How To Allow IAM Users AWS CDN Read/Write Access For W3 Total Cache

Author: erics, July 28th, 2021

SUMMARY: Needed to create an AWS IAM Policy to allow a user access to two buckets and their associated CDN’s in WordPress W3 Total Cache

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "VisualEditor0",
            "Effect": "Allow",
            "Action": "s3:ListBucket",
            "Resource": "arn:aws:s3:::wyzaerd-demo-prod"
        },
        {
            "Sid": "VisualEditor1",
            "Effect": "Allow",
            "Action": [
                "s3:PutObject",
                "s3:GetObject",
                "s3:DeleteObject",
                "s3:PutObjectAcl"
            ],
            "Resource": "arn:aws:s3:::wyzaerd-demo-prod/*"
        },
        {
            "Sid": "VisualEditor2",
            "Effect": "Allow",
            "Action": "s3:ListBucket",
            "Resource": "arn:aws:s3:::wyzaerd-demo-dev"
        },
        {
            "Sid": "VisualEditor3",
            "Effect": "Allow",
            "Action": [
                "s3:PutObject",
                "s3:GetObject",
                "s3:DeleteObject",
                "s3:PutObjectAcl"
            ],
            "Resource": "arn:aws:s3:::wyzaerd-demo-dev/*"
        },
        {
            "Sid": "VisualEditor4",
            "Effect": "Allow",
            "Action": [
                "s3:ListAllMyBuckets",
                "cloudfront:ListDistributions"
            ],
            "Resource": "*"
        }
    ]
}

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{

"Version": "2012-10-17",

"Statement": [

{

"Sid": "VisualEditor0",

"Effect": "Allow",

"Action": "s3:ListBucket",

"Resource": "arn:aws:s3:::wyzaerd-demo-prod"

},

{

"Sid": "VisualEditor1",

"Effect": "Allow",

"Action": [

"s3:PutObject",

"s3:GetObject",

"s3:DeleteObject",

"s3:PutObjectAcl"

],

"Resource": "arn:aws:s3:::wyzaerd-demo-prod/*"

},

{

"Sid": "VisualEditor2",

"Effect": "Allow",

"Action": "s3:ListBucket",

"Resource": "arn:aws:s3:::wyzaerd-demo-dev"

},

{

"Sid": "VisualEditor3",

"Effect": "Allow",

"Action": [

"s3:PutObject",

"s3:GetObject",

"s3:DeleteObject",

"s3:PutObjectAcl"

],

"Resource": "arn:aws:s3:::wyzaerd-demo-dev/*"

},

{

"Sid": "VisualEditor4",

"Effect": "Allow",

"Action": [

"s3:ListAllMyBuckets",

"cloudfront:ListDistributions"

],

"Resource": "*"

}

]

}

Categories: How-To's, Technology Tags: Amazon, AWS, Bucket, CDN, CloudFront, howto, IAM, JSON, Policy, S3, tips, User, W3 Total Cache | No comments

How To Disable VIM Mouse Automatic Visual Mode

Author: erics, July 27th, 2021

Current Session:

:set mouse-=a

1	:set mouse-=a

All Sessions: Add the following to your ~/.vimrc file:

set mouse-=a

1	set mouse-=a

Categories: How-To's, Technology Tags: Automatic, Disable, Disable Visual, howto, Mouse, tips, vi, vim, Visual, Visual Mode | No comments

How To Count Lines In A String Variable Using Perl

Author: erics, July 20th, 2021

my $count = () = $string =~ /\n/g;

1	my $count = () = $string =~ /\n/g;

Categories: How-To's, Technology Tags: Count, howto, Newline, perl, String, tips, Var, Variable | No comments

How To Fix Email Service Unavailable Delivery Issues with IPv6 on Amazon Linux

Author: erics, July 16th, 2021

PROBLEM: Email delivery to Google was failing with a “Service Unavailable” error:

relay=aspmx.l.google.com. [IPv6:2607:f8b0:400d:c0c::1a], dsn=5.0.0, stat=Service unavailable

1	relay=aspmx.l.google.com. [IPv6:2607:f8b0:400d:c0c::1a], dsn=5.0.0, stat=Service unavailable

Note that the network address for the destination is shown as IPv6! That is the root cause of the issue: 1. Sendmail is sending mail from the IPv6 address instead of the IPv4 address 2. Google rejects IPv6 senders without proper reverse […]

Categories: How-To's, Technology Tags: Amazon, Amazzon Linux, AWS, Delivery, DSN, Email, howto, IPv4, IPv6, Linux, make, Restart, SendMail, sendmail.cf, sendmail.mc, service, Service Unavailable, SPF, tips, Unavailable | No comments

How To Preserve Line Breaks When Storing Command Output To A Shell Variable

Author: erics, July 14th, 2021

Solution: “Double Quote” your variables!

shell> myvar="abc
def
ghi"

shell> echo $myvar
abc def ghi

shell> echo "$myvar"
abc
def
ghi

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shell> myvar="abc

def

ghi"

shell> echo $myvar

abc def ghi

shell> echo "$myvar"

abc

def

ghi

See Also: https://stackoverflow.com/questions/22101778/how-to-preserve-line-breaks-when-storing-command-output-to-a-variable

Categories: How-To's, Technology Tags: Capture, Command, Command Output, howto, Keep, line break, Line Breaks, Preserve, Store, Storing, tips, Variable | No comments

