer
- Structure and Interpretation of Computer Programs
- The C Programming Language by Kernighan and Ritchie
- Introduction to Algorithms by Cormen, Leiserson, Rivest & Stein
- Design Patterns by the Gang of Four
- Refactoring: Improving the Design of Existing Code
- The Mythical Man Month
- The Art of Computer Programming by Donald Knuth
- Compilers: Principles, Techniques and Tools by Alfred V. Aho, Ravi Sethi and Jeffrey D. Ullman
- Gödel, Escher, Bach by Douglas Hofstadter
- Clean Code: A Handbook of Agile Software Craftsmanship by Robert C. Martin
- Effective C++
- More Effective C++
- CODE by Charles Petzold
- Programming Pearls by Jon Bentley
- Working Effectively with Legacy Code by Michael C. Feathers
- Peopleware by Demarco and Lister
- Coders at Work by Peter Seibel
- Surely You're Joking, Mr. Feynman!
- Effective Java 2nd edition
- Patterns of Enterprise Application Architecture by Martin Fowler
- The Little Schemer
- The Seasoned Schemer
- Why's (Poignant) Guide to Ruby
- The Inmates Are Running The Asylum: Why High Tech Products Drive Us Crazy and How to Restore the Sanity
- The Art of Unix Programming
- Test-Driven Development: By Example by Kent Beck
- Practices of an Agile Developer
- Don't Make Me Think
- Agile Software Development, Principles, Patterns, and Practices by Robert C. Martin
- Domain Driven Designs by Eric Evans
- The Design of Everyday Things by Donald Norman
- Modern C++ Design by Andrei Alexandrescu
- Best Software Writing I by Joel Spolsky
- The Practice of Programming by Kernighan and Pike
- Pragmatic Thinking and Learning: Refactor Your Wetware by Andy Hunt
- Software Estimation: Demystifying the Black Art by Steve McConnel
- The Passionate Programmer (My Job Went To India) by Chad Fowler
- Hackers: Heroes of the Computer Revolution
- Algorithms + Data Structures = Programs
- Writing Solid Code
- JavaScript - The Good Parts
- Getting Real by 37 Signals
- Foundations of Programming by Karl Seguin
- Computer Graphics: Principles and Practice in C (2nd Edition)
- Thinking in Java by Bruce Eckel
- The Elements of Computing Systems
- Refactoring to Patterns by Joshua Kerievsky
- Modern Operating Systems by Andrew S. Tanenbaum
- The Annotated Turing
- Things That Make Us Smart by Donald Norman
- The Timeless Way of Building by Christopher Alexander
- The Deadline: A Novel About Project Management by Tom DeMarco
- The C++ Programming Language (3rd edition) by Stroustrup
- Patterns of Enterprise Application Architecture
- Computer Systems - A Programmer's Perspective
- Agile Principles, Patterns, and Practices in C# by Robert C. Martin
- Growing Object-Oriented Software, Guided by Tests
- Framework Design Guidelines by Brad Abrams
- Object Thinking by Dr. David West
- Advanced Programming in the UNIX Environment by W. Richard Stevens
- Hackers and Painters: Big Ideas from the Computer Age
- The Soul of a New Machine by Tracy Kidder
- CLR via C# by Jeffrey Richter
- The Timeless Way of Building by Christopher Alexander
- Design Patterns in C# by Steve Metsker
- Alice in Wonderland by Lewis Carol
- Zen and the Art of Motorcycle Maintenance by Robert M. Pirsig
- About Face - The Essentials of Interaction Design
- Here Comes Everybody: The Power of Organizing Without Organizations by Clay Shirky
- The Tao of Programming
- Computational Beauty of Nature
- Writing Solid Code by Steve Maguire
- Philip and Alex's Guide to Web Publishing
- Object-Oriented Analysis and Design with Applications by Grady Booch
- Effective Java by Joshua Bloch
- Computability by N. J. Cutland
- Masterminds of Programming
- The Tao Te Ching
- The Productive Programmer
- The Art of Deception by Kevin Mitnick
- The Career Programmer: Guerilla Tactics for an Imperfect World by Christopher Duncan
- Paradigms of Artificial Intelligence Programming: Case studies in Common Lisp
- Masters of Doom
- Pragmatic Unit Testing in C# with NUnit by Andy Hunt and Dave Thomas with Matt Hargett
- How To Solve It by George Polya
- The Alchemist by Paulo Coelho
- Smalltalk-80: The Language and its Implementation
- Writing Secure Code (2nd Edition) by Michael Howard
- Introduction to Functional Programming by Philip Wadler and Richard Bird
- No Bugs! by David Thielen
- Rework by Jason Freid and DHH
- JUnit in Action
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Health Health, a science-based community to discuss human health
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Today I Learned (TIL) You learn something new every day; what did you learn today? Submit interesting and specific facts about something that you just found out here.
