Parse Log Files with sed
Published:
When parsing log files sed is not the go-to tool for most techs, but it offers a pretty neat feature: the ability to easily search a log file for a specific date/time range.
Posts by Tags
Bash
Bash Shortcuts
Published:
I tend to spend quite a bit of my time on a command line, so I am always looking for little ways to make my life easier. Because of that, this post will be a bit of a living document that I plan to occasionally update as I discover more handy tricks. This is not a comprehensive list, nor is it intended to be one. These are shortcuts that allow me to have a smoother workflow.
Bind Mounts
Bind Mounts in Linux
Published:
Bind mounts in Linux allow you to mount one part of the file hierarchy somewhere else. I highly recommend using bind mounts in chrooted environment as it can simplify user access control.
FACLs
Backup and Restore Permissions in Linux
Published:
Inevitably every Linux administrator will eventually have to alter permissions and owerships, perhaps even FACLs. But what happens when your changes go awry? The problem is amplified if you were making changes recursively!
FTP
(S)FTP(S) or: How I Learned to Stop Worrying and Love File Transfer
Published:
File transfer is a fundamental concept of the Internet, however there are a plethora of configuration options that often lead to confusion. In this article I am going to discuss installation and configuration of FTP, FTPS, and SFTP as well as how to chroot (i.e. jail) users for these services.
FTPS
(S)FTP(S) or: How I Learned to Stop Worrying and Love File Transfer
Published:
File transfer is a fundamental concept of the Internet, however there are a plethora of configuration options that often lead to confusion. In this article I am going to discuss installation and configuration of FTP, FTPS, and SFTP as well as how to chroot (i.e. jail) users for these services.
Fedora 21
My Adventures with Multiple Monitors on Linux
Published:
Using multiple monitors on my Linux laptop has introduced a couple of unique issues. The largest of which is that the laptop seems to forget my monitor configuration every time I unplug it.
Gnome 3
My Adventures with Multiple Monitors on Linux
Published:
Using multiple monitors on my Linux laptop has introduced a couple of unique issues. The largest of which is that the laptop seems to forget my monitor configuration every time I unplug it.
Headless VMs
Headless VMs with VirtualBox
Published:
VirtualBox offers a neat feature called “Seamless Mode” that allows you to seamlessly integrate windows from the host and guest operating systems. This feature proves to be problematic however if the host is a Windows operating system. The alternative is to run the guest as a headless VM and port forward connections from the host to the guest. This is a lightweight solution and can achieve Windows/Linux harmony (as well as can be expected).
KexAlgorithm
The Anatomy of an SSH Connection
Published:
Over the last couple of days I have become increasingly interested in unraveling the mysteries behind establishing an SSH connection. The process is very intricate and some of the documentation seems scattered, so I decided to write a bit about it in the hopes that someone else may benefit.
Key Exchange
The Anatomy of an SSH Connection
Published:
Over the last couple of days I have become increasingly interested in unraveling the mysteries behind establishing an SSH connection. The process is very intricate and some of the documentation seems scattered, so I decided to write a bit about it in the hopes that someone else may benefit.
Linux
What’s with this?
Published:
The Zen of Python is a well-known document in the Python community. It quite succinctly, and humorously, lays out all of the guiding principles for Python’s design. The Zen of Python is never more than a few keystrokes away; it can be viewed at anytime by running the this module either via the terminal or from the Python interrupter:
SMTP Sender-Dependent SASL Authentication in Postfix
Published:
In a previous article I discussed how to use Mailgun as a relay in Postfix. This works great if you are only sending email from one website on your server, often times however you will have multiple websites sending email on a single server. In these cases, websites NOT belonging to the sender domain will say sent via SENDER_DOMAIN: wes@example.com via necrux.com
My Adventures with Multiple Monitors on Linux
Published:
Using multiple monitors on my Linux laptop has introduced a couple of unique issues. The largest of which is that the laptop seems to forget my monitor configuration every time I unplug it.
Parse Log Files with sed
Published:
When parsing log files sed is not the go-to tool for most techs, but it offers a pretty neat feature: the ability to easily search a log file for a specific date/time range.
Backup and Restore Permissions in Linux
Published:
Inevitably every Linux administrator will eventually have to alter permissions and owerships, perhaps even FACLs. But what happens when your changes go awry? The problem is amplified if you were making changes recursively!
Bind Mounts in Linux
Published:
Bind mounts in Linux allow you to mount one part of the file hierarchy somewhere else. I highly recommend using bind mounts in chrooted environment as it can simplify user access control.
(S)FTP(S) or: How I Learned to Stop Worrying and Love File Transfer
Published:
File transfer is a fundamental concept of the Internet, however there are a plethora of configuration options that often lead to confusion. In this article I am going to discuss installation and configuration of FTP, FTPS, and SFTP as well as how to chroot (i.e. jail) users for these services.
