Technical documentation on the subject of IT and more
Andreas Wittmann I often adjust various hard drive parameters when using dd. Although the setting options may not be very prominent, the transfer speed ultimately depends primarily on the hardware being used. The following parameters have proven successful for me when working with loopback devices:
Today i got the message from my Emacs after typing package-list-packages. The full error is listed below: It seem’s that i wasn’t able to install elpa-packages anymore. After some research i got the hint to install gnu-elpa-keyring-update with the Emacs-package-manager to solve this problem. That sounds easy but before installing a package i had to … Read more
Simple network routes can be set under Linux using the route command become. Here is a simple example: In order for this change to be active even after a restart, the file /etc/network/interfaces must be changed.
This is not actually intended and there is no clean way to do it. However, it is possible to change an environment variable of an existing process using a debugger. Specifically, this is about the debugger called gdb. This can attach itself to existing processes and carry out various operations. Among other things, changing environment … Read more
In times of Facebook, Google and YouTube, why should it still be necessary torely on outdated technology like Usenet/NNTP? Portals like phpBB also invite youto exchange ideas with other users. So why should you use Usenet these days? From my point of view the question is very simple: It is a tried and testedstandard, similar … Read more
Recently I noticed on a freshly installed server that there was no command called nslookup. Luckily, Debian-like distributions have the apt-file tool. This makes it possible to search for applications that are not yet installed but are in principle available in the APT repository. The command quickly shed light on the matter and delivered the … Read more
Especially with automated scripts which establish SSH connections to external systems, the request for a password within the script is undesirable or leads to the script being blocked. It is possible to simulate such password entries with the expect tool, but this is anything but secure. The best way is authentication via RSA keys, which … Read more
There are several approaches here. The order of the images is problematic. The easiest way would be by: A warning is issued here because the pipe is aborted and ffmpeg does not seem to be able to recognize this. Another method would be via image names which contain a sequential counter in the file name. … Read more
As an admin, one often wants to find out whether CIFS shares can be addressed under Linux or whether these have been created correctly in terms of authorization. The Linux program smbclient is suitable for this purpose. It works on a console basis and thus checks can be carried out here, e.g. by scripts. A … Read more
Individual files can also be transferred using netcat. To do this, thefollowing instructions must be used on the transmitter and receiver: On the receiver: At the sender: Explanation: The recipient starts a server service based on the first parts,which reacts to requests on TCP port 8888. With the instruction > dest the content of received … Read more