One of the difficulties in setting up a new mail server is ensuring IP address reputation. Sometimes, I need a bunch of IP address to be setting up as SMTP gateway and due to its poor reputation history, our mails ended on spam or junk folder on the destination account. Building a reputable public IP…
I got this warning message while building Docker images and trying to start rsyslog inside Docker : rsyslogd: imklog: cannot open kernel log (/proc/kmsg): Operation not permitted. rsyslogd: activation of module imklog failed It seems that Unpriviledged cotainers do not have access to kernel log for security reasons. Despite this warning messages, rsyslog running as…
As I lives in Indonesia, I would prefer to use GMT+7 as my selected timezone. It will make my log easier to check and also easier to find events at a certain time. Below are a sample command to set timezone on Ubuntu based docker images : ################################################################# # Dockerfile for Excellent Ubuntu Standard #…
Single line script for creating crontab entry : (crontab -l 2>/dev/null; echo “*/15 * * * * /path/to/script.sh 2>&1”) | crontab – Ref : https://stackoverflow.com/questions/4880290/how-do-i-create-a-crontab-through-a-script
I got an error message while building my new docker images to set default setting on Postfix configuration : debconf: unable to initialize frontend: Dialog debconf: (Dialog frontend will not work on a dumb terminal, an emacs shell buffer, or without a controlling terminal.) debconf: falling back to frontend: Readline The problem itself didn’t stop…