In this article, we will see how to Configure Proxy for Yum Repository. If our servers are accessing the internet via a “Proxy Server“, we can see that even if we can access the internet when we run a command such as “yum install package-name“, we can’t access it. In such a case, the settings that we will talk about in our article should be made.
1. We open the “etc/yum.conf” file on our server and edit it as follows.
An abbreviation for “ NTP Network Time Protocol”. NTP is a protocol used to synchronize the clocks of computers on packet-switched networks with variable latency. The protocol is specifically designed to be resistant to the effects of variable delay, thanks to the use of jitter buffers. NTP is one of the oldest Internet protocols still in use. NTP uses the User Datagram Protocol (UDP) over port 123. NTP settings are made from either the /etc/ntp.conf or /etc/xntp.conf file, depending on which Linux distribution is used.
Many users use the top command to monitor the processes running on the Linux operating system from the command line and to see the amount of CPU and memory these processes use. In this article, we will learn the htop application, which has a similar task with the top command but provides easier use.
The first striking change in the htop application is that there is a text graph at the top of the screen showing the usage of all cores, memory, and swap space. This part is much more understandable and useful than the top command.
The lsb_release command is used to get information about the operating system on Linux. Using this command alone does not mean anything, for this, it is necessary to use the relevant parameters after the command.
lsb_release [parametre]
Let’s see the lsb_release --help the command to see the available parameters:
If we want to see all the information, the lsb_release -a the command is used for this.
It is learned by using the uname (Unix Name) the command to learn kernel information.
John Ripper is a fast password cracker currently available for many variants of Unix, macOS, Windows, DOS, BeOS, and OpenVMS. Its primary purpose is to detect weak Unix passwords. In addition to the hash type of several crypt passwords most commonly found in various Unix codes, Kerberos / AFS and Windows LM hashes, as well as DES-based tripcodes and hundreds of additional hash and encryption versions in -jumbo.
In this article, we will now see how to crack and obtain a PDF password by attacking Brute Force with John The Ripper.