NGINX redirect for non whitelisted IPs

fixing an infinity loop issue

map $remote_addr $notwhitelisted_ip {

  default   1;

# VPN

  1.2.3.4   0;

}

server {

    ...

   

    set $maintenance_redirect 0;

    if ($notwhitelisted_ip = 1) {

      set $maintenance_redirect 1;

    }

    if ($request_uri = "/maintenance-vik.html") {

      set $maintenance_redirect 0;

    }

    if ($maintenance_redirect = 1) {

      return 301 /maintenance-vik.html;      

    } 

    ...

Bash check process status and restarting

 #!/bin/bash

PROCESS_NAME="queue:consumers:start specificName"

START_COMMAND="/usr/bin/php8.2 /var/www/project/html/bin/magento queue:consumers:start specificName --single-thread --max-messages=20000"

pgrep -f "$PROCESS_NAME" > /dev/null

PGREP_STATUS=$?

# 0 - found, 1 - not found

if [ $PGREP_STATUS -ne 0 ]; then

    echo "$(date '+%Y-%m-%d %H:%M:%S') - The process $PROCESS_NAME wasn't found, restarting..."

    $START_COMMAND &

    pgrep -af "PROCESS_NAME"

fi

Siege with Basic Http Auth

 https://gist.github.com/rob-murray/dd77778b1770f32c46e8

# Basic auth;

auth=$(echo -n 'username:password' | openssl base64)

siege -t60s -c20 -d10 --header="Authorization:Basic $auth" 'https://staging.a-hostname.co.uk/'

siege -f sitemap.txt -c100 -t15m -d7 -iv --no-parser --header="Authorization:Basic $auth" -m "Project siege Sep 26 2024" -l  

550 5.7.64 TenantAttribution; Relay Access Denied [No TLS]

 Troubleshooting:

1) create/enable 'Connector' in 'Exchange'

Show all > Exchange > EAC (Exchange Administrative Control) > Mail flow > Connectors

2) check into created connector if enabled an option like 'keep Exchange headers'

Linux Rsync with particular extension

 rsync -zarv --prune-empty-dirs --include "*/"  --include="*.gif" --exclude="*" ./ ../gifs/

Linux Bash rsync remote to remote with forwarding keys

We need it for loading files directly from one remote server to another one where we have SSH access.

SSH access from a Workstation -> Server1 -> rsync loading files -> Server2

ssh -v username@server1

find an identity SSH key for sure

ssh-add <the_key>

ssh -A username@server1

run with A option for allowing forwarding keys 

rsync -azP --exclude '.4y8-folder' --exclude 'file.tar.gz' pub/media/ username@server2:pub/media/

Linux Bash remove old files more than 10 if exists

if [ $(expr $(ls -1 /test/111 | wc -l | tr -d ' ')) -gt 10 ]; then rm $(ls -d -1 -At /test/111/* | tail -n $(expr $(ls -1 /test/111 | wc -l | tr -d ' ') - 10)) ; fi 

to crontab

/bin/bash -c "if [ $(expr $(ls -1 /test/111 | wc -l | tr -d ' ')) -gt 10 ]; then rm $(ls -d -1 -At /test/111/* | tail -n $(expr $(ls -1 /test/111 | wc -l | tr -d ' ') - 10)) ; fi"