Author:
erics, Posted on Tuesday, December 7th, 2021 at 12:05:44pm
I needed to block email based on the Subject header.
The solution is simple:
Edit main.cf as root and uncomment or add:
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header_checks = regexp:/etc/postfix/header_checks |
Next, creaate or edit /etc/postfix/header_checks as root and add the following line:
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/bad subject text here/ REJECT header_checks NO SPAM ALLOWED /test subject text here/ DISCARD header_checks NO SPAM ALLOWED |
Finally, run sudo postfix reload
NOTE: Do NOT add the “i” after the regular expression! It is case-insensitive by default, and adding the “i” will break it!
Categories: How-To's, Technology Tags: Block, Check, Checks, Discard, Header, header_checks, headers, howto, PostFix, Reject, Spam, Subject, tips | 
No comments
Author:
erics, Posted on Thursday, December 2nd, 2021 at 10:59:53am
Use AutoRaise!
From the docs: “When you hover a window it will be raised to the front (with a delay of your choosing) and gets the focus.”
Web page: https://github.com/sbmpost/AutoRaise
Download: https://github.com/sbmpost/AutoRaise/archive/refs/heads/master.zip
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unzip -d ~ ~/Downloads/AutoRaise-master.zip cd ~/AutoRaise-master && make clean && make make install |
Categories: How-To's, Technology Tags: apple, AutoRaise, Delay, Focus, Focus Follows Mouse, Follow, Hover, howto, Mac, MacOS, macosx, Mouse, Raise, tips, window | No comments
Author:
erics, Posted on Tuesday, November 2nd, 2021 at 2:00:09pm
I needed a way to get the dock icon to bounce for all incoming emails and there did not seem to be any option to do so.
There is actually a simple way to do it, but it is not intuitive.
The key is to add a new Rule!
- Open Mail.app and choose Mail -> Preferences from the top menu
- Click on the Rules tab
- Click the ‘Add rule’ button
- In the Description field, enter: Bounce Dock Icon for Incoming Mail
- If “ANY” of the following conditions are met, choose “To”, “does not contain”, and then enter “abc123xyz789”
- Under “Perform the following action:” select ‘Bounce Icon in the Dock’, then click OK
This new rule will check every incoming message and wee that is does NOT find “abc123xyz789” in the To: header, and therefore triggers the rule to bounce the Dock icon.
Categories: How-To's, Technology Tags: Add rule, apple, Bounce, Bounce dock icon, Bounce icon, Dock, Email, Email rule, Force, howto, Icon, Incoming, Incoming mail, Mac, MacOS, macosx, mail, Mail rule, Mail.app, new email, New mail, Rule, Rules, tips | No comments
Author:
erics, Posted on Thursday, October 7th, 2021 at 10:36:10am
On Sept 30th 2021 Let’s Encrypts previous root certificate DST Root CA X3 (and it’s R3 intermediate) will expire. It has been replaced by their ISRG Root X1 certificate (and replacement R3 intermediate).
The version of the R3 intermediate signing certificate which chains to DST Root CA X3 expired September 29 19:21:40 2021 GMT.
The DST Root CA X3 root certificate expired September 30 14:01:15 2021 GMT.
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yum update ca-certificates |
Then restart your web server (i.e. Apache and php-fpm) as appropriate.
Categories: Technology Tags: | No comments
Author:
erics, Posted on Wednesday, September 22nd, 2021 at 11:34:04am
vi wp-config.php
Add at the bottom:
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define(‘WP_DEBUG’, true); define(‘WP_DEBUG_LOG’, true); define(‘WP_DEBUG_DISPLAY’, true); ini_set(‘display_errors’, 1); ini_set(‘display_startup_errors’, 1); error_reporting(E_ALL); |
You can also use this URL in later versions:
/wp-login.php?action=entered_recovery_mode
Categories: Technology Tags: | No comments
Author:
erics, Posted on Thursday, September 9th, 2021 at 7:57:25pm
The aws s3 sync command is slow and painful!
