Linux + DevOps Blogs

Configure Additional IP Address in Rocky Linux

Configure Additional IP Address 1. Check the NetworkManager connection nmcli connection show Output: NAME UUID ...

Rocky Linux OS Upgrade 1. Check the current OS version cat /etc/os-release 2. Update and upgrade the system sudo dnf clean all sudo dnf upda...

Run the following commands in Windows CMD 1. Check WSL status wsl --status 2. Install Ubuntu using WSL wsl --install -d Ubuntu 3. List all i...

Install GeoIp command dnf install https://rpms.remirepo.net/enterprise/remi-release-9.rpm dnf install dnf-utils dnf install GeoIP

dnf install -y epel-release or, dnf install certbot sudo su - zimbra -c "zmproxyctl stop" sudo su - zimbra -c "zmmailboxdctl ...

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

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

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

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

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

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 Jenkins & web server On Jenkins Server Generate SSH Key: Generate an SSH key pair....

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 #!/bin/bash #cat script.sh while true; do # Your script commands go here ...

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