bash - Sysadmins of the North

Monit monitoring on Ubuntu 14.04 VM on Hyper-V

In this post you'll learn about setting up a Monit monitoring service for your websites and services. Monit is a free and open source service monitoring application which can perform various event-based actions. Monit can send email notifications, restart a service or application, or take other responsive actions. We set Monit up on a Ubuntu 14.04 VM, built on Hyper-V. And we use Monit to monitor several websites, and send out notifications on downtime.

Published on Sunday, 15 February 2015

How to restore a deleted Open-Xchange context?

How to restore, or recover, an accidentally deleted OX context. If you've accidentally deleted an Open-Xchange context (contextid), then that is bad... Here is how to recover a deleted OX context and filestore... Assuming you make backups of course.

Published on Wednesday, 21 January 2015

Convert decimal to hex in Bash?

A quicky for my archives, learn how to convert decimal to hex and hexadecimal to decimal, in Bash...

Published on Thursday, 6 November 2014

How to delete all MAILER-DAEMON emails in Postfix queue

How to delete all MAILER-DAEMON emails from your Postfix queue, when it matches a sender or recipient email address condition. In Postfix, there are various similar commands to delete messages from the Postfix mail queue, based on the Message-ID and/or email address for example...

Published on Wednesday, 4 June 2014

Minify JavaScript, CSS and compress images

Optimizing, minify and compressing JavaScript and CSS files, the easy and fast way? With YUI Compressor on the Windows-, Linux- and macOS command line of course! Compacting HTML, CSS, and JavaScript can speeds up your website because of smaller and faster downloads, parsing, and execution time.

Published on Sunday, 18 May 2014

Ssh shorthand name for hostnames

How to use shorthand names for hostnames with ssh? You don't always want to type in a complete host name when using ssh to remote hosts. Here is how to configure and use shorthand hostnames with ssh.

Published on Thursday, 13 March 2014

Bash: Grep through a large number of files - "Argument list too long"

/bash/grep and /bash/rm give me an error Argument list too long. Here is how to overcome this grep error.

Published on Tuesday, 17 September 2013

Check IP address blacklist status in Bash

Here is a Linux Bash shell script to check whether an IP address is listed in a DNSBL blacklist, or RBL. Using this script in Bash you can quickly test if an IP address is blacklisted.

Published on Friday, 14 October 2011

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