The shell in the Linux operating system is used as a command line interpreter. It works between user input and Linux Kernel. The user’s requests are taken in the form of commands via the terminal that is passed to the Linux default shell, which tells the Linux Kernel to perform the spec...
Grep is a small UNIX program for finding matching patterns. First released in V6 UNIX, you can now find it on almost any UNIX-like system such as Linux, macOS, and even BSDs. In this article, I will go through the basics of Grep and show you some examples of how to use the program...
Linux traditionally treats everything as a file or directory to read from or to write to. So when we look at/dev/sda,we can assume it is an absolute path. Why is this path important and where does it lead us? /devis a directory in the root folder that contains all thedevice files....
.bashrcfile is a script file that’s executed when a user logs in. The file itself contains a series of configurations for the terminal session. This includes setting up or enabling: coloring, completion, shell history, command aliases, and more. It is ahidden fileand simplels command To vi...
ls -ld secure-file.txt The file is secure against snooping from any other users. Closing your terminal window discards the temporary umask setting. Other Ways umask Is Used Linux allows some processes to inherit system umask values, or to be given their own umask settings. For example,useradd...
What is Linux exactly? Linus Torvalds, from Finland, released an operating system kernel under the name Linux in 1991. The word is a composition of his first name and the underlying model, Unix. This basic interface between software and hardware was, and still is, used as a basis for a...
In Linux, UID 0 and GID 0 is reserved for the root user. How to find the UID of a user in Linux? You can always rely on the /etc/passwd file to get the UID of a user. That’s not the only way to get the UID information in Linux. ...
You can verify that the cleanup process has been executed with thelscommand that shows that the object files and redswitches have been removed. Compile All Files Use the commandmake -Bto compile every file in your project, not just the ones that have changed. This is equivalent to doing a...
Linux operating system Linux is anopen-source platformdeveloped in1991 by Linus Torvalds.It is used in a wide variety of devices as an operating system, like in computers, servers, mobiles, mainframes, and other embedded devices. As it is open-source software, users can customize this operatin...
File descriptors are a core concept in Linux and other Unix-like operating systems. They provide a way for programs to interact with files, devices, and other input/output (I/O) resources. Simply put, a file descriptor is like a "ticket" or "handle" that a program uses to access these...