Krishna Ubuntu 18.04 LTS – New Features: Ubuntu 18.04 LTS has been released with a lot of new features and improvements, some of the important features are listed below: Support and Updates of Ubuntu 18.04 LTS for next 5 Years (April 2023) New latest and stable Linux Kernel version 4.15 Installer offer a new option of … Read more
linux understands both the Berkely lpr and the System V (lp) set of printer commands. Most distributions include a graphical-based utility allowing people more flexibility in their printing. kprinter allows people to select which printer to use, and which properties to enable, all with the click of a mouse. It is part of the CUPS … Read more
Quantum computing is expected to gain momentum during this decade as economic powers around the world ramp up their investments in quantum technologies. The fact that economies have begun to invest in this technology has raised hope for it. “In India, the National Mission of Quantum Technology and Application plans to invest $1.12 billion over … Read more
This article is concerned with the creation, deletion, and manipulation of files. By the end of this section, the user should be able to identify all files within a directory, create new ones, remove others, display the contents of some, rename others, and more. ls: Listing The contents of a directory can be displayed using … Read more
Now that the UNIX tree-structured file system has been introduced, it would be useful to know how to find our way through the system and how to create files, delete them and rename them. cd: Change Directory To move from one directory to another the cd command is used. Use as: cd [directory] directory may … Read more
This article will deal with how to log on to the UNIX system, and how to log out. Logging On Initially, a user needs to get a userid and, optionally, a password. The userid is typed in at the login prompt, which usually looks like: login: Following the logon, the password prompt will appear: password: … Read more
Traditionally, UNIX systems allow any host, from anywhere, to connect to its various services (such as telnetd, ftpd, POP/IMAP). Since the majority of NRC’s systems are connected directly off the Internet, it means anyone may have access to the systems and their services. To restrict who has access to which service, TCP wrappers are used … Read more
SSH (Secure SHell) is a protocol used to provide secure connections between two hosts. The secure connection is provided by encrypting the entire session between the two systems. Each system has a pair of keys: a private and a public key. The keys are created at the same time, so they do have a direct … Read more
To system administrators: use the rules. make sure every user uses a password. limit the number of people who know the root password, to at least one more than yourself, but not too many. use the root account only when performing system administration work.
File permissions have already been introduced in the File System article. USE them. If you have a file, or a directory which contains sensitive information, close it to everyone but yourself (using chmod 700 file). If a file is to be run, but the contents should not be seen by any user, do not allow … Read more