Command Line

If you ever need to communicate with a POP3 server via telnet to test it, here’s some commands you can use:

To pretty much completely disable SSH timeouts, simply adjust the following directives in /etc/ssh/sshd_config:

Before you upgrade Plesk, it’s always a good idea to make a backup and also make your ip and shell maps:

If you have too many files to remove, try this trick:

First, you have to get the certificate and key out of Windows in a pfx (PKCS #12) format.

If you’ve ever worked on a linux system, chances are that you’ve used chmod many times.

LVM is handy when you want additional flexibility to grow or shrink your storage space safely without impacting filesystems negatively.

Okay, so we know it’s easy to measure web, ftp and mail traffic, right?

You can delete them based on what they’re doing:

Check for a SYN flood:

If you have a Cisco device logging to RHEL, here’s all that’s necessary:

If you have a ton of files in a directory and you need to remove them, but rm says that the “argument list [is] too long”, just use find and xargs: