Change Admin email and antivirus notification email in Zimbra

Change Admin email and antivirus notification email zmlocalconfig -e smtp_destination=admin@domain.com zmlocalconfig -e smtp_destination=adm...

postfix mailq command

To check postfix Mail Queue mailq or, postqueue -p To requeue all messages from mailque postqueue -f To requeue a specific messages from mai...

Enforcing a match between FROM address and sasl username Zimbra

 If the exception db is not used zmprov mcf zimbraMtaSmtpdSenderLoginMaps  proxy:ldap:/opt/zimbra/conf/ldap-slm.cf +zimbraMtaSmtpdSenderRest...

Zimbra modify network

 Zimbra modify network zmprov ms mail.example.com zimbraMtaMyNetworks '127.0.0.0/8 10.0.5.10/24' postfix reload

Allow internal domain in zimbra

Allow internal domain zmprov mcf zimbraAmavisOriginatingBypassSA TRUE zmantispamctl restart zmantivirusctl restart zmamavisdctl restart

Install lets encrypt SSL in Nginx Ubuntu 22.04

Update Package Repository sudo apt update Install Certbot package sudo apt-get install python3-certbot-nginx certbot Run command to enable s...

Passwordless authentication between two Linux servers

Passwordless authentication between two Linux servers Jenkins & web server On Jenkins Server Generate SSH Key: Generate an SSH key pair....

Allow Port in firwalld linux

Allow port in Linux firewall  sudo firewall-cmd --permanent --add-port=10050/tcp sudo firewall-cmd --reload Check allowed port and  sudo fir...

run a script every 30 seconds using a cron job in Linux

#  run a script every 30 seconds using a cron job in Linux #!/bin/bash #cat script.sh while true; do # Your script commands go here ...

Generate randam key using base64 encode

 #Generate 32-bye random key head -c 32 /dev/urandom | base64

PHP Fix date & time issue in Ubuntu Apache/nginx server

Go to the php.ini file and fix date.timezone region sudo vim /etc/php/8.2/fpm/php.ini or, sudo vim /etc/php/8.2/apache2/php.ini date.timezon...

Git checkout/push executable shell file

 git add --chmod=+x  script.sh git commit -m "Adding executable shell script file"

Docker access container from root user

 docker exec -it --user root container_name bash

How to redirect www to non-www domain in AWS load balancer

Set AWS ALB rule to redirect www domain to non www  Go to Application Load Balancer  > Select ALB Name   > Listeners and rules,    Cli...

Install letsencrypt SSL certificate in Linux

 Install letsencrypt package in Ubuntu 22.04 Update the local package index sudo apt update Install certbot package for apache sudo apt inst...