Use du to show directory sizes only | du can show directory sizes only. This is helpful to get a quick glance at what directories are taking up space. Here’s the command I like to use: $ du -sh * Here is what it looks like in action from /var on one of my servers: stmiller@li166-66:/var$ sudo du -sh * 38M backups 48M
How to Generate a Private Key and CSR from Command Line
How to Generate a Private Key and CSR from Command Line | Use the following command to generate a private key and certificate signing request (CSR): $ openssl req -new -newkey rsa:2048 -nodes -keyout server_private.key -out server_csr.csr In the dialog that follows, pay particular attention to the CommonName (CN) indication. If you need a certificate for example.com, use example.com (exactly) as the CN. For example, if you
Monitor MySQL Performance with mytop
Monitor MySQL Performance with mytop | mytop is an excellent app to monitor mysql performance. Let’s check it out! Firstly, install mytop: $ sudo apt-get install mytop Run mytop with tack tack prompt to have mytop prompt for the root mysql password: $ mytop –prompt Done! You can now monitor the number of mysql queries the server is processing as well
Make your terminal snow
Make your terminal snow | Make your terminal snow with this cool python terminal app. The github page is: https://gist.github.com/1508912
Tunnel DNS through ssh -D socks proxy
Tunnel DNS through ssh -D socks proxy | When using ssh -D to setup a socks proxy, DNS queries and DNS traffic are not sent through the ssh tunnel. However, with Firefox a config change can be made to send DNS traffic through the ssh tunnel. Here’s how it works! First, establish an ssh proxy: $ ssh -D 9000 user@host Then in Firefox,
Use hdparm to Retrieve Hard Drive Specs
Use hdparm to Retrieve Hard Drive Specs | hdparm is an excellent command line utility for various things concerning hard drives. A quick feature it has is to provide detailed specs of a particular hard drive. I’ll show you how it works! The command is sudo hdparm -I hard drive Here is an example: $ sudo hdparm -I /dev/sdc /dev/sdc: ATA device, with
Nessus html5 URL
Nessus html5 URL | Nessus now has a fancy html5 interface! The URL is: https://localhost:8834/html5.html
CentOS 6 or Red Hat 6 | Install DHCP Server
CentOS 6 or Red Hat 6 | Install DHCP Server | On CentOS 6 or Red Hat 6, installing a DHCP server is not too difficult. I’ll show you how it works! First, install the DHCP server: $ sudo yum install dhcp The configuration file (blank) is located here: /etc/dhcp/dhcpd.conf To copy a sample configuration file over for the production file, use the following command: $
Use nmap to check DNS configuration best practices
Use nmap to check DNS configuration best practices | A new NSE script in nmap 6.25 checks DNS zone configuration best practices. I’ll show you how it works! First, you will need nmap 6.25 (or later) installed: http://nmap.org/download.html Now with nmap 6.25 installed, run the below command against a DNS server. In this example, I am checking the configuration of the zone google.com from
Wordfence: Security Plugin for WordPress
Wordfence: Security Plugin for WordPress | Here is a review of Wordfence, a WordPress security : Wordfence: Security Plugin for WordPress If you find this topic interesting, you may also be interested in Expert Pen Testing or CISSP training. Cool!