How To Fix Stuck WordPress Maintenance Mode

Author: erics, July 8th, 2021

ERROR: Briefly Unavailable for Scheduled Maintenance. Check Back in a Minute CAUSE: WordPress did not complete an action SOLUTION: Either – remove ~/wordpress/.maintenance – edit ~/wordpress/wp-activate.php and set define( ‘WP_INSTALLING’, false );

Categories: How-To's, Technology Tags: howto, Hung, Maintenance, Stuck, tips, WordPress, WP_INSTALLING | No comments

How To Change Your GIT Name and Email Address Globally and Per Repository

Author: erics, June 17th, 2021

To update your git user name and email address for all repos:

git config --global user.name "Your Name"
git config --global user.email "yourName@theDomain.com"

1 2	git config --global user.name "Your Name" git config --global user.email "yourName@theDomain.com"

To update your git user name and email address for a specific repo:

cd repo
git config user.name "Your Name"
git config user.email "yourName@theDomain.com"

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cd repo

git config user.name "Your Name"

git config user.email "yourName@theDomain.com"

Categories: How-To's, Technology Tags: Change, Email, git, Global, howto, local, name, Repo, repository, tips, user.email, user.name | No comments

How To Count Strings Inside Another In Perl

Author: erics, June 16th, 2021

my $needle = 'foo';
my $haystack = 'foo foo foo';
my @count = $haystack =~ /$needle/g;
my $count = scalar @count;
print "$count\n";

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my $needle = 'foo';

my $haystack = 'foo foo foo';

my @count = $haystack =~ /$needle/g;

my $count = scalar @count;

print "$count\n";

Should result in 3

Categories: How-To's, Technology Tags: Count, HayStack, howto, Needle, perl, Scalar, String, tips | No comments

How To Convert from AWS Instance Family t2 to t3 with Enhanced Networking on Amazon Linux 1

Author: erics, June 10th, 2021

I wanted to change instance type from t2 to t3, but got an error when i went to start the instance:

An error occurred (InvalidParameterCombination) when calling the StartInstances operation:
Enhanced networking with the Elastic Network Adapter (ENA) is required for the 't3.large' instance type. Ensure that your instance 'i-04ae4c6f7bfa96e51' is enabled for ENA.

1 2	An error occurred (InvalidParameterCombination) when calling the StartInstances operation: Enhanced networking with the Elastic Network Adapter (ENA) is required for the 't3.large' instance type. Ensure that your instance 'i-04ae4c6f7bfa96e51' is enabled for ENA.

I found this AWS docs page: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/enhanced-networking-ena.html Below are the steps I need to follow on AWS Linux 1. Summary Steps Pre-flight tests on t2 modinfo ena -> see “ERROR: modinfo: could not […]

Categories: How-To's, Technology Tags: AWS, AWS Linux, AWS Linux 1, Family, howto, Instance, Instance Family, Instance Type, Linux, t2, t3, tips, Type | No comments

How To Undo A Conflicting Merge in GIT

Author: erics, June 8th, 2021

shell> git merge branch-with-messy-changes

Auto-merging myCode.pm
CONFLICT (content): Merge conflict in myCode.pm
Automatic merge failed; fix conflicts and then commit the result.

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Auto-merging myCode.pm

CONFLICT (content): Merge conflict in myCode.pm

Automatic merge failed; fix conflicts and then commit the result.

shell> git status

On branch eric-merge
Your branch is up to date with 'origin/eric-merge'.

You have unmerged paths.
  (fix conflicts and run "git commit")
  (use "git merge --abort" to abort the merge)

Changes to be committed:

Unmerged paths:
  (use "git add <file>..." to mark resolution)

	both modified:   myCode.pm

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On branch eric-merge

Your branch is up to date with 'origin/eric-merge'.

You have unmerged paths.

(fix conflicts and run "git commit")

(use "git merge --abort" to abort the merge)

Changes to be committed:

Unmerged paths:

(use "git add <file>..." to mark resolution)

both modified: myCode.pm

shell> git merge --abort
shell> git status

1 2	shell> git merge --abort shell> git status

On branch eric-merge
Your branch is up to date with 'origin/eric-merge'.

nothing to commit, working tree clean

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On branch eric-merge

Your branch is up to date with 'origin/eric-merge'.

nothing to commit, working tree clean

IMPORTANT NOTE: Previous versions of git used different commands for this operation: Latest version: git merge –abort Older than version 1.7.4: git reset –merge Older than version 1.6.2: git reset –hard

Categories: How-To's, Technology Tags: abort, conflict, git, howto, Merge, Revert, tips, Undo | No comments

How To Allow IAM Users AWS CDN Read/Write Access For W3 Total Cache

How To Disable VIM Mouse Automatic Visual Mode

How To Count Lines In A String Variable Using Perl

How To Fix Email Service Unavailable Delivery Issues with IPv6 on Amazon Linux

How To Preserve Line Breaks When Storing Command Output To A Shell Variable

How To Fix Stuck WordPress Maintenance Mode

How To Change Your GIT Name and Email Address Globally and Per Repository

How To Count Strings Inside Another In Perl

How To Convert from AWS Instance Family t2 to t3 with Enhanced Networking on Amazon Linux 1

How To Undo A Conflicting Merge in GIT

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