Bash Shortcuts
Published:
I tend to spend quite a bit of my time on a command line, so I am always looking for little ways to make my life easier. Because of that, this post will be a bit of a living document that I plan to occasionally update as I discover more handy tricks. This is not a comprehensive list, nor is it intended to be one. These are shortcuts that allow me to have a smoother workflow.
The Anatomy of an SSH Connection
Published:
Over the last couple of days I have become increasingly interested in unraveling the mysteries behind establishing an SSH connection. The process is very intricate and some of the documentation seems scattered, so I decided to write a bit about it in the hopes that someone else may benefit.
Getting Started with Mailgun
Published:
Mailgun is a developer-centric approach to email. It can be used to simply relay email, but it can do so much more! In this article I am going to discuss basic configuration for using Mailgun as a relay with Postfix and briefly discuss some of the additional features offered by Mailgun.
SSH Match Statements
Published:
An often underused feature of OpenSSH is the Match statement. Match statements work on OpenSSH 4.4+; applicable versions ship with RHEL/CentOS 6+ and Ubuntu 12.04+. The Match directive accepts the following options:
Finding Help in Linux
Published:
Linux is chock-full of documentation, the challenge however is knowing where to find that documentation. One of the first things that every Linux user ought to learn is how to view the manual pages, man <command>, but there is more to know. The man pages are divided into 9 sections:
Mailgun
SMTP Sender-Dependent SASL Authentication in Postfix
Published:
In a previous article I discussed how to use Mailgun as a relay in Postfix. This works great if you are only sending email from one website on your server, often times however you will have multiple websites sending email on a single server. In these cases, websites NOT belonging to the sender domain will say sent via SENDER_DOMAIN: wes@example.com via necrux.com
Getting Started with Mailgun
Published:
Mailgun is a developer-centric approach to email. It can be used to simply relay email, but it can do so much more! In this article I am going to discuss basic configuration for using Mailgun as a relay with Postfix and briefly discuss some of the additional features offered by Mailgun.
Man Pages
Finding Help in Linux
Published:
Linux is chock-full of documentation, the challenge however is knowing where to find that documentation. One of the first things that every Linux user ought to learn is how to view the manual pages, man <command>, but there is more to know. The man pages are divided into 9 sections:
Match Statements
SSH Match Statements
Published:
An often underused feature of OpenSSH is the Match statement. Match statements work on OpenSSH 4.4+; applicable versions ship with RHEL/CentOS 6+ and Ubuntu 12.04+. The Match directive accepts the following options:
Multiple Monitors
My Adventures with Multiple Monitors on Linux
Published:
Using multiple monitors on my Linux laptop has introduced a couple of unique issues. The largest of which is that the laptop seems to forget my monitor configuration every time I unplug it.
Ownership
Backup and Restore Permissions in Linux
Published:
Inevitably every Linux administrator will eventually have to alter permissions and owerships, perhaps even FACLs. But what happens when your changes go awry? The problem is amplified if you were making changes recursively!
Permissions
Backup and Restore Permissions in Linux
Published:
Inevitably every Linux administrator will eventually have to alter permissions and owerships, perhaps even FACLs. But what happens when your changes go awry? The problem is amplified if you were making changes recursively!
Postfix
SMTP Sender-Dependent SASL Authentication in Postfix
Published:
In a previous article I discussed how to use Mailgun as a relay in Postfix. This works great if you are only sending email from one website on your server, often times however you will have multiple websites sending email on a single server. In these cases, websites NOT belonging to the sender domain will say sent via SENDER_DOMAIN: wes@example.com via necrux.com
Getting Started with Mailgun
Published:
Mailgun is a developer-centric approach to email. It can be used to simply relay email, but it can do so much more! In this article I am going to discuss basic configuration for using Mailgun as a relay with Postfix and briefly discuss some of the additional features offered by Mailgun.
Python
What’s with this?
Published:
The Zen of Python is a well-known document in the Python community. It quite succinctly, and humorously, lays out all of the guiding principles for Python’s design. The Zen of Python is never more than a few keystrokes away; it can be viewed at anytime by running the this module either via the terminal or from the Python interrupter:
Rackspace
Getting Started with Mailgun
Published:
Mailgun is a developer-centric approach to email. It can be used to simply relay email, but it can do so much more! In this article I am going to discuss basic configuration for using Mailgun as a relay with Postfix and briefly discuss some of the additional features offered by Mailgun.
Reverse Engineering
What’s with this?
Published:
The Zen of Python is a well-known document in the Python community. It quite succinctly, and humorously, lays out all of the guiding principles for Python’s design. The Zen of Python is never more than a few keystrokes away; it can be viewed at anytime by running the this module either via the terminal or from the Python interrupter:
SFTP
(S)FTP(S) or: How I Learned to Stop Worrying and Love File Transfer
Published:
File transfer is a fundamental concept of the Internet, however there are a plethora of configuration options that often lead to confusion. In this article I am going to discuss installation and configuration of FTP, FTPS, and SFTP as well as how to chroot (i.e. jail) users for these services.
