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Use -ok instead of -exec with find for safe rm operations
Use -ok instead of -exec with find for safe rm operations

247 views

Disabling an Opt-in Region doesn't delete anything, and billing continues
Disabling an Opt-in Region doesn't delete anything, and billing continues

256 views

Why Nat Gateway is your only option without VPC Endpoint, and what it costs you
Why Nat Gateway is your only option without VPC Endpoint, and what it costs you

263 views

Meaning of plus and minus signs with minus mtime in the find command
Meaning of plus and minus signs with minus mtime in the find command

380 views

If your application is on only one zone, what happens if the zone goes down?
If your application is on only one zone, what happens if the zone goes down?

443 views

AWS Gateway Endpoints: Only for S3 and DynamoDB, and completely free
AWS Gateway Endpoints: Only for S3 and DynamoDB, and completely free

362 views

Why the Linux find command searches in real-time unlike locate
Why the Linux find command searches in real-time unlike locate

843 views

Why Session Manager doesn't need a key pair or an open port 22
Why Session Manager doesn't need a key pair or an open port 22

336 views

Hardware in your building, but not yours: AWS installs, patches, and replaces it
Hardware in your building, but not yours: AWS installs, patches, and replaces it

340 views

Why there is no single ephemeral port range to memorize: The practical solution 1024 to 65535
Why there is no single ephemeral port range to memorize: The practical solution 1024 to 65535

478 views

When to use rm -rf to delete a directory in the RHCSA exam
When to use rm -rf to delete a directory in the RHCSA exam

508 views

VMware Question on AWS in the Exam: The Answer is VMware Cloud on AWS, Not Amazon EVS
VMware Question on AWS in the Exam: The Answer is VMware Cloud on AWS, Not Amazon EVS

258 views

Why one security group cannot block another
Why one security group cannot block another

429 views

How to search your history quickly using Control+R instead of history and grep
How to search your history quickly using Control+R instead of history and grep

367 views

What happens when the Outpost service link goes down: the data plane keeps running, the control p...
What happens when the Outpost service link goes down: the data plane keeps running, the control p...

288 views

Why custom Network ACLs block all traffic as soon as you associate them with a subnet
Why custom Network ACLs block all traffic as soon as you associate them with a subnet

218 views

Why !rm is dangerous in Bash and how to verify the command with :p before executing it
Why !rm is dangerous in Bash and how to verify the command with :p before executing it

365 views

Why Stateless is Essential for Horizontal Scaling: Scale-in Can Wipe Out Shopping Carts
Why Stateless is Essential for Horizontal Scaling: Scale-in Can Wipe Out Shopping Carts

437 views

Why Network ACL blocks responses even after opening inbound and outbound port 80
Why Network ACL blocks responses even after opening inbound and outbound port 80

258 views

Why are alias and HISTSIZE changes erased when you close the terminal in RHCSA?
Why are alias and HISTSIZE changes erased when you close the terminal in RHCSA?

203 views

Elasticity in SAA-C03: Why the answer without an Auto Scaling Group might be the correct one
Elasticity in SAA-C03: Why the answer without an Auto Scaling Group might be the correct one

104 views

Why a Security Group only needs one inbound rule
Why a Security Group only needs one inbound rule

155 views

How to discover that ls is an alias using type
How to discover that ls is an alias using type

270 views

Why Vertical Scaling on EC2 Means Downtime and Hard Limits
Why Vertical Scaling on EC2 Means Downtime and Hard Limits

47 views

Why NACL cuts off the connection even if the Security Group is open
Why NACL cuts off the connection even if the Security Group is open

75 views

Why is $name evaluated in double quotes but not in single quotes in shell?
Why is $name evaluated in double quotes but not in single quotes in shell?

324 views

Elasticity means scaling up and down: The second half is what saves you money
Elasticity means scaling up and down: The second half is what saves you money

138 views

How to Allow Only App Servers to Access Your Database: Using Security Groups as a Source
How to Allow Only App Servers to Access Your Database: Using Security Groups as a Source

586 views

The difference between local variables and environment variables in Linux shell
The difference between local variables and environment variables in Linux shell

179 views

Scale up isn't always vertical: How to tell the difference from scale out
Scale up isn't always vertical: How to tell the difference from scale out

86 views

Why You Shouldn't Expose SSH Port 22 to the Public Internet
Why You Shouldn't Expose SSH Port 22 to the Public Internet

428 views

Why does the exported variable disappear when you close the terminal?
Why does the exported variable disappear when you close the terminal?

1,500 views

A design that works but wastes money isn't a good design
A design that works but wastes money isn't a good design

297 views

Why a security group doesn't need an outbound rule for the server to respond
Why a security group doesn't need an outbound rule for the server to respond

235 views

The AWS Solutions Architect Associate exam tests judgment, not memorization
The AWS Solutions Architect Associate exam tests judgment, not memorization

367 views

Why does your server give you a timeout instead of an error? It's likely the Security Group
Why does your server give you a timeout instead of an error? It's likely the Security Group

276 views

The AWS Solutions Architect exam isn't about memorization: It tests your ability to design the be...
The AWS Solutions Architect exam isn't about memorization: It tests your ability to design the be...

373 views

Why is enable dns hostnames false by default in a custom VPC?
Why is enable dns hostnames false by default in a custom VPC?

1,200 views

Why can't you change a subnet's IPv4 range after creating it? And why IPv6 is the exception
Why can't you change a subnet's IPv4 range after creating it? And why IPv6 is the exception

216 views

Why the most specific route wins in the route table
Why the most specific route wins in the route table

402 views

AWS SAA C03 Arabic Launch
AWS SAA C03 Arabic Launch

508 views

The docker pull command
The docker pull command

373 views

Understanding Linux File Permissions Using Numbers
Understanding Linux File Permissions Using Numbers

346 views

How to Effortlessly Memorize Linux Permissions Numbers
How to Effortlessly Memorize Linux Permissions Numbers

1,200 views

How Linux Handles User Permissions
How Linux Handles User Permissions

349 views

The Role of systemd in Modern Linux
The Role of systemd in Modern Linux

556 views

How to write a visudo line
How to write a visudo line

598 views

How to understand the /etc/sudoers file
How to understand the /etc/sudoers file

1,000 views

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