While checking the status of packages using dpkg, it is possible to see a ‘rc’ state for some unused packages, this corresponds to:
r: the package was marked for removal
c: the configuration files are currently present in the system
In other words: the package is not completely removed (config files are still present), but not installed anymore (and obviously not used).
NFSen (NetFlow SENsor) is a Web-Based Front-End for the nfdump netflow tools.
NfSen is very useful and allows network administrators to:
Display netflow data: Flows, Packets and Bytes using RRD (Round Robin Database).
Easily navigate through the netflow data.
Process the netflow data within the specified time span.
Create history as well as continuous profiles.
Set alerts, based on various conditions.
Customize and Create plugins to process netflow data on a regular interval.
The installation on Linux can be tricky, here I’ll show my way (using, where possibole, distribution supported apt packages) in Ubuntu Server 12.04 LTS.
Install VMWare Tools can be tricky, all informations found OnLine (including VMWare’s website) can be considerated not fully complete or specific for Ubuntu Distribution.
This simple procedure describes how to install VMWare Tools v4 on Ubuntu 12.04 LTS Server.
The stable version of Linux Kernel 3.5 has been released and comes with many new features and bug fixes.
This kernel has known improvements in support for devices and file systems (ext4).
Here are some other new features:
- FireWire Target Disk Mode Support.
- EXT4 supports now CRC32 Meta-Data.
- Improved support for graphics cards especially nVidia and AMD GPUs.
Network Engineers simply need to sniff packets over Networks. Sniffing is not an option or a Lamer activity, sniffing is the base of Network Troubleshooting.
Using Wireshark, one of the best Network Sniffers (and more) could be tricky, if the software is launched from an unprivileged User Account since access to network interfaces won’t be possible (no device will be listed as available to start packets capture).
On the other side, it is strongly recommended to not run Wireshark as root for security reasons.