SSH
The Anatomy of an SSH Connection
Published:
Over the last couple of days I have become increasingly interested in unraveling the mysteries behind establishing an SSH connection. The process is very intricate and some of the documentation seems scattered, so I decided to write a bit about it in the hopes that someone else may benefit.
SSH Match Statements
Published:
An often underused feature of OpenSSH is the Match statement. Match statements work on OpenSSH 4.4+; applicable versions ship with RHEL/CentOS 6+ and Ubuntu 12.04+. The Match directive accepts the following options:
SSH Encryption
The Anatomy of an SSH Connection
Published:
Over the last couple of days I have become increasingly interested in unraveling the mysteries behind establishing an SSH connection. The process is very intricate and some of the documentation seems scattered, so I decided to write a bit about it in the hopes that someone else may benefit.
Shortcuts
Bash Shortcuts
Published:
I tend to spend quite a bit of my time on a command line, so I am always looking for little ways to make my life easier. Because of that, this post will be a bit of a living document that I plan to occasionally update as I discover more handy tricks. This is not a comprehensive list, nor is it intended to be one. These are shortcuts that allow me to have a smoother workflow.
Span Wallpaper
My Adventures with Multiple Monitors on Linux
Published:
Using multiple monitors on my Linux laptop has introduced a couple of unique issues. The largest of which is that the laptop seems to forget my monitor configuration every time I unplug it.
The Zen of Python
What’s with this?
Published:
The Zen of Python is a well-known document in the Python community. It quite succinctly, and humorously, lays out all of the guiding principles for Python’s design. The Zen of Python is never more than a few keystrokes away; it can be viewed at anytime by running the this module either via the terminal or from the Python interrupter:
VirtualBox
Headless VMs with VirtualBox
Published:
VirtualBox offers a neat feature called “Seamless Mode” that allows you to seamlessly integrate windows from the host and guest operating systems. This feature proves to be problematic however if the host is a Windows operating system. The alternative is to run the guest as a headless VM and port forward connections from the host to the guest. This is a lightweight solution and can achieve Windows/Linux harmony (as well as can be expected).
Virtualization
Headless VMs with VirtualBox
Published:
VirtualBox offers a neat feature called “Seamless Mode” that allows you to seamlessly integrate windows from the host and guest operating systems. This feature proves to be problematic however if the host is a Windows operating system. The alternative is to run the guest as a headless VM and port forward connections from the host to the guest. This is a lightweight solution and can achieve Windows/Linux harmony (as well as can be expected).
docs
Finding Help in Linux
Published:
Linux is chock-full of documentation, the challenge however is knowing where to find that documentation. One of the first things that every Linux user ought to learn is how to view the manual pages, man <command>, but there is more to know. The man pages are divided into 9 sections:
SMTP Sender-Dependent SASL Authentication in Postfix
Published:
In a previous article I discussed how to use Mailgun as a relay in Postfix. This works great if you are only sending email from one website on your server, often times however you will have multiple websites sending email on a single server. In these cases, websites NOT belonging to the sender domain will say sent via SENDER_DOMAIN: wes@example.com via necrux.com
Getting Started with Mailgun
Published:
Mailgun is a developer-centric approach to email. It can be used to simply relay email, but it can do so much more! In this article I am going to discuss basic configuration for using Mailgun as a relay with Postfix and briefly discuss some of the additional features offered by Mailgun.
logs
Parse Log Files with sed
Published:
When parsing log files sed is not the go-to tool for most techs, but it offers a pretty neat feature: the ability to easily search a log file for a specific date/time range.
SMTP Sender-Dependent SASL Authentication in Postfix
Published:
In a previous article I discussed how to use Mailgun as a relay in Postfix. This works great if you are only sending email from one website on your server, often times however you will have multiple websites sending email on a single server. In these cases, websites NOT belonging to the sender domain will say sent via SENDER_DOMAIN: wes@example.com via necrux.com
Getting Started with Mailgun
Published:
Mailgun is a developer-centric approach to email. It can be used to simply relay email, but it can do so much more! In this article I am going to discuss basic configuration for using Mailgun as a relay with Postfix and briefly discuss some of the additional features offered by Mailgun.
sed
Parse Log Files with sed
Published:
When parsing log files sed is not the go-to tool for most techs, but it offers a pretty neat feature: the ability to easily search a log file for a specific date/time range.
this.py
What’s with this?
Published:
The Zen of Python is a well-known document in the Python community. It quite succinctly, and humorously, lays out all of the guiding principles for Python’s design. The Zen of Python is never more than a few keystrokes away; it can be viewed at anytime by running the this module either via the terminal or from the Python interrupter: