Linux Consultant

June 19, 2018 | by Scott Kilroy

ssh tips

Someday I’ll get around to writing up my own tips but until then this is a pretty good guide http://lugatgt.org/2009/10/28/ssh-tips-and-tricks-2/

June 19, 2018June 19, 2018 | by Scott Kilroy

# .bash_profile # Get the aliases and functions if [ -f ~/.bashrc ]; then . ~/.bashrc fi # User specific environment and startup programs PATH=$PATH:$HOME/bin:/sbin export JAVA_HOME=/usr/java/jdk1.6.0_05/bin/java export PATH=$PATH:/usr/java/jdk1.6.0_05/bin export HISTIGNORE=”&” export EDITOR=nano export PATH unset USERNAME alias rm=’rm -i’ alias cp=’cp -i’ alias ls=’ls –color’ alias zf=’zf.sh’ echo -e “\033[36m########################## \033[0m” echo -e “\033[36mServer $HOSTNAME \033[0m” echo -e “\033[36mWelcome back $USER \033[0m” echo -e “\033[36musers loggged in: \033[0m” echo -e “\033[36m `users ` \033[0m” echo -e “\033[36m`uptime` \033[0m” echo […]

June 19, 2018 | by Scott Kilroy

bashrc

Here is my typical .bashrc file # .bashrc # Source global definitions if [ -f /etc/bashrc ]; then . /etc/bashrc fi # append commenads to bash_history (when using more then one window) shopt -s histappend PROMPT_COMMAND=’history -a’ # User specific aliases and functions PATH=$PATH:$HOME/bin:/sbin #export JAVA_HOME=/usr/java/jdk1.6.0_05/bin/java export HISTIGNORE=”&” export EDITOR=nano export PATH unset USERNAME #function PWD { #pwd | awk -F\/ ‘{print $(NF-1),$(NF)}’ | sed ‘s/ /\\//’ #} #export PS1=”\[\033[0;32m\]\u@\h \[\033[33m\]\$(pwd 3)\[\033[0m\] \$ “;

June 19, 2018 | by Scott Kilroy

apache – watch httpd for connected clients

watch httpd for connected clients watch “netstat -anpt | grep httpd | grep ESTABLISHED|cut -b45-60 | cut -d’:’ -f1 | sort” OR netstat -plan|grep :80|awk {‘print $5’}|cut -d: -f 1| sort|uniq -c | sort -nk 1

June 19, 2018 | by Scott Kilroy

apache – test mod_evasive is setup correctly

You can use this simple script to test mod_evasive is installed and running. I didn’t write this but forgot where I found it. Sorry for the lack of credit where it’s due. #!/usr/bin/perl # test.pl: small script to test mod_dosevasive’s effectiveness use IO::Socket; use strict; for(0..100) { my($response); my($SOCKET) = new IO::Socket::INET( Proto => “tcp”, PeerAddr=> “w3.fiendishplan.com:80”); if (! defined $SOCKET) { die $!; } print $SOCKET “GET /?$_ HTTP/1.0\n\n”; $response = ; print $response; close($SOCKET); }

June 19, 2018 | by Scott Kilroy

Apache modrewrite examples

modrewrite rule if you create folder it can be used as a subdomain RewriteCond %{HTTP_HOST} !^www\.website\.com$ RewriteCond %{HTTP_HOST} ^(.*)\.website\.com(.*) [NC] RewriteCond %{DOCUMENT_ROOT}/%1 -d RewriteRule ^(.*)$ http://www.website.com/%1$1 [P,L] requires both mod_rewrite and mod_proxy to be running 1. Forcing www for a domain while preserving subdomains RewriteCond %{HTTP_HOST} ^([a-z.]+)?example\.com$ [NC] RewriteCond %{HTTP_HOST} !^www\. [NC] RewriteRule .? http://www.%1example.com%{REQUEST_URI} [R=301,L] Site has permanently moved to new domain # domain.com to domain2.com RewriteCond %{HTTP_HOST} ^www.domain.com$ [NC] RewriteRule ^(.*)$ http://www.domain2.com/$1 [R=301,L] RewriteEngine on RewriteCond /your/docroot/%{REQUEST_FILENAME} !-f […]

June 19, 2018June 19, 2018 | by Scott Kilroy

Installing apache mod_evasive on ubuntu

apt-get install libapache2-mod-evasive in /etc/apache2/conf.d create file called modevasive with the following: <code> <ifmodule mod_evasive20.c> DOSHashTableSize 3097 DOSPageCount 2 DOSSiteCount 50 DOSPageInterval 1 DOSSiteInterval 1 DOSBlockingPeriod 10 DOSLogDir /var/log/mod_evasive DOSEmailNotify ADD_EMAIL DOSWhitelist 127.0.0.1 </ifmodule>

June 19, 2018 | by Scott Kilroy

Nginx with certbot

Remember when setting up certbot using nginx to turn off the line in your config that blocks files that start with . This line: location ~ /\. { access_log off; log_not_found off; deny all; } A good guide can be found here https://www.digitalocean.com/community/tutorials/how-to-secure-nginx-with-let-s-encrypt-on-ubuntu-16-04

June 19, 2018 | by Scott Kilroy

Test ssl setup

To test ssl is setup correctly run the following: openssl s_client -connect IP_OR_DOMAIN_NAME:443

June 19, 2018June 19, 2018 | by Scott Kilroy

Check open ports with nmap

If you want to check if a particular port is open run nmap -p PORT_NUMBER IP_OR_DOMAIN_NAME for example nmap -p 80 example.com To use nmap to check if a port is open for tcp nmap -p port ipaddress for udp nmap -sU -p port ipaddress

June 4, 2018 | by Arround The Web

Top GitHub Alternatives to Host Your Open Source Projects

If you are looking to migrate from GitHub, here are some of the best alternatives to GitHub for hosting the source code of your open-source project.

May 17, 2018 | by Scott Kilroy

Step By Step Ubuntu 18.04 (Bionic Beaver) LAMP Server Setup

In around 15 minutes, the time it takes to install Ubuntu Server Edition, you can have a LAMP (Linux, Apache, MySQL and PHP) server up and ready to go. This feature, exclusive to Ubuntu Server Edition, is available at the time of installation.The LAMP option means you don’t have to install and integrate each of […]

May 9, 2018 | by Scott Kilroy

Ubuntu 18.04 LTS Screenshots Tour

The ‘main’ archive of Ubuntu 18.04 LTS will be supported for 5 years until April 2023. Ubuntu 18.04 LTS will be supported for 5 years for Ubuntu Desktop, Ubuntu Server, and Ubuntu Core. Ubuntu Studio 18.04 will be supported for 9 months. All other flavors will be supported for 3 years. (…)Read the rest of […]

May 8, 2018 | by Scott Kilroy

What is new Ubuntu 18.04 LTS Desktop

May 8, 2018 | by Scott Kilroy

Upgrade Ubuntu 17.10 to Ubuntu 18.04 LTS

May 8, 2018 | by Scott Kilroy

Install and monitor services using Monit on ubuntu 17.10 Server

Monit is a utility for managing and monitoring, processes, files, directories and devices on a UNIX system. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations. (…)Read the rest of Install and monitor services using Monit on ubuntu 17.10 Server (877 words) © ruchi for Ubuntu Geek, 2018. | […]

March 5, 2018 | by Arround The Web

Whitelisting rpmlint errors in Taskotron/Bodhi

If you submit a new Fedora update into Bodhi, you’ll see an Automated Tests tab on that update page (an example), and one of the test results (once it’s done) will be from rpmlint. If you click on it, you’ll get a full log with rpmlint output. If you wish to whitelist some errors which … Continue reading Whitelisting rpmlint errors in Taskotron/Bodhi →

October 6, 2017 | by Arround The Web

Automatically shrink your VM disk images when you delete files

Update: This got significantly simpler with newer qemu and virt-manager, read an updated post. If you use VMs a lot, you know that with the most popular qcow2 disk format, the disk image starts small, but grows with every filesystem change happening inside the VM. Deleting files inside the VM doesn’t shrink it. Of course … Continue reading Automatically shrink your VM disk images when you delete files →

June 18, 2015 | by Arround The Web

Catching up!

A lot has changed since the last blog post (more than three years). I was happily running a successful business around Videocache till Google decided to push HTTPS really hard and enforced SSL even for video content. That rendered Videocache completely useless as YouTube video caching was the unique selling point. Though people are still … →

May 22, 2012 | by Arround The Web

Insanely Awesome Web Interface for Your Git Repos

Almost 80-90 people visit How To: Install and Configure GitWeb everyday in search of setting up a web interface for their git repositories. Though gitweb is nice, it’s a bit painful to setup and the web interface is not that appealing. The other day I received this email from Klaus Silveira Hello Kulbir, I saw your article … →