- TIL that Nazi general Erwin Rommel was allowed to take cyanide after being implicated in a plot to kill Hitler. To maintain morale, the Nazis gave him a state funeral and falsely claimed he died from war injuries.by /u/mvincen95 on February 13, 2025 at 3:33 pm
submitted by /u/mvincen95 [link] [comments]
- TIL about Richard Sakakida, an American spy operating in the Philippines before the attack on Pearl Harbor, who spied on the Japanese community in Manila before he was captured after the fall of Corregidor. During his capture, he was tortured and eventually led a jailbreak of about 500 prisoners.by /u/fireatjaps2 on February 13, 2025 at 3:32 pm
submitted by /u/fireatjaps2 [link] [comments]
- TIL the founder of North Face, Douglas Tompkins, was killed in 2015 in a kayaking accident while traveling with long time friend Patagonia founder Yvon Chouinard, in Patagonia, Chile.by /u/mvincen95 on February 13, 2025 at 3:25 pm
submitted by /u/mvincen95 [link] [comments]
- TIL that GameBoy and GameBoy Color cartridges have a watch battery inside of them to power the chip for savefiles.by /u/Dorsai_Erynus on February 13, 2025 at 2:30 pm
submitted by /u/Dorsai_Erynus [link] [comments]
- TIL about the All-American Basketball Alliance, a white-only basketball league proposed in 2010 by boxing promoter Don Lewis. After being decried by mayors and colleges in the cities where teams were proposed, as well as by national media figures, the idea was abandoned.by /u/a3poify on February 13, 2025 at 1:46 pm
submitted by /u/a3poify [link] [comments]
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- Stress of Eviction or Housing Loss Linked to Child Mental Health Issues, Study Findsby /u/EffectiveAffect on February 13, 2025 at 3:44 pm
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- Researchers have successfully grown bioengineered teeth in pigs using a combination of human and pig cells | While the science is still in its early stages, the findings could one day lead to a future where you could have your missing teeth replaced with biological dentition.by /u/chrisdh79 on February 13, 2025 at 1:30 pm
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- Blood test paves the way for better heart attack preventionby /u/uniofreading on February 13, 2025 at 11:19 am
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Reddit Sports Sports News and Highlights from the NFL, NBA, NHL, MLB, MLS, and leagues around the world.
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submitted by /u/ModenaR [link] [comments]
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- Up to 3 years in prison for attempt to blackmail Michael Schumacher’s family for $15.6M following convictionsby /u/Oldtimer_2 on February 13, 2025 at 2:06 pm
submitted by /u/Oldtimer_2 [link] [comments]
- TIL that sports analyst, Stephen A. Smith, has a recurring role as “Brick” on the daytime soap opera, General Hospital, playing a surveillance expert for a mob kingpin.by /u/Major-Tuddy on February 13, 2025 at 1:20 pm
submitted by /u/Major-Tuddy [link] [comments]