The Helpdesk For I.T. Administrators
Most Linux distributions allow the root user to connect in via SSH, and CentOS is no exception. It is recommended that root logins are never used, and you should use either su or sudo to elevate the permissions of a normal user account. As such, the best option is to disable root logins in the …
Most Linux distributions allow the root user to connect in via SSH, however if you try to connect into Ubuntu as root after a default install, you will find that you wont be able to get in. While it may look like the root account is not permitted to login, it is just because that …
A default install of CentOS will enable IPv6 connectivity. If you don’t need IPv6, there is no need to have it enabled. Follow the steps below to disable IPv6 on a CentOS install. Note: Run these commands as a user with root privileges. Check to see if you’re installation is currently set up for IPv6: …
A default install of Ubuntu will enable IPv6 connectivity. If you don’t need IPv6, there is no need to have it enabled. Follow the steps below to disable IPv6 on a Ubuntu install. Check to see if you’re installation is currently set up for IPv6: $ cat /proc/sys/net/ipv6/conf/all/disable_ipv6 If the output is 0, IPv6 is …
If your FreeBSD install is currently set up to obtain an IP address automatically via DHCP, and you want to change it to use a static IP, this article is for you. If you want to set up any sort of server on the machine, it is advisable to set up a static IP address. …
FreeBSD provides the ‘freebsd-update’ tool to allow for easy checking/downloading/installation of security patches. Updating FreeBSD is a two stage process. You need to first download (or ‘fetch’) the updated packages, and then you need to actually install the updated packages. This two stage process allows you to set up a cron job to routinely check …
On a default installation of FreeBSD you will find that you can’t SSH into the server using the root account, and any accounts that you have added, can’t run the ‘su’ command to elevate to root. To enable ‘su’ access, the user needs to be part of the ‘wheel’ group. Note: These commands must be …
An important aspect of any firewall are the log files. Iptables on Linux provides logging functionality, however by default, it will get outputted to the /var/log/messages log file. This can clutter things up, and make it hard to check the logs. If you want to change the file that IPTables logs to, you need to …
If you have Firefox and AVG Antivirus installed on the same PC, you may find that at some stage you are unable to press the enter key in the location bar in Firefox, and have to resort to hitting the -> arrow to the right of the location bar manually. This is caused by the …
VMWare ESXi/vSphere 5 has the option to accept SSH connections to the server, to allow access to the file system of the server itself. By default SSH is disabled, and its not the easiest setting to find if you do need to enable it. This guide will show you how to enable the SSH server. …