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Find Directory Sizes in a Folder

October 16, 2019 mike Sysadmin

Finding the recursive sizes of folders and their contents in summary is easy with the disk usage (du) command. Output will look something like this.

datacenter

Port Scan the Entire Internet in 5 Minutes?

January 19, 2017 mike Sysadmin

One of my favorite sub-reddits is /r/coolgithubprojects. I check it out a few times a week looking for interesting open source projects. One interesting project

netstat sort example

Using netstat to Monitor Connections and DDoS on Your Server

January 14, 2017 mike Sysadmin

Netstat is a wonderful Linux command to peak into networking processes on your server. Combined with other commands such as sort netstat can become extremely

memory

How To Setup a Swap Partition in Ubuntu on EC2

January 6, 2017 mike Sysadmin

Many cloud servers don’t come with a swap partition setup by default, including Amazon EC2 servers. Luckily it’s fairly simple to setup. Below were using

How to Check Ubuntu Kernel Version with uname

December 13, 2016 mike Sysadmin

The uname shell command will print out in any Debian or RedHat variant like Ubuntu and Centos Linux much of the main system information, here

How to View Processes and Their Respective Ports on Linux and OSX

December 11, 2016 mike Sysadmin

If you want to see what processes are listening on what ports these you can use the linux command lsof and netstat. Below are a

How to Watch For a Process to End on Ubuntu Linux

December 9, 2016 mike Sysadmin

I wanted to send myself a text when a long running process was done so I needed a command that would watch for a process

nested zip extract

How to Recursively Extract All Nested Zip Files in Linux

December 2, 2016 mike Sysadmin

I needed to recursively unzip a big mess of nested zip files. This shell command does the trick, it also preserves the directory structure.

how-to-setup-password-less-loggin-with-ssh-keys

How to Setup Password-less Loggin with SSH Keys

November 28, 2016 mike Sysadmin

Having to type in passwords manually all day long into servers you manage is a pain. You should be using ssh keys, they’re more secure,

Quickly Create 100 Thousand Random Files In a Folder Linux

November 18, 2016 mike Sysadmin

This command very quickly creates 100k randomly sized binary files in the directory you run it in. Took 6 minutes 37 seconds to run on

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