Command Line

List all mysql databases on server root@srv1 [~]#  mysql -bse “show databases”

Telnet should be disabled on all web servers, and you should use SSH which is more secure. Telnet sends password in plain text passwords and usernames through logins, and ‘crackers/hackers’ can obtain these passwords easily as compared to SSH. TELNET server listens for incoming messages on port 23, and sends outgoing messages to port 23. …

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Create a strong CSR and private keyopenssl req -new -nodes -newkey rsa:2048 -out server.crt -keyout server.key   Parsing out the data within a certificateopenssl asn1parse -in server.crt Checking a certificate/key modulus to see if they correspondopenssl rsa -in server.key -modulus -noout | openssl md5openssl x509 -in server.crt -modulus -noout | openssl md5 Convert a key …

OpenSSL Tricks Read More »

Installing new hardware may mean that new kernel need to be loaded when your server boots up. There’s a two step process to making a new initrd file:   First, add the appropriate line to your /etc/modules.conf or /etc/modprobe.conf which corresponds to your new kernel module. Next, rebuild the initial ram disk after making a …

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One question I hear quite often is “how do I add IP aliases in FreeBSD?” It’s not terribly intuitive, but you can follow these steps: Example:Server’s primary IP: 192.168.1.11 Additional IP’s to add: 192.168.1.12, 192.168.1.13, and 192.168.1.14   Boot-time configuration:Add it to /etc/rc.conf first (so you don’t forget). In this example, we have a Realtek …

Adding IP aliases in FreeBSD Read More »