I needed a more efficient way to sync to large buckets (prod to dev).
Finally settled on RClone: https://rclone.org/docs/
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cd {extracted zip dir} ./rclone config cat ~/.config/rclone/rclone.conf |
During rclone config I called remote “s3” ;-}
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./rclone sync -v --progress --fast-list --checksum s3:wyzaerd-demo-prod s3:wyzaerd-demo-dev |
Categories: How-To's, Technology Tags: AWS, Bucket, howto, rclone, rsync, S3, s3s3, s3s3mirror, Sync, tips | No comments
Author:
erics, Posted on Wednesday, September 1st, 2021 at 3:50:30pm
There are three commands in Linux to easily get a reverse DNS lookup with:
dig, host and nslookup.
Here are examples of each:
shell> dig -x 3.214.2.238 +short
shell> dig -x 3.214.2.238
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; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.68.rc1.86.amzn1 <<>> -x 3.214.2.238 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19300 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;238.2.214.3.in-addr.arpa. IN PTR ;; ANSWER SECTION: 238.2.214.3.in-addr.arpa. 300 IN PTR ns3.wyzaerd.info. ;; Query time: 8 msec ;; SERVER: 10.0.0.2#53(10.0.0.2) ;; WHEN: Wed Sep 1 19:43:56 2021 ;; MSG SIZE rcvd: 72 |
shell> host 3.214.2.238
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238.2.214.3.in-addr.arpa domain name pointer ns3.wyzaerd.info. |
shell> nslookup 3.214.2.238
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Server: 10.0.0.2 Address: 10.0.0.2#53 Non-authoritative answer: 238.2.214.3.in-addr.arpa name = ns3.wyzaerd.info. |
Categories: How-To's, Technology Tags: cli, Command, Command line, dig, dig -x, DNS, Host, howto, lookup, nslookup, Reverse, Reverse DNS, tips | No comments
Author:
erics, Posted on Thursday, August 12th, 2021 at 10:27:25am
My /etc/rc.local was not loading at boot time.
rc.local is a symlink to /etc/rc.d/rc.local
lrwxrwxrwx 1 root root 13 Jun 22 2020 rc.local -> rc.d/rc.local
I had to execute the following:
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chmod a+x /etc/rc.d/rc.local |
Categories: How-To's, Technology Tags: boot, howto, Init, rc.local, Start, tips | No comments
Author:
erics, Posted on Thursday, August 12th, 2021 at 10:25:05am
vi /etc/postfix/main.cf
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#inet_protocols = all inet_protocols = ipv4 |
service postfix restart
Categories: How-To's, Technology Tags: Email, Error, Gmail, howto, IPv4, IPv6, PostFix, Protocol, tips | No comments
Author:
erics, Posted on Wednesday, August 4th, 2021 at 2:02:08pm
I wanted to use the same SSH keys for multiple AWS regions. As it turns out, AWS simply stores the public key when you download the private key as a .pem file.
The solution is to simply generate the public key locally from the existing .pem, then import the public key using the same name in a different region.
Step 1: Generate public key from existing private key in .pem format:
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ssh-keygen -y -f existing_private_key.pem > $HOME/.ssh/id_rsa_aws.pub |
Step 2: Import the generated public key into AWS:
Login to the AWS Console and navigate to EC2 -> Key Pairs, then choose Actions -> Import Key Pair in the upper-right corner of the page:
Finally, enter the name for the key pair, and either select the file or paste in the generated public key, then click “Import key pair” at the bottom right:
Reference: https://aws.amazon.com/premiumsupport/knowledge-center/ec2-ssh-key-pair-regions/
Categories: How-To's, Technology Tags: Amaon, AWS, Copy Key Pair, howto, key-pair, KeyPair, Linux, ssh-keygen, tips | No comments
