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March 2, 2022 – 2:00 pm

Books have been written on the subject of awk and sed. Here’s a small sample of commands I put together over the years that are useful for everyday system administration tasks. Most of these tasks …

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Article Archive for May 2015

Detecting Synology NAS with nmap

May 29, 2015 – 3:07 pm
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Just a quick note for myself on how to find Synology NAS servers on the network without having to use the bulky Windows utility that ships with these systems.

Dealing With Prolific Emailers

May 26, 2015 – 2:39 pm
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So you come back from vacation, open Outlook and see thousands of unread emails. Who sends all this stuff? There’s an easy way to identify the sources of this background noise. In Outlook’s inbox, select …

Regex Collection

May 14, 2015 – 12:29 pm
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Just a small collection of POSIX regular expressions that may come in handy for writing sysadmin scripts.

BASH History Control

May 12, 2015 – 12:01 pm
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The standard output of the “history” command will show you the last one thousand commands executed by the user. This is useful, of course, but there are a few issues. Sometimes it’s important to know …

Verify Email SSL Certificate from CLI

May 8, 2015 – 10:36 am
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Just a quick reference for validating SSL certs on mail servers. This is not something I have to do often, but when the need arises, I find myself googling the answer every single time. So …

Extending Swap on LVM2 Logical Volume

May 7, 2015 – 11:16 am
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To grow swap on LVM you will need to temporarily disable the swap LV. This will leave without swap space, which may upset some applications (Oracle). So the first step should be to set up …

Faking the Uptime in Linux

May 4, 2015 – 10:05 pm
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If, for whatever reason, you need to fake the Linux server uptime, there is a hacked kernel module you can use. The instructions are below.

Resetting HP ILO from OS

May 4, 2015 – 11:02 am
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You can use ipmitool package in Linux to reset your HP server’s ILO password. The basic instructions are below.